Analysis on Pressure Fluctuations of Unsteady Flow Field in Mixed-Flow Main Coolant Pump
Analysis on Pressure Fluctuations of Unsteady Flow Field in Mixed-Flow Main Coolant Pump
复制标题
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Liang Jun
中科院分区：
文献类型：
--
作者：
Liang Jun
为了研究主泵内部压力波动，采用大涡模拟方法对模型泵内部进行了三维非定常数值模拟，通过设置监测点，得到了不同位置的压力波动情况，结果表明，压力脉动的最大值发生在叶轮出口处，从叶轮进口到导叶出口，压力脉动的最大值发生在导叶出口处，压力脉动的最大值发生在导叶出口处叶片的脉动幅度先增大后减小，压力脉动频率受叶轮旋转频率的控制，球壳内的脉动幅度沿着径向减小，压力脉动频率与叶轮旋转频率有关。
In order to study internal pressure fluctuations of main coolant pump, the large eddy simulation method was applied to simulate the 3-D unsteady flow in the model pump.The pressure fluctuations at different locations were obtained by setting monitoring points,and frequency domain analysis was achieved.Results show that the maximum amplitude of pressure fluctuation takes place at the outlet of impeller.From the inlet of impeller to the outlet of guide vanes,the fluctuation amplitude increases at first and then decreases,the frequency of pressure fluctuation is dominated by rotational frequency of the impeller.The fluctuation amplitude in the spherical shell decreases along the radial direction,and the frequency of pressure fluctuation is related to rotational frequency of the impeller.