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RESEARCH PAPERS

An Approximate Three-Dimensional Aerodynamic Design Method for Centrifugal Impeller Blades

[+] Author and Article Information
Zhao Xiaolu, Qin Lisen

Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China

J. Turbomach 112(1), 44-49 (Jan 01, 1990) (6 pages) doi:10.1115/1.2927419 History: Received January 13, 1989; Online June 09, 2008

Abstract

An aerodynamic design method, which is based on the Mean Stream Surface Method (MSSM), has been developed for designing centrifugal compressor impeller blades. As a component of a CAD system for centrifugal compressor, it is convenient to use the presented method for generating impeller blade geometry, taking care of manufacturing as well as aerodynamic aspects. The design procedure starts with an S2m indirect solution. Afterward from the specified S2m surface, by the use of Taylor series expansion, the blade geometry is generated by straight-line elements to meet the manufacturing requirements. Simultaneously, the fluid dynamic quantities across the blade passage can be determined directly. In terms of these results, the designer can revise the distribution of angular momentum along the shroud and hub, which are associated with blade loading, to get satisfactory velocities along the blade surfaces in order to avoid or delay flow separation.

Copyright © 1990 by The American Society of Mechanical Engineers
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