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为了直观地得到压力脉动强度和位置特征,在求解非定常雷诺时均方程(URANS)数值计算的基础上,详细分析了单叶片离心泵内部压力脉动量的组成成分,并定义了考虑整个叶轮旋转周期内累积效应的压力脉动强度标准差算法来表征脉动源.通过与压力脉动测量结果的对比,验证了数值计算的可信性.对叶轮、蜗壳和前后泵腔流道内不同工况下的压力脉动强度和分布进行了对比分析,结果表明:不同运行流量对泵内周期性压力脉动的强度和位置有明显作用;总体上,流量越大,标准差脉动强度也相应越大;通过掌握压力脉动强度分布特性,能够为多工况运行的低压力脉动单叶片泵水力设计提供重要的理论依据.
In order to get the pressure pulsation intensity and position characteristic intuitively, on the basis of solving the unsteady Reynolds averaged equations (URANS) numerical calculation, the components of the internal pressure pulsation in a single vane centrifugal pump are analyzed in detail and the influence of the whole impeller rotation And the standard deviation of the cumulative pressure pulsation strength is used to characterize the pulsating source.The reliability of the numerical calculation is verified by comparison with the results of pressure pulsation.For the different conditions of the impeller, Pressure pulsation intensity and distribution are compared and analyzed. The results show that: different operation flow has a significant effect on the intensity and position of periodic pressure pulsation in the pump. Generally speaking, the larger the flow rate, the greater the standard deviation pulsation intensity; by controlling the pressure The pulsating strength distribution can provide important theoretical basis for hydraulic design of low pressure pulsating single vane pump operating in multiple working conditions.