An experimental investigation was conducted to study the cavitation inception of six isolated irregularities for negative and positive pressure gradients.The relationship between the root-mean-square of pressure fluct...An experimental investigation was conducted to study the cavitation inception of six isolated irregularities for negative and positive pressure gradients.The relationship between the root-mean-square of pressure fluctuation and the oscillating radius of gas bubble was determined in this paper.The results of the experiment show that the incipi- ent cavitation numbers for the same protrusions are higher and the intensities of pressure fluctuation are lower in negative gradient flows than that in positive pressure gradient flows.The peaks of pressure fluctuation are seven to twelve times that of the root-mean-square values of pressure fluctuation.展开更多
文摘An experimental investigation was conducted to study the cavitation inception of six isolated irregularities for negative and positive pressure gradients.The relationship between the root-mean-square of pressure fluctuation and the oscillating radius of gas bubble was determined in this paper.The results of the experiment show that the incipi- ent cavitation numbers for the same protrusions are higher and the intensities of pressure fluctuation are lower in negative gradient flows than that in positive pressure gradient flows.The peaks of pressure fluctuation are seven to twelve times that of the root-mean-square values of pressure fluctuation.
