0
TECHNICAL PAPERS

Unsteady Transport Mechanisms in an Axial Turbine

[+] Author and Article Information
Claudia Casciaro, Martin Treiber, Michael Sell

Turbomachinery Laboratory, Institute of Energy Technology, Swiss Federal Institute of Technology, 8092 Zurich, Switzerland

J. Turbomach 122(4), 604-612 (Feb 01, 2000) (9 pages) doi:10.1115/1.1290398 History: Received February 01, 2000
Copyright © 2000 by ASME
Your Session has timed out. Please sign back in to continue.

References

Dean,  R. C., 1959, “On the Necessity of Unsteady Flow in Fluid Machines,” ASME J. Basic Eng., 82, pp. 24–28.
Boletis,  E., and Sieverding,  C. H., 1991, “Experimental Study of the Three-Dimensional Flow Field in a Turbine Stator Preceded by a Full Stage,” ASME J. Turbomach., 113, pp. 1–8.
Funazaki, K., Tetsuka, N., and Tanuma, T., 1997, “Experimental Studies on Unsteady Aerodynamic Loss of a High-Pressure Turbine Cascade,” ASME Paper No. 97-GT-52.
Schulte,  V., and Hodson,  H. P., 1998, “Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines,” ASME J. Turbomach., 120, pp. 28–35.
Sharma,  O. P., Picket,  G. F., and Ni,  R. H., 1992, “Assessment of Unsteady Flows in Turbines,” ASME J. Turbomach., 114, pp. 79–90.
Epstein, A. H., Giles, M. B., Shang, T., and Sehra, A. K., 1989, “Blade Row Interaction Effects on Compressor Measurements,” Unsteady Aerodynamic Phenomena in Turbomachines, AGARD-CP-468, pp. 14.1–14.11.
Meyer,  R. X., 1958, “The Effect of Wakes on the Transient Pressure and Velocity Distributions in Turbomachines,” Trans. ASME , 80, pp 1544–1552.
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. 359–370.
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.
Gallus, H. E., Zeschky, J., and Hah, C., 1994, “Endwall and Unsteady Flow Phenomena in an Axial Turbine Stage,” ASME Paper No. 94-GT-143.
McFarland, V. E., and Tiederman, W. G., 1992, “Viscous Interaction Upstream and Downstream of a Turbine Stator Cascade with a Periodic Wake Field,” ASME Paper No. 92-GT-162.
Eckert,  E. R. G., 1986, “Energy Separation in Fluid Stream,” Int. Commun. Heat Mass Transfer, 13, pp. 127–143.
Baehr, H. D., 1989, Thermodynamik, Springer-Verlag, Berlin.
Callen, H. B., 1960, Thermodynamics, Wiley, New York.
Casciaro, C., Sell, M., and Gyarmathy, G., 1998, “Towards Reliable Computations for a Subsonic Turbine,” Proc. Symposium on Verification of Design Methods by Test and Analysis, London, UK, Paper No. 15.
Casciaro, C., 1999, “A Numerical Analysis of Viscous Blade/Row Interactions in Axial-flow Turbines,” Ph.D. thesis No. 13478, ETH, Zurich, Switzerland.
Casciaro, C., Sell, M., Treiber, M., and Gyarmathy, G., 1999, “Vortex Interaction and Breakdown Phenomena in an Axial Turbine,” Computational Technologies for Fluid/Thermal/Chemical Systems With Industrial Applications, Vol. II, ASME PVP-Vol. 28, p. 155.
Dullenkopf, K., 1992, “Untersuchungen zum Einfluβ periodisch instationärer Nachlauf-strömungen auf den Wärmeübergang konvektiv gekühlter Gasturbinenschaufeln,” Ph.D. thesis, Universität Karlsruhe, Germany.
Casartelli, E., 1999, “Dreidimensionale Diffusorströmung im Radialverdichter, numerisch untersuch,” Ph.D. thesis No. 13056, ETH, Zurich, Switzerland.
Rose,  M. G., and Harvey,  N. W., 2000, “Turbomachinery Wakes: Differential Work and Mixing Losses,” ASME J. Turbomach., 122, pp. 68–77.
VKI Lecture Series 1998-08, 1998, “Blade Row Interference Effects in Axial Turbomachinery Stages,” Von Karman Institute for Fluid Dynamics.

Figures

Grahic Jump Location
Negative jet in relative frame of reference
Grahic Jump Location
Error made by considering average velocity instead of undisturbed velocity
Grahic Jump Location
Configurations and block topologies
Grahic Jump Location
Details of pin (a) and leading edge (b) grids or two-dimensional computations (from topology in Fig. 3). Outlet grid (c) for three-dimensional cases (same topology). Figures not to same scale.
Grahic Jump Location
Axial velocity: comparison of computed and theoretical values, expected with Dullenkopf’s model, for PIN1
Grahic Jump Location
Negative jet at midspan for PIN2
Grahic Jump Location
Schematics of negative jet feeding mechanisms
Grahic Jump Location
Absolute vectors near leading edge over one period for PIN2
Grahic Jump Location
Static pressure coefficient versus nondimensionalized time at midspan (three periods are represented)
Grahic Jump Location
Absolute total pressure contours for PIN1 (above) and PIN2 (below)
Grahic Jump Location
Absolute total pressure coefficient at midspan 1/6th axial chord downstream of trailing edge
Grahic Jump Location
Total temperature for PIN1 at midspan at 23/30T
Grahic Jump Location
Quiescent zones (as isosurfaces for 1 percent of averaged unsteady velocity field) near wall on suction side at 12/30T and pressure side 29/20T for PIN1. In the top picture a cut at 1/4 can also be seen, with unsteady velocity field, showing incoming wake shape.
Grahic Jump Location
Time-averaged absolute total pressure coefficient at 1/6th axial chord downstream of trailing edge (top) and static pressure coefficient on suction side (bottom) for PIN1 (a) and steady-state computation (b)

Tables

Errata

Discussions

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