Cavitation Inception in Spool Valves
- Others:
- Morgan, W. B.
- Parkin, Blaine R.
Abstract
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.
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.Attached Files
Published - MAR039.pdf
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Additional details
- Eprint ID
- 220
- Resolver ID
- CaltechAUTHORS:MARasmesci79
- F33615-77-C-2036
- Air Force Office of Scientific Research (AFOSR)
- Created
-
2004-12-10Created from EPrint's datestamp field
- Updated
-
2020-03-07Created from EPrint's last_modified field
- Series Name
- Fluids Engineering Division
- Series Volume or Issue Number
- NULL