Evaluating the Influence of Rotor-Casing Eccentricity on Turbine Efficiency Including Time-Resolved Flow Field Measurements

DeShong, Eric T.; Siroka, Shawn; Berdanier, Reid A.; Thole, Karen A.

doi:10.1115/1.4052318

Evaluating the Influence of Rotor-Casing Eccentricity on Turbine Efficiency Including Time-Resolved Flow Field Measurements

Journal Article · Fri Oct 01 04:00:00 EDT 2021 · Journal of Turbomachinery

DOI:https://doi.org/10.1115/1.4052318· OSTI ID:1980673

DeShong, Eric T. ^[1]; Siroka, Shawn; Berdanier, Reid A.; Thole, Karen A.

OSTI

Abstract

The clearance that exists between the casing and turbine blade tips is one of the key drivers of efficiency in gas turbine engines. For this reason, engine manufacturers utilize precise manufacturing techniques and may use clearance control systems to minimize tip clearances to reduce associated losses. Despite these efforts, turbines typically exhibit some nominal casing ovality or rotor-casing eccentricity, and changes to blade tip clearance during operation commonly occur due to thermal and mechanical stresses. The present study investigates non-axisymmetric tip clearance effects by creating a rotor-casing eccentricity in a one-stage axial test turbine operating in a continuous-duration mode at engine-relevant conditions with engine representative hardware. A magnetic levitation bearing system was leveraged to move the turbine shaft to vary the rotor-casing eccentricity without test section disassembly. The results of this study indicate that rotor-casing eccentricity does not affect overall turbine efficiency over the range that was tested, but does locally influence efficiency and the rotor exit flow field. Comparisons of flow angle and secondary flow kinetic energy (SKE) agreed with previous studies and existing analytical methods, respectively. Collectively, these results indicate that tip clearance can be studied locally on an eccentric rotor.

Research Organization:: Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE)

DOE Contract Number:: FE0031288

OSTI ID:: 1980673

Journal Information:: Journal of Turbomachinery, Journal Name: Journal of Turbomachinery Journal Issue: 2 Vol. 144; ISSN 0889-504X

Publisher:: ASME

Country of Publication:: United States

Language:: English

References (25)

Predicted Combined Effects of Purge Flow and Rotor-Casing Eccentricity on Ingress Heating Guo, Zhou; Rhode, David L. Journal of Propulsion and Power, Vol. 15, Issue 3 https://doi.org/10.2514/2.5448	journal	May 1999
Active Suppression of Rotating Stall and Surge in Axial Compressors Day, I. J. Journal of Turbomachinery, Vol. 115, Issue 1 https://doi.org/10.1115/1.2929216	journal	January 1993
The Measurement and Formation of Tip Clearance Loss Bindon, J. P. Journal of Turbomachinery, Vol. 111, Issue 3 https://doi.org/10.1115/1.3262264	journal	July 1989
The Effect of Tip Clearance on the Development of Loss Behind a Rotor and a Subsequent Nozzle Kaiser, I.; Bindon, J. P. Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery https://doi.org/10.1115/97-GT-053	conference	June 1997
Investigation of the Flow Field in a High-Pressure Turbine Stage for Two Stator-Rotor Axial Gaps—Part II: Unsteady Flow Field Gaetani, P.; Persico, G.; Dossena, V. Journal of Turbomachinery, Vol. 129, Issue 3 https://doi.org/10.1115/1.2472393	journal	July 2006
Evaluating the Effects of Transient Purge Flow on Stator-Rotor Seal Performance Berdanier, Reid A.; DeShong, Eric T.; Thole, Karen A. Journal of Turbomachinery, Vol. 143, Issue 2 https://doi.org/10.1115/1.4048023	journal	February 2021
Protecting Turbomachinery From Self-Excited Rotor Whirl Alford, J. S. Journal of Engineering for Power, Vol. 87, Issue 4 https://doi.org/10.1115/1.3678270	journal	October 1965
Effects of Tip Clearance and Casing Recess on Heat Transfer and Stage Efficency in Axial Turbines Ameri, A. A.; Steinthorsson, E.; Rigby, D. L. Journal of Turbomachinery, Vol. 121, Issue 4 https://doi.org/10.1115/1.2836720	journal	October 1999
The Performance of a Low Speed One and a Half Stage Axial Turbine With Varying Rotor Tip Clearance and Tip Gap Geometry Morphis, G.; Bindon, J. P. Volume 1: Turbomachinery https://doi.org/10.1115/94-GT-481	conference	June 1994
Effects of Purge Flow Configuration on Sealing Effectiveness in a Rotor–Stator Cavity Clark, Kenneth; Barringer, Michael; Johnson, David Journal of Engineering for Gas Turbines and Power, Vol. 140, Issue 11 https://doi.org/10.1115/1.4040308	journal	July 2018
Measurement of Turbine Blade-Tip Rotordynamic Excitation Forces Martinez-Sanchez, M.; Jaroux, B.; Song, S. J. Journal of Turbomachinery, Vol. 117, Issue 3 https://doi.org/10.1115/1.2835673	journal	July 1995
The Design of a Steady Aero Thermal Research Turbine (START) for Studying Secondary Flow Leakages and Airfoil Heat Transfer Barringer, Michael; Coward, Andrew; Clark, Ken ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, Volume 5C: Heat Transfer https://doi.org/10.1115/GT2014-25570	conference	September 2014
Experimental Measurement of Alford’s Force in Axial Flow Turbomachinery Vance, J. M.; Laudadio, F. J. Journal of Engineering for Gas Turbines and Power, Vol. 106, Issue 3 https://doi.org/10.1115/1.3239610	journal	July 1984
Performance Estimation of Axial Flow Turbines Craig, H. R. M.; Cox, H. J. A. Proceedings of the Institution of Mechanical Engineers, Vol. 185, Issue 1 https://doi.org/10.1243/PIME_PROC_1970_185_048_02	journal	June 1970
Averaging Nonuniform Flow for a Purpose Cumpsty, N. A.; Horlock, J. H. Journal of Turbomachinery, Vol. 128, Issue 1 https://doi.org/10.1115/1.2098807	journal	February 2005
Unsteady, 3-Dimensional Flow Measurement Using a Miniature Virtual 4 Sensor Fast Response Aerodynamic Probe (FRAP) Pfau, A.; Schlienger, J.; Kalfas, A. I. Volume 1: Turbo Expo 2003 https://doi.org/10.1115/GT2003-38128	conference	January 2003
Axial Turbine Blade Tips: Function, Design, and Durability Bunker, Ronald S. Journal of Propulsion and Power, Vol. 22, Issue 2 https://doi.org/10.2514/1.11818	journal	March 2006
Rotordynamic Forces Due to Turbine Tip Leakage: Part II—Radius Scale Effects and Experimental Verification Song, S. J.; Martinez-Sanchez, M. Journal of Turbomachinery, Vol. 119, Issue 4 https://doi.org/10.1115/1.2841180	journal	October 1997
The Effect of Clearance on Shrouded and Unshrouded Turbines at Two Levels of Reaction Yoon, Sungho; Curtis, Eric; Denton, John Journal of Turbomachinery, Vol. 136, Issue 2 https://doi.org/10.1115/1.4023942	journal	September 2013
Time-resolved flow measurements with fast-response aerodynamic probes in turbomachines Kupferschmied, Peter; Köppel, Pascal; Gizzi, William Measurement Science and Technology, Vol. 11, Issue 7 https://doi.org/10.1088/0957-0233/11/7/318	journal	June 2000
Flow Field in the Tip Gap of a Planar Cascade of Turbine Blades Yaras, M.; Zhu, Yingkang; Sjolander, S. A. Journal of Turbomachinery, Vol. 111, Issue 3 https://doi.org/10.1115/1.3262266	journal	July 1989
Turbine Engine Clearance Control Systems: Current Practices and Future Directions Lattime, Scott; Steinetz, Bruce 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit https://doi.org/10.2514/6.2002-3790	conference	June 2012
Rotordynamic Forces Due to Turbine Tip Leakage: Part I—Blade Scale Effects Song, S. J.; Martinez-Sanchez, M. Journal of Turbomachinery, Vol. 119, Issue 4 https://doi.org/10.1115/1.2841179	journal	October 1997
Methods of Predicting the Tip Clearance Effects in Axial Flow Turbomachinery Lakshminarayana, B. Journal of Basic Engineering, Vol. 92, Issue 3 https://doi.org/10.1115/1.3425036	journal	September 1970
Control of Rotor Tip Leakage Through Cooling Injection From the Casing in a High-Work Turbine Behr, Thomas; Kalfas, Anestis I.; Abhari, Reza S. Journal of Turbomachinery, Vol. 130, Issue 3 https://doi.org/10.1115/1.2777185	journal	May 2008

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