Laser Measurements of Fly Ash Rebound Parameters for Use in Trajectory Calculations

[+] Author and Article Information
W. Tabakoff, M. F. Malak

Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, OH 45221

J. Turbomach 109(4), 535-540 (Oct 01, 1987) (6 pages) doi:10.1115/1.3262144 History: Received January 07, 1985; Online November 09, 2009


This paper describes an experimental method used to find particle restitution coefficients. The equations that govern the motion of solid particles suspended by a compressible gas flow through a turbomachine depend on the restitution coefficients. Analysis of the data obtained by a laser-Doppler velocimeter (LDV) system of the collision phenomenon gives the restitution ratios as a function of the incidence angle. From these ratios, the particle velocity components after collision are computed and used as the initial conditions to the solution of the governing equations of motion for particle trajectories. The erosion of metals impacted by small dust particles can be calculated by knowing the restitution coefficients. The alloy used in this investigation was 410 stainless steel.

Copyright © 1987 by ASME
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