Compressibility Effects in Electrochemical Machining

[+] Author and Article Information
F. Fluerenbrock, R. D. Zerkle, J. F. Thorpe

Department of Mechanical Engineering, Univ. of Cincinnati, Cincinnati, Ohio

J. Eng. Ind 98(2), 423-430 (May 01, 1976) (8 pages) doi:10.1115/1.3438892 History: Received March 21, 1974; Online July 15, 2010


Based on bubbly two-phase flow an equation for the speed of sound in the ECM frontal gap is derived, and it is seen that the sonic speed is well within reach of the electrolyte velocities usually encountered in ECM. Thus the Mach number can become equal to one, which represents a choking condition. The practical significance of the choking phenomenon and other compressibility effects are discussed, and experimental data are presented. An explanation for the flow lines or striations frequently observed with radial outflow configurations is also given.

Copyright © 1976 by ASME
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