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基于面积比原理对冲压泵叶轮出口与导叶进口的匹配进行设计与研究,采用数值模拟和试验研究相结合的方法研究了叶轮出口与导叶进口面积比和导叶进口与导叶到泵腔壁间环形进口面积比对泵内部流场和性能的影响。分别对5种不同面积比的冲压泵模型进行计算分析,结果表明:随着叶轮出口面积F2与导叶进口面积F3比值Y=F3/F2的增大,导叶进口流速越来越小,冲压泵的扬程和效率不断提高,当由Y=1.48增大到Y=3.49时,扬程和效率分别提高了约3.0%和2.0%。随着导叶到泵腔壁间环形进口面积F的增大,导叶出口的平均静压值先增大而后又下降,冲压泵的扬程和效率也先增大后下降,当F=1 680.4 mm2(F/F3=197.2%)时,扬程和效率都达到最大值。
Based on the principle of area ratio, the impeller impeller exit and guide vane inlet matching design and research, the numerical simulation and experimental study of the combination of the impeller exit and guide vane inlet area ratio and guide vane inlet and guide vane to the pump chamber Effect of annular area ratio on the flow field and performance of pump. The results show that with the increase of the ratio of the outlet area F2 of the impeller to the inlet area F3 of the guide vane Y = F3 / F2, the flow velocity of the guide vane is getting smaller and smaller, Pump head and efficiency are continuously increasing. When Y = 1.48 is increased to Y = 3.49, lift and efficiency are increased by about 3.0% and 2.0% respectively. With the increase of annular inlet area F between guide vane and pump cavity wall, the average static pressure value at the outlet of guide vane first increases and then drops again. The head and efficiency of the press pump first increase and then decrease. When F = 1 680.4 mm2 (F / F3 = 197.2%), the lift and efficiency all reach the maximum value.