Pressure Attenuation in Long Rarefaction Wave Tubes

[+] Author and Article Information
M. J. Levy, H. Gerecke

Department of Mechanical Engineering, Newark College of Engineering, Newark, N. J.

J. H. Potter

Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, N. J.

J. Eng. Ind 91(2), 497-500 (May 01, 1969) (4 pages) doi:10.1115/1.3591608 History: Received July 17, 1968


This paper reports upon an experimental investigation of gas dynamic rarefaction waves in rarefaction wave tubes to determine effects of large length to diameter ratios. A fitted equation is presented from which reasonable predictions can be made on the pressure deviation between a real and an ideal rarefaction wave. Transient boundary-layer effects cause an attenuation of the pressure which becomes more pronounced as the length to diameter ratio is increased. At a length to diameter ratio of 895, the pressure damping was essentially complete in one cycle for initial pressure ratios in excess of 1.6.

Copyright © 1969 by ASME
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