A Study of the Viscous and Nonadiabatic Flow in Radial Turbines

[+] Author and Article Information
I. Khalil, W. Tabakoff

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

J. Eng. Power 103(3), 481-489 (Jul 01, 1981) (9 pages) doi:10.1115/1.3230746 History: Received January 03, 1980; Online September 28, 2009


A method for analyzing the viscous nonadiabatic flow within turbomachine rotors is presented. The field analysis is based upon the numerical integration of the incompressible Navier-Stokes equations together with the energy equation over the rotors blade-to-blade stream channels. The numerical code used to solve the governing equations employs a nonorthogonal boundary fitted coordinate system that suits the most complicated blade geometries. Effects of turbulence are modeled with two equations; one expressing the development of the turbulence kinetic energy and the other its dissipation rate. The method of analysis is applied to a radial inflow turbine. The solution obtained indicates the severity of the complex interaction mechanism that occurs between different flow regimes (i.e., boundary layers, recirculating eddies, separation zones, etc.). Comparison with nonviscous flow solutions tend to justify strongly the inadequacy of using the latter with standard boundary layer techniques to obtain viscous flow details within turbomachine rotors. Capabilities and limitations of the present method of analysis are discussed.

Copyright © 1981 by ASME
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