Publications on Squeeze Film Dampers            July 18, 2024

 

MAJOR APPLICATIONS: Aircraft gas turbines, high performance centrifugal compressors

SPONSORS: GE (1992-94), National Science Foundation, Turbomachinery Research Consortium (1990-2022), Honeywell Aerospace (2008), Pratt &Whitney (2008-2018)

 

TOPICS (select below)

Advanced Models and Experimental Validation   and Integral SFDs

SFD with integral contact mechanical seal      

Air entrainment and bubbly lubricants & parameter identification

Imbalance response and identification

Lubricant vapor cavitation and external pressurization

Feed and discharge grooves

Fluid inertia and lubricant vapor cavitation

++ àTechnical Reports to Turbomachinery Research Consortium  

 

SFDs: invited presentations, lectures  & articles
San Andrés, L., 2024, “Squeeze Film Dampers for Aircraft Engines,” Tutorial ASME GT2024-TOB047, ASME Turbo Expo Conference, London, UK, June 24-28, 2024 (request ppp to Dr. San Andrés).

San Andrés, L., 2024, Measurements and Models of Squeeze Film Dampers’ Forced Response and a Bird’s View to Air Ingestion and Entrapment, ASME – Aircraft Engine Technology Award, Rotterdam, The Netherlands, June 2022

Lu, X., San Andrés, L., and Koo, B., 2022, “On the Influence of Lubricant Feedhole Size and End Plate Seals’ Clearance on the Dynamic Performance of Integral Squeeze Film Dampers,” (Lecture), 2022 Asia Turbomachinery Symposium, May, Kuala Lumpur, Malaysia

San Andrés, L., 2022, “Squeeze Film Dampers: Operation, Models and Issues of Interest,” Vibration and Rotordynamics Short Course, The Turbomachinery Laboratory, Jan. 

San Andrés, L., Jeung, S.-H, Den, S., and Savela, G., 2016 ‘‘Squeeze Film Dampers: A Further Experimental Appraisal of their Dynamic Performance,’’ 45th Turbomachinery Symposium, Texas A&M University, Sept 12-15, Houston, TX, https://doi.org/10.21423/R1BC7T https://oaktrust.library.tamu.edu/handle/1969.1/159802

San Andrés, L., Jeung, S.-H, Den, S., and Savela, G., 2016 ‘‘Squeeze Film Dampers: An Experimental Appraisal of their Dynamic Performance,’’ II Asia Turbomachinery and Pump Symposium, Texas A&M University, Feb 22-25, Singapore https://doi.org/10.21423/R12Q4N  https://oaktrust.library.tamu.edu/handle/1969.1/160259

Zeidan, F., San Andrés, L., and Vance, J., 1996, "Design and Application of Squeeze Film Dampers in Rotating Machinery," Proceedings of the 25th Turbomachinery Symposium, Texas A&M University, September, pp. 169-188, https://doi.org/10.21423/R1694R

San Andrés, L., "Squeeze Film Dampers, A History of their Technological Development," De Appel Nr. 3, pp. 11-13, February 2000 (Magazine from the Isaac Newton Mechanical Engineering Student Society at Universiteit Twente, The Netherlands).

INTEGRAL SFDs

Lu, X., L. San Andrés, L., and B. Koo, 2023, On the Influence of the Lubricant Feed Orifice Size and End Plate Seals’ Clearance on the Static and Dynamic Performance of Integral Squeeze Film Dampers,” pp. 173-189,  IFToMM 2023, Proceedings of the 11th IFToMM International Conference on Rotor Dynamics, Beijing, PRC (September 18-21, 2023).

 

Lu, X., San Andrés, L., Koo, B., and Scott, T., 2021 “On the Effect of the Gap of End Seals on Force Coefficients of a Test Integral Squeeze Film Damper: Experiments and Predictions,” ASME J. Eng. Gas Turb. Pwr., 143(1), p. 011014, https://doi.org/10.1115/1.4048700

 

De Santiago, O., and L. San Andrés, 2003, “Imbalance Response of a Rotor Supported on Flexure Pivot Tilting Pad Journal Bearings in Series with Integral Squeeze Film Dampers,” ASME Journal of Gas Turbines and Power, Vol. 115 (4), pp. 1026-1032 (ASME Paper 2001-GT-257).

 

De Santiago, O., and L. San Andrés, 2000, "Dynamic Response of a Rotor-Integral Squeeze Film Damper to Couple Imbalances,” ASME Paper 2000-GT-0388.

De Santiago, O., and L. San Andrés,  1999,"Imbalance Response and Damping Force Coefficients of a Rotor Supported on End Sealed Integral Squeeze Film Dampers," ASME Paper 99-GT-203 (https://doi.org/10.1115/99-GT-203).

De Santiago, O., San Andrés, L., and J. Oliveras, 1999, "Imbalance Response of a Rotor Supported on Open-Ends, Integral Squeeze Film Dampers," ASME Journal of Gas Turbines and Power, Vol. 121, 4, pp. 718-724 (ASME Paper 98-GT-006).

De Santiago, O., and L. San Andrés, 1998, "Measurements of the Synchronous Response of a Rotor Supported on Integral Squeeze Film Dampers: Couple Imbalance Experiments," Memorias del VII Congreso Latinoamericano de Turbomaquinaria, pp. 43-47, Veracruz, Mexico, November 1998

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ADVANCED MODELS/EXPERIMENTAL VALIDATION

Rodriguez, B., and San Andrés, L., 2024, “Dynamic Forced Response of an O-Rings Sealed Squeeze Film Damper Lubricated with a Low Supply Pressure and a Simple Method to Quantify Air Ingestion,” ASME J. Eng. Gas Turbines Power, Vol. 146(2): 021004, https://doi.org/10.1115/GT2023-100495 ASME Paper GT2023-100495.

 

Rodriguez, B., and San Andrés, L., 2023, “Dynamic Performance of an O-Rings Sealed Squeeze Film Damper Lubricated and a Simple Way to Estimate the (Ingested) Gas Content in a Squeeze Film,” pp. 93-110, IFToMM 2023, Proceedings of the 11th IFToMM International Conference on Rotor Dynamics, Beijing, PRC (September 18-21, 2023).

 

Koo, B., and San Andrés, L., 2022, ”A Model and Experimental Validation for a Piston Rings - Squeeze Film Damper: a Step toward Quantifying Air Ingestion,” ASME J. Eng. Gas Turbines Power, Vol. 145(4): 041012. https://doi.org/10.1115/1.4055712   ASME GT2022-81990.

 

San Andrés, L., and Rodriguez, B., 2021, “On the Experimental Dynamic Force Performance of a Squeeze Film Damper Supplied through a Check Valve and Sealed With O-Rings,” ASME J. Eng. Gas Turbines Power, Vol. 143(11): 111011, https://doi.org/10.1115/1.4051964 (ASME GT2021-58627).

San Andrés, L., and Koo, B., 2020, “Model and Experimental Verification of the Dynamic Forced Performance of a Tightly Sealed Squeeze Film Damper Supplied with a Bubbly Mixture,” ASME J. Eng. Gas Turbines Power, Vol. 142(1): 011023, DOI: 10.1115/1.4044994 (ASME GT2019-90330).

 

San Andrés, L., Koo, B.J., and Seung, J.-H., 2019, “Experimental Force Coefficients for Two Sealed Ends Squeeze Film Dampers(Piston Rings and O-rings): An Assessment of Their Similarities and Differences,” ASME J. Eng. Gas Turbines Power, Vol. 141(2), 02104, DOI: 10.1115/1.4040902 (ASME GT20018-76224) 2019 Best Paper Award, Structures & Dynamics Committee, ASME IGTI (June 2019)

 

San Andrés, L., and Koo, B., 2018, “Effect of Lubricant Supply Pressure on SFD Performance: Ends Sealed with O-rings and Piston Rings” IFTOMM2018-018, 10TH IFToMM INTERNATIONAL CONFERENCE ON ROTOR DYNAMICS, Sept 24-27, 2018, Rio de Janeiro, Brazil.

 

San Andrés, L., Den, S., and Jeung, S-H., 2018, “On the Force Coefficients of a Flooded, Open Ends Squeeze Film Damper: from Theory to Practice (and Back),” ASME J. Eng. Gas Turbines Power, Vol. 140(1), 012502 (11). DOI: 10.1115/1.4037585 (ASME GT2017-63152)

 

San Andrés, L., and Jeung, S.-H, 2016, Response of a Squeeze Film Damper-Elastic Structure System to Multiple Consecutive Impact Loads,” ASME J. Eng. Gas Turbines Power. Vol. 138 (12). DOI: 10.1115/1.4034001  (ASME GT2016-56695)

 

San Andrés, L., Den, S, and Jeung, S.-H, 2016, “Transient Response of a Short-Length (L/D=0.2) Open-Ends Elastically Supported Squeeze Film Damper: Centered and Largely Off-Centered Whirl Motions,” ASME J. Eng. Gas Turbines Power, 138 (12). DOI: 10.1115/1.4034002  (ASME GT2016-43096)

 

San Andrés, L., and Jeung, S.-H, 2015, “Experimental Performance of an Open Ends, Centrally Grooved Squeeze Film Damper Operating with Large Amplitude Orbital Motions,” ASME J. Eng. Gas Turbines Power. Vol. 137 (May), .032508 (9). DOI: 10.1115/1.4028376

 

San Andrés, L., and Jeung, S.-H., 2016, “Orbit Model Force Coefficients for Fluid Film Bearings: A Step Beyond Linearization,” ASME J. Eng. Gas Turbines Power. Vol. 138 (Feb), pp. 022502 (11).   DOI: 10.1115/1.4031237 (ASME GT2015-43487).

 

San Andrés, L., Jeung, S-H, and Bradley, G., 2015,” Force Coefficients for a Short Length Open-Ends Squeeze Film Damper with End Grooves: Experiments and Predictions, ASME GT2015-43096.

 

San Andrés, L., and Jeung, S-H, 2015, “Response of an Squeeze Film Damper to Large Amplitude Impact Loads,” 2015 STLE Annual Meeting & Exhibition, May 18-21, Dallas, TX, USA

 

San Andrés, L., 2014, “Force Coefficients for a Large Clearance Open Ends Squeeze Film Damper with a Central Feed Groove: Experiments and Predictions,” Tribology International, 71, pp. 17-25.

 

San Andrés, L., Jeung, S.-H, and Bradley, G., 2014, “Dynamic Forced Performance of Short Length Open-Ends Squeeze Film Damper with End Grooves, 9th IFToMM International Conference on Rotordynamics, Milan, Italy (2014 Outstanding Paper 1/198 papers)

 

San Andrés, L., Jeung, S-H, and Bradley, G., 2013, “Experimental force Coefficients for an Open Ends Squeeze Film Damper Performing Large Amplitude Circular Orbital Motions, Centered and Off-centered,” 2013 STLE Annual Meeting & Exhibition, May 5-9, Detroit, Michigan, USA

 

San Andrés, L., and Seshaghiri, S., 2013, “Damping and Inertia Coefficients for Two End Sealed Squeeze Film Dampers with a Central Groove: Measurements and Predictions,” ASME J. Eng. Gas Turbines Power, vol. 135 (November), 112503 (1-9) [ASME GT2013-94273].

 

San Andrés, L., 2012, “Damping and Inertia Coefficients for Two Open Ends Squeeze Film Dampers with a Central Groove: Measurements and Predictions,” ASME J. Eng. Gas Turbines Power, vol. 134 (October), 102506, [ASME Paper GT2012-68212].

 

San Andrés, L.., and Delgado, A., 2012, “A Novel Bulk-Flow Model for Improved Predictions of Force Coefficients in Grooved Oil Seals Operating Eccentrically,” ASME J. Eng. Gas Turbines Power, vol. 134 (May), 022509 [ASME Paper GT2011-45274]. 2011 Best Rotordynamics Paper Award –ASME IGTI

 

Delgado, A., and San Andrés, L., 2010, “A Model for Improved Prediction of Force Coefficients in Grooved Squeeze Film Dampers and Grooved Oil Seal Rings”, ASME Journal of Tribology Vol. 132(July), p. 032202 (1-12)

 

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SFDs with mechanical seal – Identification
Delgado, A., and San Andrés, L., 2010, “Identification of Force Coefficients in a Squeeze Film Damper with a Mechanical Seal: Large Contact Force,” ASME Journal of Tribology, Vol. 132(July), p. 032201 (1-7)

 

Delgado, D., and San Andrés, L., 2010, “Identification of Squeeze Film Damper Force Coefficients from Multiple-Frequency, Non-Circular Journal Motions,” ASME J. Eng. Gas Turbines Power, Vol. 132 (April), p. 042501 (ASME Paper No. GT2009-59175)

 

Delgado, A., and L. San Andrés, 2009, “Identification of Force Coefficients in a Squeeze Film Damper with a Mechanical Seal: Large Seal Contact Force,” World Tribology Congress 20009, Kyoto, Japan, September 6-11, 2009

Delgado, A., and San Andrés, L., 2009, “Nonlinear Identification of Mechanical Parameters on a Squeeze Film Damper with Integral Mechanical Seal,”  ASME Journal of Engineering for Gas Turbines and Power,  Vol. 131 (4), pp. 042504 (ASME Paper GT2008-50528)

San Andrés, L., and A. Delgado, 2008, ”Squeeze film Damper with a Mechanical Seal: Experimental Force Coefficients Derived from Circular Centered Orbits,” ASME Journal of Engineering for Gas Turbines and Power, Vol. 130, pp. 042505-1-8 (ASME Paper No GT2007-27436)

San Andrés, L., and A. Delgado, 2007, “Identification of Force Coefficients in a Squeeze Film Damper with a Mechanical Seal, I: Unidirectional Load Tests,” ASME Journal of Engineering for Gas Turbines and Power, 129(3), pp. 858-864 (ASME Paper GT 2006-90782)

San Andrés, L., and A. Delgado, 2007, “Identification of Force Coefficients in a Squeeze Film Damper with a Mechanical Seal, Centered Circular Orbit Tests,” ASME Journal of Tribology, Vol. 129(3), pp. 660-668 (Paper IJTC 2006-12041)

San Andrés, L., and A. Delgado, 2006, “Identification of Force Coefficients in a Squeeze Film Damper with a Mechanical End Seal,” Paper CELT06-74, Memorias del IX Congreso y Exposición Latinoamericana de Turbomaquinaria, Boca del Río Veracruz, Mexico, June 22-23, 2006, ISBN 968-6114-20-3

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Effects of air entrainment and bubbly lubricants on SFD forced performance

San Andrés, L., and O. De Santiago, 2005, “Identification of Journal Bearing Force Coefficients Under High Dynamic Loading,” STLE Tribology Transactions, Vol. 48, 1, pp. 9-17

De Santiago, O., and L. San Andrés, 2004, “Forced Response of a Squeeze Film Damper and Identification of Force Coefficients from Large Orbital Motions,” ASME Journal of Tribology, Vol. 126, 2, pp. 292-300 (ASME Paper 2003-TRIB-162)

San Andrés, L., and O. de Santiago, 2004, “Dynamic Response of Squeeze Film Dampers Operating with Bubbly Mixtures,” ASME Journal of Gas Turbines and Power, Vol. 126, 2, pp. 408-415. (ASME Paper 2002-GT-30317)

San Andrés, L., and S. Diaz, 2003, “Flow Visualization and Forces from a Squeeze Film Damper with Natural Air Entrainment,” ASME Journal of Tribology, Vol. 125, 2, pp. 325-333 (ASME Paper 2002-TRIB-81).

Diaz, S., and L. San Andrés, 2002, “Pressure Measurements and Flow Visualization in a Squeeze Film Damper Operating with a Bubbly Mixture,” ASME Journal of Tribology, Vol. 124, 4, pp. 346-350 (ASME Paper 2001-TRIB-118)

Diaz, S., and L. San Andrés, L., A Model for Squeeze Film Dampers Operating with Air Entrainment and Validation with Experiments,” ASME Journal of Tribology, Vol. 123, 1, pp. 125-133, 2001. (ASME Paper 2000-Trib-207).

San Andrés, L., S. Diaz, and L. Rodriguez, “Sine Sweep Load Versus Impact Excitations and their Influence on the Damping Coefficients of a Bubbly Oil Squeeze Film Damper,” Tribology Transactions, Vol. 44, 4, pp. 692-698, 2001 (Paper STLE 01-NP-18).

Beets, T., S. Diaz, and L San Andrés, "Pressure Measurement and Flow Visualization on a SFD Operating With a Bubbly Lubricant," Proceedings of the 2000 NSF Design & Manufacturing Research Conference, CD rom, Vancouver, Canada, January 3-6, 2000 (Award number 9820845 CMS).

Tao, L., S. Diaz, L. San Andrés, and K.R. Rajagopal, "Analysis of Squeeze Film Dampers Operating with Bubbly Lubricants" ASME Journal of Tribology, Vol. 122, 1, pp. 205-210, 2000 (ASME Paper 99-TRIB-33).

Diaz, S., and L. San Andrés, "Air Entrainment Versus Lubricant Vaporization in Squeeze Film Dampers: An Experimental Assessment of their Fundamental Differences,” ASME Journal of Gas Turbines and Power, Vol. 123 (4), pp. 871-877, 2001. (ASME Paper 99-GT-187).

Diaz, S., and L. San Andrés, "A Method for Identification of Bearing Force Coefficients and its Application to a Squeeze Film Damper with a Bubbly Lubricant," STLE Tribology Transactions, Vol. 42, 4, pp. 739-746, 1999, (STLE Paper 99-AM-5).

San Andrés, L., and S. Diaz, "Effects of Bubbly Oil on Squeeze Film Damper Force Performance," Proceedings of the VI PACAM Conference, Rio de Janeiro, Brazil, January 1999, Applied Mechanics in the Americas, Volume 8, Dynamics, pp. 1523-1526.

Diaz, S., and L. San Andrés, "Reduction of the Dynamic Load Capacity in a Squeeze Film Damper Operating with a Bubbly Lubricant", ASME Journal of Gas Turbines and Power Vol. 121, pp. 703-709, 1999 (ASME Paper 98-GT-109).

Diaz, S., and L. San Andrés, "Effects of Bubbly Flow on the Dynamic Pressure Fields of a Test Squeeze Film Damper," ASME Fluids Engineering Division Summer Meeting (FEDSM’98), Washington, DC June 1998.

Diaz, S., and L. San Andrés, "Measurements of Pressure in a Squeeze Film Damper with an Air/Oil Bubbly Mixture," STLE Tribology Transactions, Vol. 41, 2, pp. 282-288 (STLE Paper 97-WTC-8), 1998.

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Imbalance response of a test rotor supported on SFDs

Diaz, S. and L. San Andrés, L., 2000, "Orbit-Based Identification of Damping Coefficients on Off-Centered Squeeze Film Dampers Including Support Flexibility," ASME Paper 2000-GT-0394.

 

De Santiago, O., and L. San Andrés, 2003, “Imbalance Response of a Rotor Supported on Flexure Pivot Tilting Pad Journal Bearings in Series with Integral Squeeze Film Dampers,” ASME Journal of Gas Turbines and Power, Vol. 115 (4), pp. 1026-1032 (ASME Paper 2001-GT-257).

 

De Santiago, O., and L. San Andrés, 2000, "Dynamic Response of a Rotor-Integral Squeeze Film Damper to Couple Imbalances,” ASME Paper 2000-GT-0388.

De Santiago, O., and L. San Andrés,  1999,"Imbalance Response and Damping Force Coefficients of a Rotor Supported on End Sealed Integral Squeeze Film Dampers," ASME Paper 99-GT-203 (https://doi.org/10.1115/99-GT-203).

De Santiago, O., San Andrés, L., and J. Oliveras, 1999, "Imbalance Response of a Rotor Supported on Open-Ends, Integral Squeeze Film Dampers," ASME Journal of Gas Turbines and Power, Vol. 121, 4, pp. 718-724 (ASME Paper 98-GT-006).

De Santiago, O., and L. San Andrés, 1998, "Measurements of the Synchronous Response of a Rotor Supported on Integral Squeeze Film Dampers: Couple Imbalance Experiments," Memorias del VII Congreso Latinoamericano de Turbomaquinaria, pp. 43-47, Veracruz, Mexico, November 1998.

Lubell, D., and L., San Andrés, 1998, "Imbalance Response of a Test Rotor Supported on Squeeze Film Dampers," ASME Journal of Engineering for Gas Turbines and Power, Vol. 120, 2, pp. 397-404, 1998 (ASME Paper 97-GT-12).

Lubell, D., and L., San Andrés, 1997, "Imbalance Response of a Squeeze Film Damper Supported Rotor," Memorias del VI Congreso Latinoamericano de Turbomaquinaria, Mexico, Mexico, pp. 89-96, November 1997.

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Effects of lubricant vapor cavitation and pressurization on SFD performance

San Andrés, L., 1996, "Theoretical and Experimental Comparisons for Damping Coefficients of a Short Length Open-End Squeeze Film Damper," ASME Journal of Engineering for Gas Turbines and Power, Vol. 118, 4, pp. 810-815, (ASME Paper 95-GT-98).

Lopez, A., L. San Andrés, and F. Baquero, 1995, “Effect of Pressurization on a Squeeze Film Damper: Experimental Results," Memorias del V Congreso Latinoamericano de Turbomaquinaria, Acapulco, Mexico, November, pp. 231-238.

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Effects of feed grooves on SFD forced performance

Arauz, G., and L. San Andrés, "Experimental Force Response of a Grooved Squeeze Film Damper," Tribology International, Vol. 30, 1, pp. 77-86, 1997.

Arauz, G., and L. San Andrés, "Experimental Study on the Effect of a Circumferential Feeding Groove on the Dynamic Force Response of a Sealed Squeeze Film Damper," ASME Journal of Tribology, Vol. 118, 4, pp. 900-905, (ASME Paper 95-Trib-50), 1996.

Arauz, G. and L. San Andrés, "Effect of a Circumferential Feeding Groove on the Force Response of a Short Squeeze Film Damper," ASME Journal of Tribology, Vol. 116, 2, pp. 369-377, (ASME Paper 93-Trib-15), 1994.

San Andrés, L., and Arauz, G., "Experimental Study of a Grooved Squeeze Film Damper," Proceedings of the III Congreso Latinoamericano de Turbomaquinaria,, Cuernavaca, Mexico, February, pp. 11-18, 1993.

San Andrés, L., and G. Arauz, "Experimental Pressures and Film Forces in a Squeeze Film Damper," ASME Journal of Tribology, Vol. 115, pp.134-140,1993

San Andrés, L., and Arauz, G., "Experimental Study of a Groove Squeeze Film Damper," Proceedings of the III Congreso Latinoamericano de Turbomaquinaria,, Cuernavaca, Mexico, February, pp. 11-18, 1993.

San Andrés, L., "Analysis of Short Squeeze Film Dampers with a Central Groove," ASME Journal of Tribology, Vol. 114, 4, pp. 659-665, 1992.

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Effect of fluid inertia and lubricant vapor cavitation on SFD performance

Robison, M., G. Arauz, and L. San Andrés, "A Test Rig for the Identification of Rotordynamic Coefficients of Fluid Film Bearings," ASME Turbo Expo'95 Land, Sea and Air Conference, Houston, ASME Paper 95-GT-431, 1995.

Sundarajan, P. S. Noah, and L. San Andrés, "Fluid Inertia Effects on the Non-Linear Response of a Rigid Rotor Supported on Squeeze Film Dampers," Proceedings of the 4th International IFToMM Rotordynamics Conference, Chicago, pp.333-340, September 1994

San Andrés, L., Meng, G. and Yoon, S., "Dynamic Force Response of an Open Ended Squeeze Film Damper," ASME Journal of Engineering for Gas Turbines and Power, Vol. 115,2, pp. 341-343, 1993.

San Andrés, L., Meng, G. and Yoon, S., "Dynamic Force Response of an Open Ended Squeeze Film Damper," ASME Journal of Engineering for Gas Turbines and Power, Vol. 115,2, pp. 341-343, 1993.

San Andrés, L., Meng, G. and Vance, J., "Experimental Measurement of the Dynamic Pressure and Force Response of a Partially Sealed Squeeze Film Damper," 13th Biennial Conference on Mechanical Vibration and Noise, Miami, FLA, Rotating Machinery and Vehicle Dynamics, ASME Publication, DE-Vol. 35, pp. 251-256, September 1991.

San Andrés, L., "Effect of Fluid Inertia on Force Coefficients for the Long Squeeze Film Damper," STLE Tribology Transactions, Vol. 31, 2, pp. 371-375, 1988.

San Andrés, L. and Vance, J., "Effect of Fluid Inertia on the Performance of Squeeze Film Damper Supported Rotors," ASME Journal of Engineering for Gas Turbine and Power, Vol. 110, 1, pp. 51-57, 1988.

San Andrés, L. and Vance, J., "Experimental Measurement of the Dynamic Pressure Distribution in a Squeeze-Film Bearing Damper Executing Circular Centered Orbits," ASLE Transactions, Vol. 30, No. 3, pp. 373-383, 1987.

San Andrés, L. and Vance, J., "Effect of Fluid Inertia on Finite Length Sealed Squeeze Film Dampers," ASLE Transactions, Vol. 30, No. 3, pp. 384-393, 1987

San Andrés, L. and Vance, J., "Effect of Fluid Inertia on Squeeze Film Damper Forces for Small Amplitude Circular Centered Motions," ASLE Transactions, Vol. 30, No. 1, pp. 69-76, 1987.

San Andrés, L. and Vance, J., "Force Coefficients for Open Ends Squeeze Film Dampers Executing Small Amplitude Motions About an Off-Centered Equilibrium Position," ASLE Transactions, Vol. 30, No. 1, pp. 63-68, 1987.

San Andrés, L. and Vance, J., "Effects of Fluid Inertia and Turbulence on the Force Coefficients for Squeeze Film Dampers," ASME Journal of Engineering for Gas Turbines and Power, Vol. 108, pp. 332-339, 1986.

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Research Progress Reports to the Turbomachinery Research Consortium (TRC):  

TRC-SFD-01-22 Measurements of the Dynamic Forced Response of an O-rings Sealed Squeeze Film Damper Supplied with a Low Supply Pressure, Rodriguez, B., and San Andrés, L., 2022

TRC-SFD-01-20 EXPERIMENTS AND MODELS FOR OPERATION OF A SEALED ENDS SQUEEZE FILM DAMPER: A STEP TOWARD QUANTIFYING AIR INGESTION IN SQUEEZE FILMS, Koo ,B., and San Andrés, L., 2020

TRC-SFD-02-20 Experimental force Coefficients in a sealed Ends SFD supplied with Lubricant through a Check Valve, Rodriguez, B., and San Andrés, L., 2020

TRC-SFD-01-19 Experimental Identification of Force Coefficients in an Integral Squeeze Film Damper and Predictive Model Validation, Lu, X, San Andrés, L.,  Koo, B., and Tran, S., 2019

TRC-SFD-01-17 Effect of Lubricant Supply Pressure on SFD Performance: Ends Sealed with O-rings and Piston Rings, San Andrés, L., Koo, B., and L. Yu, 2017

TRC-SFD-01-16 Experimental Response of an Open Ends SFD Versus a Sealed Ends SFD, Jeung, S-H., and San Andrés, L., 2016

TRC-SFD-01-15 Response of an Open Ends Squeeze Film Damper to Intermittent Impact Loads, Jeung, S-H., and San Andrés, L., 2015

 

TRC-SFD-01-14 Response of an Open Ends Squeeze Film Damper to Large Amplitude Impact Loads, Jeung, S-H., and San Andrés, L., 2014

 

TRC-SFD-01-13 On the Forced Performance of a Squeeze Film Damper Operating with Large Amplitude Orbital Motions: Measurements and Assessment of the Accuracy of the Linearized Force Coefficients

 

 TRC-SFD-01-12, Force Coefficients for a Large Clearance Open Ends SFD with a Central Feed Groove: Test Results and Predictions, San Andrés, L.,

TRC-SFD-1-08, Dynamic Performance of a Squeeze Film Damper with Non-Circular Motions: Multi-Frequency Excitations Reproducing Multi-Spool Engine Operating Conditions. Delgado, A., and San Andrés, L., 2008

TRC-Seal-1-08, A Novel FE Lubrication Model for Improved Predictions of Force Coefficients in Off-Centered Grooved Oil Seals. Delgado, A., and San Andrés, L., 2008

 

TRC-SFD-1-07, San Andrés, L., and. A. Delgado, 2007, “Parameter Identification of an End Sealed SFD: Identification of Force Coefficients and Operating Conditions Leading to Air Ingestion”.

 

TRC-SFD-2-07, San Andrés, L., and. A. Delgado, 2007, “Parameter Identification of an End Sealed SFD: Improved Predictions of Added Mass and Damping Coefficients for Grooved SFDs and Oil Seals”.

 

TRC-SFD-1-06 , San Andrés, L., and Delgado, A., 2006, "Squeeze Film Damper with Mechanical Seal: Identification of Force Coefficients from Circular Centered Orbit Tests”.

 

TRC-SFD-1-05, Delgado, A., and L. San Andrés, 2005, "Identification of Force Coefficients in a Squeeze Film Damper with a Mechanical Seal".

 

TRC-SFD-1-04, Delgado, A., and L San Andrés, 2004, “Experimental Force Coefficients for a Sealed Squeeze Film Damper – Test Rig Development”.

 

TRC-B&C-3-03, San Andrés, L., 2003, “Journal Bearing Force Coefficients under High Dynamic Loading – Experimental Results”.

 

TRC-SFD-1-02, Luis San Andrés, 2002, “Response of a Squeeze Film Damper Under High Dynamic Loading and Identification of Damping and Inertia Coefficients”.

 

TRC-SFD-1-01, San Andrés, L., 2001, “Flow Visualization and Forces from a Squeeze Film Damper Operating with Natural Air Entrainment”.

 

TRC-SFD-1-00, San Andrés, L., and O. de Santiago, 2000, “Measurements of the Imbalance Response in a Rotor Supported on Tilting Pad Bearings and Integral Squeeze Film Dampers”.

 

TRC-SFD-2-00, Beets, T., S. Diaz, and L.San Andrés, 2000,  “Pressure Measurements and Flow Visualization on a SFD Operating with a Bubbly Mixture".

 

TRC-SFD-3-00, Rodriguez, L., S. Diaz, and L. San Andrés, 2000, “Sine Sweep Load Versus Impact Excitations and their Influence on the Identification of Damping in a Bubbly Oil Squeeze Film Damper”.

TRC-SFD-1-99, De Santiago, O., and L. San Andrés, May 1999, "Design of a Series Tilting Pad Bearing and Squeeze Film Damper for NSF-TRC Rotordynamics Test Rig and Analysis for Optimum Damping at Bearing Supports".

TRC-SFD-2-99, Diaz, S., and L. San Andrés, "An Engineering Model for Prediction of Forces in SFDs and Experimental Validation for Operation with Air Entrainment,", May 1999.

TRC-SFD-1-98, De Santiago, O., and L. San Andrés, May 1998, "Imbalance Response of a Rotor Supported on Sealed Integral Dampers".

TRC-SFD-2-98, Tao, L., S. Diaz, L. San Andrés and K.R. Rajagopal, May 1998, "Flow Analysis of Squeeze Film Dampers Operating with Bubbly Lubricants".

TRC-SFD-2-97, De Santiago, O., J. Oliveras, and L. San Andrés, April 1997, "Imbalance Response of a Rotor Supported on Integral Squeeze Film Dampers".

TRC-SFD-1-97, Diaz, S. and L. San Andrés, April 1997, "Forced Response of a Squeeze Film Damper Operating with a Bubbly (Air/Oil) Mixture".

TRC-SFD-2-96, San Andrés, and D. Lubell, D., May 1996, "Unbalance Response of a Test Rotor Supported on Squeeze Film Dampers".

TRC-SFD-1-96, Diaz, S. , May 1996, "Measurements of Pressure in a Squeeze Film Damper with a Bubbly Mixture".

TRC-RD-4-95, San Andrés, L., and D. Lubell, 1995, "Overview of NSF-TRC Squeeze Film Damper Research Project, Year I".

TRC-RD-5-95, Laos, H., and L. San Andrés, May 1995, "Measurement of Unbalance Response in a SFD Test Rotor Kit, (Part II)".

TRC-SFD-1-95,  Lopez, A., and L. San Andrés, May 1995, "Test Results for an Open-End Squeeze Film Damper with a High Viscosity".

TRC-B&C-4-95, Robison, M., Walton N., and L. San Andrés, May 1995, "Experimental Force Coefficients for a Short Length Squeeze Film Damper, Experimental Force Coefficients for several a Plain Journal Bearing, Preliminary Tests for a Flexure-Pivot, Tilting Pad Journal Bearing".

TRC-SFD-4-94, San Andrés, L., Laos, H., and A. Lopez, May 1994, "Measurement of Unbalance Response in a SFD-Rotor Kit - Centered Journal".

TRC-SFD-2-91, San Andrés, L., "Dynamic Force Response of an Open Ended Squeeze Film Damper," (#119), April 1991.

TRC-SFD-3-91, San Andrés, L., "Analysis of Short Squeeze Film Dampers with a Central Groove," (#120), April 1991.

TRC-SFD-5-91, Meng, J., San Andrés, L. and Vance, J., "Experimental Investigation of the Dynamic Pressure and Force Response of a Partially Sealed Squeeze Film Damper," (#122) April 1991.

TRC-SFD-6-91, Vance, J., San Andrés, L. and Arauz, G., "Effect of Inlet Holes on the Pressure Field of a Squeeze Film Damper," (#123), April 1991.

TRC-SFD-3-90 San Andrés, L., "Experimental Results for Variable Speed TRC Squeeze Film Damper Test Rig," (#117) May 1990.

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====================== FUNDING ===========================================================================

 

$ 767,645

Pratt & Whitney Engines - SFD design space for jet engines

07/01/08-9/30/18

$172,079

National Science Foundation

Dynamic Forced Performance of Fluid Film Bearings Operating with Air Entrainment

05/01/99-05/30/02

$153,067

National Science Foundation

Dynamic Forced Response of Rotor Bearing Systems Supported on SFDs

08/01/94-12/31/97

> $500,000

Turbomachinery Research Consortium SFD Program at Texas A&M

Approximately $20-50 k/year

1990-2018

$ 35,000

Gift – Honeywell Aerospace, Phoenix

2008