Abstract
The physical model and mathematical model of cavitation nozzle inner and external flow fields are established to study the effect of the angle cavitation nozzle on cavitation jet. The numerical simulation of cavitation jet flow fields is carried out by using the mixed model, cavitation model and RNG ?资￣ε turbulence model of the fluid mechanics simulation software FLUENT. Based on the gas volume distribution in the flow fields, the influence on the cavitation jet of the cylinder diameter, the inlet pressure and the ambient pressure is analyzed. The simulation results show that under the same condition of inlet pressure, the larger the cylinder diameter is, the better the cavitation effect is. Increasing the inlet pressure of the nozzle can improve the cavitation degree of the jet. However, the existence of ambient pressure can suppress the formation of cavitation bubbles and it is not conducive to the improvement of cavitation effect. The numerical simulation results can provide guidance for the generation of cavitation jet.
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