Matching of Turbocomponents Described by the Example of Impeller and Diffuser in a Centrifugal Compressor: Part I—Aerothermodynamic Coupling of Impeller and Diffuser. Part II—Optimized Stage Efficiency of a Centrifugal Compressor

[+] Author and Article Information
K. Bammert, M. Rautenberg

Institute for Turbomachinery, University of Hannover, Hannover, Germany

W. Wittekindt

Head of Design and Development Department, Turbocompressors, Klein, Schanzlin and Becker AG, Saarbrücken, Germany

J. Eng. Power 102(3), 594-600 (Jul 01, 1980) (7 pages) doi:10.1115/1.3230308 History: Received April 10, 1979; Online September 28, 2009


An important task in the design of turbo machinery is the determination of the aerothermodynamic parameters necessary to assure optimum matching of the individual compressor components. With centrifugal compressors, the problem is to design impeller and diffuser such that a maximum overall efficiency is achieved for the desired design point. For this purpose, a mathematical model is developed coupling the individual component efficiencies. In the first part of this paper, the aerothermodynamic bases are derived and the coupling equation is illustrated. In the second part, a solution is displayed for the complex problem of matching the impeller and the vaneless diffuser of a centrifugal compressor. The solution is obtained by means of a stochastic-mathematical optimization procedure based on the biological evolution strategy.

Copyright © 1980 by ASME
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