Research Papers

On the Necessity of Unsteady Flow in Fluid Machines

[+] Author and Article Information
Robert C. Dean, Jr.

Advanced Engineering Department, Ingersoll-Rand Company, Phillipsburg, N. J.

J. Basic Eng 81(1), 24-28 (Mar 01, 1959) (5 pages) doi:10.1115/1.4008350 History: Received April 24, 1958; Published March 01, 1959; Online February 20, 2019


It is shown that work can be done on, or by, a fluid in a frictionless flow process only if the flow is unsteady. The implications of this conclusion in the analysis of fluid machinery, and provisions which must be made in analysis to account for unsteady flow, are discussed.

Copyright © 1959 by ASME
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