One Predicting Method of Gaseous Cavitation Occurrence in Water and Sodium

概要

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One predicting method is presented for determining the incipient condition of gaseous cavitation by analogy with a local choked flow condition of a homogeneous bubble mixture. Cavitation criterion is defined as a condition in which the flow velocity reaches the local isothermal sonic velocity. As the result of an experimental confirmation which was performed by measuring the choking characteristics of pressure wave propagation at the throat, a reasonable agreement is obtained between the desinent condition and an estimated chocked flow one. It is also shown that the predicting method is useful to estimate qualitatively some gaseous cavitation phenomena presented hitherto, and cavitation inception in a sodium has a similar tendency to that in cold water.
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