RESEARCH PAPERS: Additional Technical Papers

Refinement of the Mean Streamline Method of Blade Section Design

[+] Author and Article Information
M. W. McBride

Pennsylvania State University, Applied Research Lab., State College, Pa.

J. Fluids Eng 99(3), 561-566 (Sep 01, 1977) (6 pages) doi:10.1115/1.3448847 History: Received August 11, 1976; Online October 12, 2010


The Mean Streamline Method of cascade blade section design developed by Wislicenus correlates the differences in the shape of the blade camber-line and the one-dimensional mean flow streamline. Recent effort has been directed toward the extension of this design method, to cover a wider range of loading distributions, including trailing edge loaded blades, and blades with higher than usual solidities (C/S). A computer analysis of many available blade shapes for subsonic compressors and pumps with differing loading distributions that have been tested experimentally was made. Relations between the deviation of the camber-line from the mean flow streamline as a function of the lift coefficient, solidity, a loading distribution parameter and blade stagger angle were found. Using these correlations, a computerized design method was developed which rapidly produces blade shapes with specified design characteristics. A radial equilibrium theory is utilized to compute the actual blade surface pressure distribution. When a blade is to be designed which is similar to existing designs, the method has proven very reliable.

Copyright © 1977 by ASME
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