Hydraulic Fluidics

[+] Author and Article Information
L. R. Kelley, W. A. Boothe

General Electric Co., Corporate Research and Development, Schenectady, N. Y.

J. Dyn. Sys., Meas., Control 95(2), 161-166 (Jun 01, 1973) (6 pages) doi:10.1115/1.3426673 History: Received March 12, 1973; Online July 13, 2010


Fluidic technology is equally applicable to liquid and gaseous operation, yet the bulk of the literature to date is concerned with the latter. This paper describes some of the unique effects encountered in fluidic devices for hydraulic operation, and compares air operation to hydraulic oil operation in several critical respects including potential response, power consumption, and Reynolds number. Test data on oil operated hydraulic elements show a high dependency on Reynolds number in the lower pressure and temperature regions. Gain as a function of Reynolds number and aspect ratio is presented. An effective means for correlating data to a modified Reynolds number is shown. Dynamic performance test results are also shown, and agree quite well with predictions based on lumped parameter analysis. The use of operational oil elements in specific open and closed-loop circuits is also described.

Copyright © 1973 by ASME
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