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Research Papers

Transitional Phenomena in Ultrasonic Shock Waves Emitted by Cavitation on Hydrofoils

[+] Author and Article Information
F. Numachi

Tōhoku UniversityInstitute of High Speed Mechanics, Sendai, Japan

J. Basic Eng 81(2), 153-162 (Jun 01, 1959) (10 pages) doi:10.1115/1.4008401 History: Received August 07, 1958; Published June 01, 1959; Online February 20, 2019

Abstract

In some cases during the experiments described in past reports [1, 2] which dealt with cavitation-induced ultrasonic shock waves, extremely anomalous values were obtained in the imparted pressure of the shock waves. The paper deals with an investigation into the nature of these shock-wave anomalies, and it is demonstrated that these anomalies can be caused not only in closed-circuit cavitation tunnels but can be produced in any flow subjected to preliminary cavitation at a point upstream of the point of principal cavitation. The nature of the anomalies occurring in the shock-wave spectrum was studied, and its relation to cavitation-bubble size was made clear.

Copyright © 1959 by ASME
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