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RESEARCH PAPERS

Dynamic Response of Fluid Lines

[+] Author and Article Information
A. F. D’Souza

School of Mechanical Engineering, Automatic Control Center, Purdue University, Lafayette, Ind.

R. Oldenburger

Automatic Control Center, Purdue University, Lafayette, Ind.

J. Basic Eng 86(3), 589-598 (Sep 01, 1964) (10 pages) doi:10.1115/1.3653180 History: Received July 22, 1963; Online November 03, 2011

Abstract

The use of hydraulic transmission lines in automatic control, liquid-propellant rocket, and other systems requires accurate knowledge of their dynamic response. In this paper the effects of fluid viscosity and compressibility are included to derive transfer functions relating the pressure and velocity variables at the two cross sections of a line. The results of theoretical analysis are compared with experimental data obtained from frequency-response tests. The analysis includes the significant effect on the dynamic response caused by the natural frequency of vibration of the line in the longitudinal direction. It is shown that in small-diameter lines the viscous effects cannot be neglected. The theoretical analysis may be used to improve the performance of systems incorporating hydraulic networks.

Copyright © 1964 by ASME
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