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RESEARCH PAPERS

Improved Particle Trajectory Calculations Through Turbomachinery Affected by Coal Ash Particles

[+] Author and Article Information
B. Beacher, W. Tabakoff, A. Hamed

Department of Aerospace Engineering and Applied Mathematics, University of Cincinnati, Cincinnati, Ohio

J. Eng. Power 104(1), 64-68 (Jan 01, 1982) (5 pages) doi:10.1115/1.3227267 History: Received December 09, 1980; Online September 28, 2009

Abstract

Trajectories of small coal ash particles encountered in coal-fired gas turbines are calculated with an improved computer analysis currently under development. The analysis uses an improved numerical grid and mathematical spline-fitting techniques to account for three-dimensional gradients in the flow field and blade geometry. The greater accuracy thus achieved in flow field definition improves the trajectory calculations over previous two-dimensional models by allowing the small particles to react to radial variations in the flow properties. A greater accuracy thus achieved in the geometry definition permits particle rebounding in a plane perpendicular to the blade and flow path surfaces rather than in a two-dimensional plane. The improved method also accounts for radial variations in airfoil chord, stagger, and blade thickness when computing particle impact at a blade location.

Copyright © 1982 by ASME
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