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Research Papers

Numerical and Experimental Analysis of the Effect of Variable Blade Row Spacing in a Subsonic Axial Turbine

[+] Author and Article Information
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 135(2), 021031 (Nov 08, 2012) (9 pages) Paper No: TURBO-11-1191; doi: 10.1115/1.4006587 History: Received August 23, 2011; Revised October 17, 2011

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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References

Moczala, M., von Lavante, E., and Parvizinia, M., 2003, “Numerical Investigation of Losses Due to Unsteady Effects in Axial Turbines,” ASME Paper No. GT-2003-38838.
Kelecy, F., Griffin, J., and Delaney, R., 1995, “The Effect of Vane-Blade Spacing on Transonic Turbine Stage Performance,” AGARD Paper No. CP-571.
Cho, J. J., Kim, K. S., Kim, J. H., and Jeong, E. H., 2006, “An Experimental Study on the Flow Characteristics of a Supersonic Turbine for the Axial Gap Ratio,” Proc. Conf. Aerosp. Propul., 2006, p. AJCPP2006-22083.
Venable, B. L., Delaney, R. A., Busby, J. A., Davis, R. L., Dorney, D. J., Dunn, M. G., Haldeman, C. W., and Abhari, R. S., 1999, “Influence of Vane-Blade Spacing on Transonic Turbine Stage Aerodynamics: Part I-Time-Averaged Data and Analysis,” J. Turbomach., 121, pp.663–672. [CrossRef]
Smith, L. H., 1966, “Wake Dispersion in Turbomachines,” ASME J. Basic Eng., 88, pp.688–689. [CrossRef]
Praisner, T., Clark, J., Nash, T., Rice, M., and Grover, E., 2006, “Performance Impacts Due to Wake Mixing in Axial-Flow Turbomachinery,” ASME Paper No. GT2006-90666.
Rose, M. G., and Harvey, N. W., 1999, “Turbomachinery Wakes: Differential Work and Mixing Losses,” ASME Paper No. 99-GT-25.
Park, J., Choi, M., and Baek, J., 2003, “Effects of Axial Gap on Unsteady Flow in One-Stage Axial Turbine,” Int. J. Turbo Jet Engines, 20, pp.315–333. [CrossRef]
Kikuchi, M., Funazaki, K., Yamada, K., and Sato, H., 2008, “Detailed Studies on Aerodynamic Performance and Unsteady Flow Behaviors of a Single Turbine Stage With Variable Rotor-Stator Axial Gap,” Int. J. Gas Turbine, Propul. Power Syst., 2, pp.30–37.
Yamada, K., Funazaki, K., Kikuchi, M., and Sato, H., 2009, “Influences of Axial Gap Between Blade Rows on Secondary Flows and Aerodynamic Performance in a Turbine Stage,” ASME Paper No. GT2009-59855.
Gaetani, P., Persico, G., Dossena, V., and Osnaghi, C., 2006, “Investigation of the Flow Field in a HP Turbine Stage for Two Stator-Rotor Axial Gaps: Part 2: Unsteady Flow Field,” ASME Paper No. GT2006-90556.
Gaetani, P., Persico, G., Dossena, V., and Osnaghi, C., 2006, “Investigation of the Flow Field in a HP Turbine Stage for Two Stator-Rotor Axial Gaps: Part 1-3D Time-Averaged Flow Field,” ASME Paper No. GT2006-90553.
Gaetani, P., Persico, G., and Osnaghi, C., 2007, “Effects of the Axial Gap on the Vane - Rotor Interaction in a HP Turbine Stage”. ISABE Paper No. ISABE-2007-1344.
Cizmas, P., Hoenninger, C., Chen, S., and Martin, H., 2001, “Influence of Inter-row Gap Value on Turbine Losses,” Int. J. Rotating Mach., 7(5), pp.335–349. [CrossRef]
van de Wall, A. G., Adamczyk, J. J., and Kadambi, J. R., 2000, “A Transport Model for the Deterministic Stresses Associated With Turbomachinery Blade Row Interactions,” J. Turbomach., 122, pp.593–603. [CrossRef]
Gier, J. E. A., 2008, “Designing Low Pressure Turbines for Optimized Airfoil Lift,” ASME Turbo Expo 2008: Land, Sea and Air GT2008, Berlin, Germany, June9–13 .
Halstead, D., Wisler, D., Okilshi, T., Walker, G., Hodson, H., and Shin, H.-W., 1997, “Boundary Layer Development in Axial Compressors and Turbines: Part 1 of 4 - Composite Picture,” J. Turbomach., 119, pp.114–127. [CrossRef]
Gostelow, J., 1977, “A New Approach to the Experimental Study of Turbomachinery Flow Phenomena,” ASME J. Eng. Power, 99, pp.97–105. [CrossRef]
Poehler, T., Gier, J., and Jeschke, P., 2010, “Numerical and Experimental Analysis of the Effects of Non-axisymmetric Contoured Stator Endwalls in an Axial Turbine,” ASME Paper No. GT2010-23350.
Walraevens, R., 2000, “Experimentelle Analyse Dreidimensionaler Instationärer Strömungseffekte in Einer 1 1/2-Stufigen Axialturbine,” Ph.D. thesis, Fortschrittsberichte VDI, Düsseldorf, VDI-Verlag.
Nuernberger, D., and Greza, H., 2003, “Numerical Investigation of Unsteady Transitional Flows in Turbomachinery Components Based on a RANS Approach,” Flow, Turbul. Combust., 69, pp. 331–353. [CrossRef]
Kügeler, E., Weber, A., and Lisiewicz, S., 2001, “Combination of a Transition Model With a Two Equation Turbulence Model and Comparison With Experimental Results,” Proceedings of the 4th European Conference on Turbomachinery, Fluid Dynamics and Thermodynamics, Associazione Termotecnica Italiana (ATI)-CST-076/01, Florence, Italy, March20–23 , pp. 877–887.
Weber, A., 2004, “3D Structured Grids for Multistage Turbomachinery Applications Based on G3DMESH,” DLR Internal Report No. 325-05-04.
Giles, M., 1990, “Nonreflecting Boundary Conditions for Euler Equation Calculations,” AIAA J., 28, pp.2050–2058. [CrossRef]
Yang, H., Nuernberger, D., Nicke, E., and Weber, A., 2003, “Numerical Investigation of Casing Treatment Mechanisms With a Conservative Mixed-Cell Approach,” ASME Paper No. GT2003-38483.
Kozulovic, D., Roeber, T., and Nuernberger, D., 2007, “Application of a Multimode Transition Model to Turbomachinery Flows,” Proceedings of the 7th European Turbomachinery Conference, ETC., Athens, Greece, March5–7 ,
Clark, J., and Grover, E., 2007, “Assessing Convergence in Predictions of Periodic-Unsteady Flowfields,” J. Turbomach., 129, pp.740–749. [CrossRef]
Greitzer, E. M., 1984, “Unsteady Flows in Turbomachines,” Lecture Series 1984-02.
Horlock, J. H., and Lakshminarayana, B., 1973, “Secondary Flows: Theory, Experiment, and Application in Turbomachinery Aerodynamics,” Annu. Rev. Fluid Mech., 5(1), pp.247–280. [CrossRef]
Persico, G., Gaetani, P., Dossena, V., D'Ippolito, G., and Osnaghi, C., 2009, “On the Definition of the Secondary Flow in Three-Dimensional Cascades,” Proc. Inst. Mech. Eng., Part A, 223, pp.667–676. [CrossRef]
Denton, J. D., 1993, “Loss Mechanisms in Turbomachines,” J. Turbomach., 115, pp.621–656. [CrossRef]
von Hoyningen-Huene, M., and Hermeler, J., 1999, “Time-Resolved Numerical Analysis of the 2-D Aerodynamics in the First Stage of an Industrial Gas Turbine for Different Vane-Blade Spacings,” ASME Paper No. 1999-GT-102.

Figures

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Fig. 1

Side view of turbine test rig

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Fig. 2

Measurement planes and blading

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Fig. 3

Probes used for the traverse plane investigations

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Fig. 4

Measurement grid in S3 plane

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Fig. 5

Computational domain for one passage per blade row at midspan

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Fig. 6

Radial distribution of measured inflow profile

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Fig. 7

CFD-predicted overall performance

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Fig. 8

Axial growth of losses over entire turbine

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Fig. 9

Streamlines on rotor blade colored by entropy

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Fig. 10

Second stator suction side without LE1 wake

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Fig. 11

Second stator suction side with LE1 wake

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Fig. 12

Radial distribution mass-averaged absolute streamwise vorticity in MP3

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Fig. 13

Measured turbine operating map

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Fig. 14

Comparison of CFD and experimental data

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Fig. 15

Time-averaged Mach number downstream the rotor

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Fig. 16

RMS turbulence downstream the second stator

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Fig. 17

Simulation results for the 2D calculation

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