Turbomachinery Wakes: Differential Work and Mixing Losses

[+] Author and Article Information
M. G. Rose, N. W. Harvey

Turbine Systems, Rolls-Royce plc, Derby, United Kingdom

J. Turbomach 122(1), 68-77 (Feb 01, 1999) (10 pages) doi:10.1115/1.555429 History: Received February 01, 1999
Copyright © 2000 by ASME
Your Session has timed out. Please sign back in to continue.


Denton, J. D., and Cumpsty, N. A., 1987, “Loss Mechanisms in Turbomachines,” I. Mech. E C260/87.
Denton,  J. D., 1993, “Loss Mechanisms in Turbomachines,” ASME J. Turbomach., 115, pp. 621–656.
Carscallen,  W. E., Currie,  T. C., Hogg,  S. I., and Gostelow,  J. P., 1999, “Measurement and Computation of Energy Separation in the Vortical Wake Flow of a Turbine Nozzle Cascade,” ASME J. Turbomach., 121, pp. 703–708.
Hartsel, J. E., 1972, “Prediction of Effects of Mass-Transfer Cooling on the Blade-Row Efficiency of Turbine Aerofoils,” AIAA 10th ASM, San Diego, Jan.
Banieghbal, M. R., Curtis, E. M., Denton, J. D., Hodson, H. P., Huntsman, I., Schulte, V., Harvey, N. W., and Steele, A. B., 1995, “Wake Passing in LP Turbine Blades,” AGARD PEP 85th Symp., CP-571.
Schröder, Th., 1991, “Investigations of Blade Row Interaction and Boundary Layer Transition Phenomena in a Multistage Aero Engine Low-Pressure Turbine by Measurements With Hot-Film Probes and Surface Mounted Hot-Film Gauges,” Von Karman Institute for Fluid Dynamics, LS 1991-06.
Walraevens, R. E., and Gallus, H. E., 1995, “Stator–Rotor–Stator Interaction in an Axial Flow Turbine and Its Influence on Loss Mechanisms,” AGARD PEP 85th Symp., CP-571.
Moss, R. W., Ainsworth, R. W., Sheldrake, C. D., and Miller, R., 1997, “The Unsteady Pressure Field Over a Turbine Blade Surface: Visualization and Interpretation of Experimental Data,” ASME Paper No. 97-GT-474.
Hodson,  H. P., and Dawes,  W. N., 1998, “On the Interpretation of Measured Profile Losses in Unsteady Wake-Turbine Blade Interaction Studies,” ASME J. Turbomach., 120, pp. 276–284.
Kerrebrock,  J. L., and Mikolajczak,  A. A., 1970, “Intra Stator Transport of Rotor Wakes and its Effect on Compressor Performance,” ASME J. Eng. Power, 92, pp. 359–368.
Van Zante, D. E., Adamczyk, J. J., Strasizar, A. J., and Okiishi, T. H., 1997, “Wake Recovery Performance Benefit in a High-Speed Axial Compressor,” ASME Paper No. 97-GT-535.
Valkov,  T. V., and Tan,  C. S., 1999, “Effect of Upstream Rotor Vortical Disturbances on the Time-Averaged Performance of Axial Compressor Stators: Part 2—Rotor Tip Vortex/Streamwise Vortex-Stator Blade Interactions,” ASME J. Turbomach., 121, pp. 387–397.
Shapiro, A. H., 1953, The Dynamics and Thermodynamics of Compressible Fluid Flow, Wiley, New York.
Gwilliam, N. J., and Kingston, T. R., 1998, “Advanced Computational Fluid Dynamics in the Design of Military Turbines,” R.T.O. Symposium “Design Principles and Methods for Gas Turbine Engines,” Toulouse, May, Paper No. 32.
Lewis, K. L., 1993, “The Aerodynamics of Shrouded Multistage Turbines,” PhD. Thesis, Cambridge University, Nov.
Denton, J. D., 1997, “UNSTREST Code,” private communication.


Grahic Jump Location
Simple wake mixing model with acceleration before mixing 2
Grahic Jump Location
Effect of acceleration on mixing loss
Grahic Jump Location
Simple differential work extraction model
Grahic Jump Location
Classical turbomachinery velocity triangles for free stream and wake
Grahic Jump Location
Variation of differential work coefficient μ as wake total temperature and total pressure are varied for an HP turbine example
Grahic Jump Location
Absolute total temperature rotor inlet and exit
Grahic Jump Location
Absolute total pressure rotor inlet and exit
Grahic Jump Location
NGV midheight exit entropy distribution from UNSTREST
Grahic Jump Location
Midheight entropy at rotor exit instantaneous picture from UNSTREST solution
Grahic Jump Location
Lost turbine efficiency due to NGV wake mixing loss predicted from simple model
Grahic Jump Location
Percentage change in entropy rise due to mixing with and without rotor work
Grahic Jump Location
Velocity triangles for compressor case wake and free stream
Grahic Jump Location
Variation of μ as the total pressure of the stator wakes is varied
Grahic Jump Location
Change in the stator wake mixing loss due to differential work extraction for a multistage compressor stage
Grahic Jump Location
One-dimensional compressible wake mixing sum
Grahic Jump Location
Two-dimensional compressible wake mixing sum




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In