Numerical and experimental investigations have been performed to determine the effect of a variation of the interblade row axial gap on turbine efficiency. The geometry used in this study is the 1.5-stage axial flow turbine rig of the Institute of Jet Propulsion and Turbomachinery at Rhejnisch Westfalische Technische Hochshule (RWTH) Aachen University. The influence of the blade row spacing on aerodynamics has been analyzed by conducting steady and unsteady Reynolds-averaged Navier-Stokes (RANS) simulations as well as measurements in the cold air turbine test rig of the Institute. Both potential and viscous flow interactions, including secondary flow, were investigated. The results show an aerodynamic improvement of efficiency and favorable spatial distribution of secondary kinetic energy by reduction of the axial gap.
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March 2013
Research-Article
Numerical and Experimental Analysis of the Effect of Variable Blade Row Spacing in a Subsonic Axial Turbine
M. Restemeier,
M. Restemeier
1
e-mail: restemeier@ist.rwth-aachen.de
1Address all correspondence to this author.
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P. Jeschke,
P. Jeschke
Institute of Jet Propulsion and Turbomachinery
,RWTH Aachen University
,Aachen 52062
, Germany
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J. Gier
J. Gier
MTU Aero Engines
,Dachauer Strasse 665
,80955 Munich
, Germany
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M. Restemeier
e-mail: restemeier@ist.rwth-aachen.de
P. Jeschke
Institute of Jet Propulsion and Turbomachinery
,RWTH Aachen University
,Aachen 52062
, Germany
J. Gier
MTU Aero Engines
,Dachauer Strasse 665
,80955 Munich
, Germany
1Address all correspondence to this author.
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received August 23, 2011; final manuscript received October 17, 2011; published online November 8, 2012. Editor: David Wisler.
J. Turbomach. Mar 2013, 135(2): 021031 (9 pages)
Published Online: November 8, 2012
Article history
Received:
August 23, 2011
Revision Received:
October 17, 2011
Citation
Restemeier, M., Jeschke, P., Guendogdu, Y., and Gier, J. (November 8, 2012). "Numerical and Experimental Analysis of the Effect of Variable Blade Row Spacing in a Subsonic Axial Turbine." ASME. J. Turbomach. March 2013; 135(2): 021031. https://doi.org/10.1115/1.4006587
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