Piston Vibration in Piston-Cylinder Systems

[+] Author and Article Information
I. Etsion, M. Magen

Department of Mechanical Engineering, Technion—Israel Institute of Technology, Haifa, Israel

J. Fluids Eng 102(1), 26-33 (Mar 01, 1980) (8 pages) doi:10.1115/1.3240620 History: Received June 27, 1979; Online October 26, 2009


The motion of a cylindrical piston falling in a liquid filled vertical cylinder is analyzed. It is found that concentric motion is impossible and that flow induced vibration is always associated with such piston-cylinder systems. If the clearance over radius ratio is larger than a certain critical value, βcr , severe wobble and piston-cylinder contact occurs. For clearance over radius ratio less than βcr stable periodical oscillation with a constant amplitude takes place and the piston never contacts the cylinder wall. Reasonable agreement is achieved between the theoretical results and previous experimental observation.

Copyright © 1980 by ASME
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