Martin, C. S. and Medlarz, H. and Wiggert, D. C. and Brennen, C. (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. http://resolver.caltech.edu/CaltechAUTHORS:MARasmesci79
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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.|
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|Deposited By:||Christopher Brennen|
|Deposited On:||10 Dec 2004|
|Last Modified:||26 Dec 2012 08:39|
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