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为研究高速部分流泵由于叶轮和蜗壳的动静干涉而产生压力脉动情况,采用Fluent 6.3软件中S-A湍流方程和滑移网格技术(SM),分别选取直叶轮和复合直叶轮,在设计工况点进行非定常的数值模拟,分析中间截面总压和静压分布云图,发现复合直叶轮的总压高于直叶轮,而静压相近;在出口和蜗壳内壁圆周的0°9,0°,180°和270°处布置4个监测点,比较总压脉动情况看出,复合叶轮的峰值明显高于直叶轮,而峰值之间的波动幅度要比直叶轮的小。
In order to study the pressure pulsation caused by the interference between the impeller and the volute in the high-speed partial flow pump, the SA turbulence equation and the sliding mesh technique (SM) in the Fluent 6.3 software were used to select the straight impeller and the composite straight impeller. The unsteady numerical simulation was carried out. The total pressure and static pressure distribution in the middle section were analyzed. The total pressure of the composite straight impeller was higher than that of the straight impeller and the static pressure was similar. At the outlet and the inner wall of the volute, 0 ° 9,0 Four monitoring points were arranged at °, 180 ° and 270 °. Comparing the situation of total pressure pulsation, the peak value of compound impeller was obviously higher than that of straight impeller, and the fluctuation amplitude between peaks was smaller than that of straight impeller.