CAJ | 학술논문

采用调整混流泵径向间隙的方法，设计了蜗壳基圆直径为280、290、300mm的计算模型，并对其进行了定常和非定常计算．通过对3种模型进行非定常数值计算，得到了不同基圆直径混流泵的压力脉动特性并对其进行比较分析．结果表明：叶轮旋转时叶片和隔舌的动静干涉作用导致蜗壳近壁面各监测点的压力脉动具有明显的周期性；在相同流量下，径向间隙越小，监测点频域振幅越大；隔舌处监测点压力脉动幅度大于其他监测点幅度．对基圆直径为290mm的泵进行数值模拟与外特性试验研究，泵模拟效率为82．3％，试验效率为80％，模拟效率比试验效率高2．3％．对比两者结果可知：数值模拟的结果是可信的．
채용조정혼류빙경향간극적방법，설계료와각기원직경위280、290、300mm적계산모형，병대기진행료정상화비정상계산．통과대3충모형진행비정상수치계산，득도료불동기원직경혼류빙적압력맥동특성병대기진행비교분석．결과표명：협륜선전시협편화격설적동정간섭작용도치와각근벽면각감측점적압력맥동구유명현적주기성；재상동류량하，경향간극월소，감측점빈역진폭월대；격설처감측점압력맥동폭도대우기타감측점폭도．대기원직경위290mm적빙진행수치모의여외특성시험연구，빙모의효솔위82．3％，시험효솔위80％，모의효솔비시험효솔고2．3％．대비량자결과가지：수치모의적결과시가신적．
The three-dimensional steady and unsteady numerical method was applied to simulate the flow in the mixed-pump with different volute casings.The base circle diameters of three volute casings were 280 mm,290mm and 300mm,the characters of the pressure fluctuation were obtained with different base circle diameters.The results show that the pressure pulsation presen-ted an obvious periodicity.At the same flow rate,the smaller the radial clearance,the larger frequency domain of pressure fluctu-ation at each monitoring point.The fluctuation amplitude near the volute tongue is larger than other points.For the mixed-pump with 290mm volute base circle diameters its performance experiments and numeric simulations were done.The calculated results are in good agreement with measurement results.Numerical simulation is believable.