The use of cavitation impact is a practical method for improving the fatigue strength of metals in the same way as shot peening. In the case of peening using cavitation impact, cavitation is produced by a high-speed submerged water jet with cavitation, i.e., a cavitating jet. A cavitating jet in air was successfully generated by injecting a high-speed water jet into a low-speed water jet injected into air using a concentric nozzle. In order to investigate the various appearances of cavitating jets in air, an observation was carried out using high-speed photography and high-speed video recording. In this study, periodical shading of the cavitation cloud was observed and the frequency of the shading was found to be a function of the injection pressure of the low-speed water jet. Unsteadiness of the low-speed water jet, which is related to the periodical shading of the cloud, was also observed.
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November 2005
Technical Papers
High-Speed Observation of a Cavitating Jet in Air
Hitoshi Soyama
Hitoshi Soyama
Professor
ASME Member, Member #:2045284 +81-22-217-6891
+81-22-217-3758
Department of Mechanical Engineering,
e-mail: soyama@mm.mech.tohoku.ac.jp
Tohoku University
, 6-6-01 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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Hitoshi Soyama
Professor
ASME Member, Member #:2045284 +81-22-217-6891
+81-22-217-3758
Department of Mechanical Engineering,
Tohoku University
, 6-6-01 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japane-mail: soyama@mm.mech.tohoku.ac.jp
J. Fluids Eng. Nov 2005, 127(6): 1095-1101 (7 pages)
Published Online: July 14, 2005
Article history
Received:
September 27, 2004
Revised:
July 14, 2005
Citation
Soyama, H. (July 14, 2005). "High-Speed Observation of a Cavitating Jet in Air." ASME. J. Fluids Eng. November 2005; 127(6): 1095–1101. https://doi.org/10.1115/1.2060737
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