Dissolved Gas-Content-Effects on the Stochastic Behavior of Desinent Cavitation : 1st Report, Case of Air Saturated Water

Abstract

In order to make clear the dominant factor on which cavitation initiates, I statistically analyzed the acoustic pressure pulses generated from cavitation in a typical orifice flow and simultaneously observed the cavitation aspect in the near-desinent cavitation range, for various dissolved CO₂-gas contents C in naturally air saturated water. The CO₂-gas was dissolved into the water under almost the same cavitation-nuclei-distribution. Since both the aspect and the corresponding stochastic behavior of the acoustic pulses change considerably with C, it is concluded that the dissolved gas could be a dominant factor on the cavitation through a typical process by which the nuclei rapidly grow within the dead water region.