A Three-Dimensional Axisymmetric Calculation Procedure for Turbulent Flows in a Radial Vaneless Diffuser

[+] Author and Article Information
L. F. Schumann

Propulsion Laboratory, AVSCOM Research and Technology Laboratories, Lewis Research Center, Cleveland, OH

J. Eng. Gas Turbines Power 108(1), 118-124 (Jan 01, 1986) (7 pages) doi:10.1115/1.3239857 History: Received January 07, 1985; Online October 15, 2009


An analytical model is proposed to calculate the three-dimensional axisymmetric turbulent flowfield in a radial vaneless diffuser. The model assumes that the radial and tangential boundary layer profiles can be approximated by power-law profiles. Then, using the integrated radial and tangential momentum and continuity equations for the boundary layer and corresponding inviscid equations for the core flow, there result six ordinary differential equations in six unknowns which can easily be solved using a Runge-Kutta technique. A model is also proposed for fully developed flow. The results using this technique have been compared with the results from a three-dimensional viscous, axisymmetric duct code and with experimental data and good quantitative agreement was obtained.

Copyright © 1986 by ASME
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