Transient Effects in the Discharge of Compressed Air From a Cylinder Through an Orifice

[+] Author and Article Information
B. E. L. Deckker, Y. F. Chang

Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

J. Basic Eng 90(3), 333-341 (Sep 01, 1968) (9 pages) doi:10.1115/1.3605102 History: Received February 06, 1968; Online November 03, 2011


The transient nature of the flow through square-edge orifices during discharge from a cylinder and the accompanying expansion of the air have been examined in systematic experiments based on dimensional considerations. It has been found that the expansion of the air in the cylinder is not adiabatic. The effects due to heat transfer to the air, to orifice geometry, and to fluid dynamical quantities on the flow through an orifice have been examined separately. The results obtained under transient conditions are compared with steady flows for which the upstream conditions are similar.

Copyright © 1968 by ASME
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