Influence of gas nucleus on scale effect of cavitation

Abstract

For the scale effect of cavitation test,the influence of gas nucleus on scale effect is analyzed in this paper.The effects of density,distribution and initial radius of gas nucleus on scale effect are analyzed respectively and the measures necessary for reduction of resulting scale effect are attained.At the same time,critical pressure is applied to replace the cavitation number defined by vaporization pressure and the relationship between initial dimension of gas nucleus and tensile strength of liquid is established to endeavor for eliminating the effects of tensile strength of liquid on scale effect.In order to eliminate scale effects of cavitation,some problems required to be paid attention to cavitation test are summarized to provide the references for actual test and prepared in further quest of complete and accurate simulation methods.