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Cavitation Inception in Spool Valves

Martin, C. S. and Medlarz, H. and Wiggert, D. C. and Brennen, C. E. (1979) Cavitation Inception in Spool Valves. In: International Symposium on Cavitation Inception : presented at the ASME winter annual meeting, New York, New York, December 2-7, 1979. Fluids Engineering Division. American Society of Mechanical Engineers , New York, pp. 219-232.

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Cavitation has been investigated in directional control valves in order to identify damage mechanisms characteristic of components of aircraft hydraulic systems. Tests have been conducted in a representative metal spool valve and in a model three times larger. Data taken under non-cavitating conditions with both valves showed that the position of the high-velocity annular jet shifts orientation depending upon valve opening and Reynolds number. By means of high-frequency response pressure transducers strategically placed in the valve chamber cavitation could be sensed by the correlation of noise with a cavitation index. The onset of cavitation can be detected by comparing energy spectra for a fixed valve opening and a constant discharge. Another sensitive indicator of cavitation inception is the ratio of cavitating to non-cavitating spectral densities. The incipient cavitation number as defined in this investigation is correlated with the Reynolds number for both valves.

Item Type:Book Section
Additional Information:This investigation was supported in full by the Air Force Base Propulsion Laboratory through AFOSR Contract F33615-77-C-2036, which was administered by Project Engineer Paul D. Lindquist. The authors would also like to acknowledge the direct contribution of J. I. Craig, F. D. Lewis and H. J. Bates.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)F33615-77-C-2036
Series Name:Fluids Engineering Division
Record Number:CaltechAUTHORS:MARasmesci79
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:220
Deposited By: Christopher Brennen
Deposited On:10 Dec 2004
Last Modified:07 Mar 2020 00:36

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