This paper presents the results of an investigation to determine the effects of variational particle rebounding models on surface impacts and blade erosion patterns in gas turbines. The variance in the particle velocities after the surface impacts are modeled based on the experimental measurements using Laser-Doppler Velocimetry (LDV) under varying flow conditions. The probabilistic particle trajectory computations simulate the experimental variance in the particle restitution characteristics using cumulative distribution functions and random sampling techniques. The results are presented for the particle dynamics through a gas turbine flow field and are compared to those obtained with deterministic rebound models based on experimental mean values.

Issue Section:
Gas Turbines: Coal Utilization
Topics:
Erosion, Particulate matter, Turbomachinery, Flow (Dynamics), Gas turbines, Blades, Computation, Lasers, Particle dynamics, Trajectories (Physics)
1.
Fox, E. P., and Safie, F., 1992, “Statistical Characterization of Life Drivers for a Probabilistic Design Analysis,” AIAA Paper No. 92-3414.
2.
Hamed, A., Tabakoff, W., and Mansour, M., 1986, “Turbine Erosion Exposed to Particulate Flow,” ASME Paper No. 86-GT-258.
3.
Hamed
A.
,
1988
, “
Effect of Particle Characteristics on Trajectories and Blade Impact Patterns
,”
ASME Journal of Fluids Engineering
, Vol.
110
, pp.
33
–
37
.
4.
Hamed, A., Tabakoff, W., and Wenglarz, R., 1988, “Particulate Flow and Blade Erosion,” von Karman Institute for Fluid Dynamics Lecture Series.
5.
Hamed, A., and Tabakoff, W., 1991, “Experimental Investigation of Particle Surface Interactions for Turbomachinery Applications,” Laser Anemometry Advances and Applications, Vol. 2, Proceedings of the Fourth International Conference on Laser Anemometry, Advances and Applications, Cleveland, OH, ASME, pp. 775–780.
6.
Katsanis, T., 1965, “Fortran Program for Calculating Transonic Velocities on a Blade-to-Blade Stream Surface of a Turbomachine,” NASA TND 2809.
7.
Katsanis, T., and McNally, W. D., 1977, “Revised Fortran Program for Calculating Velocities and Streamlines on the Hub-Shroud Mid-channel Stream Surface of an Axial, Radial, or Mixed Flow Turbomachine or Annular Duct, Vols. 1 and 2,” NASA TND 8430 and NASA TND 8431.
8.
Law, A. M., and Kelton, W. D., 1991, Simulation Modeling and Analysis, McGraw-Hill, Inc., New York.
9.
McCay, L., 1973, “The Coal Burning Gas Turbine Project,” Report of the Interdepartmental Gas Turbine Steering Committee, Australian Government Publishing Service.
10.
Millwater, H. R., Smalley, A. J., Wu, Y.-T., Torng, T. Y., and Evans, B. F., 1992, “Computational Techniques for Probabilistic Analysis of Turbomachinery,” ASME Paper No. 92-GT-167.
11.
Roelke, R. J., Stabe, R. G., and Evans, D. G., 1966, “Cold-Air Performance Evaluation of Scale Model Oxidizer Pump-Drive Turbine for the M-1 Hydrogen-Oxygen Rocket Engine—II. Overall Stage Performance,” NASA TND-3368.
12.
Soong, T. T., 1981, Probabilistic Modeling and Analysis in Science and Engineering, Wiley, New York.
13.
Tabakoff, W., and Hamed, A., 1977, “Aerodynamic Effects on Erosion in Turbomachinery,” JSME & ASME Paper No. 70, presented at the Joint Gas Turbine Congress, Tokyo, Japan.
14.
Tabakoff, W., and Wakeman, T., 1979, “Test Facility for Material Erosion at High Temperature,” Erosion, Prevention and Applications, ASTM STP 664, pp. 123–135.
15.
Tabakoff
W.
,
Hamed
A.
, and
Ramachandran
J.
,
1980
, “
Study of Material Erosion in High Temperature Coal Gas Streams
,”
ASME JOURNAL OF ENGINNERING FOR POWER
, Vol.
102
, No.
2
, pp.
265
–
270
.
This content is only available via PDF.
Copyright © 1995
 by The American Society of Mechanical Engineers
You do not currently have access to this content.