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 noncavitating 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 noncavitating spectral densities. The incipient cavitation number as defined in this investigation is correlated with the Reynolds number for both valves.
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December 1981
Research Papers
Cavitation Inception in Spool Valves
C. Samuel Martin,
C. Samuel Martin
School of Civil Engineering, Georgia Institute of Technology, Atlanta, Ga.
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H. Medlarz,
H. Medlarz
Institute for Hydromechanics, University of Karlsruhe, Karlsruhe, West Germany
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D. C. Wiggert,
D. C. Wiggert
Department of Civil Engineering, Michigan State University, East Lansing, Mich.
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C. Brennen
C. Brennen
Department of Mechanical Engineering, California Institute of Technology, Pasadena, Calif.
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C. Samuel Martin
School of Civil Engineering, Georgia Institute of Technology, Atlanta, Ga.
H. Medlarz
Institute for Hydromechanics, University of Karlsruhe, Karlsruhe, West Germany
D. C. Wiggert
Department of Civil Engineering, Michigan State University, East Lansing, Mich.
C. Brennen
Department of Mechanical Engineering, California Institute of Technology, Pasadena, Calif.
J. Fluids Eng. Dec 1981, 103(4): 564-575 (12 pages)
Published Online: December 1, 1981
Article history
Received:
March 18, 1980
Online:
October 26, 2009
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A commentary has been published:
Discussion: “Cavitation Inception in Spool Valves” (Martin, C. Samuel, Medlarz, H., Wiggert, D. C., and Brennen, C., 1981, ASME J. Fluids Eng., 103, pp. 564–575)
Citation
Martin, C. S., Medlarz, H., Wiggert, D. C., and Brennen, C. (December 1, 1981). "Cavitation Inception in Spool Valves." ASME. J. Fluids Eng. December 1981; 103(4): 564–575. https://doi.org/10.1115/1.3241768
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