文丘里气液混合器空化流场的数值模拟

Numerical Simulation of Cavitation Flow Field in Venturi Gas-liquid Mixer

本文采用标准k-ε模型和Zwart-Gerber-Belamri空化模型,通过对文丘里气液混合器内的空化流场云图、蒸汽体积分数及空化数进行数值分析,探究了进口压力、温度、进气流量对气液混合器内空化流场的影响规律。结果表明:在出口压力一定时,随着入口压力的增加,空化区域变大,吸气孔处压力降低,进气量变大;进气流量对空化效果影响显著,空化强度与进气流量成反比,随着进气流量的不断增加,空化核心区域不断减小,保持较高的空化强度则需要较小的进气量。

This article uses the standard k-εmodel and Zwart-Gerber-Belamri cavitation model to numerically analyze the cavitation flow field cloud map,steam volume fraction,and cavitation number inside the Venturi gas-liquid mixer.The influence of inlet pressure,temperature,and intake flow rate on the cavitation flow field inside the gas-liquid mixer is explored.The results show that when the outlet pressure is constant,as the inlet pressure increases,the cavitation area becomes larger,the pressure at the suction hole decreases,and the intake volume increases.The intake flow rate has a significant impact on the cavitation effect,and the cavitation intensity is inversely proportional to the intake flow rate.As the intake flow rate continues to increase,the cavitation core area decreases,and maintaining a high cavitation intensity requires a smaller intake volume.