气-液条件下导叶出口位置对反应堆冷却剂主泵性能的影响

Effect of Guide Vane Outlet Position on Nuclear Reactor Coolant Pump under Gas-liquid Two-phase Condition

为研究在气-液两相流条件下,导叶出口边安放位置对反应堆冷却剂主泵(主泵)内部流场特性的影响,采用三维建模软件Pro/E建模,网格划分软件IECM划分非结构网格,计算流体动力学(CFD)软件CFX进行数值模拟。模拟过程中采用雷诺时均N-S方程和k-ε湍流模型,使用多相流模型中的混合物模型对主泵在气-液两相条件下的内部流场进行数值模拟。对不同导叶出口边安放位置时泵壳和导叶内的含气率分布、液相和气相相对速度分布进行研究。结果表明,在气-液两相流条件下,不同导叶出口边安放位置对导叶和泵壳内的含气率、相对速度分布有一定的影响;不同导叶出口边安放位置时,泵壳内的气体聚集程度不一样,当导叶出口边位于泵壳中心垂直平面上时,泵内部流动效果最佳。

To study the inner fluid field effect caused by guide blade outlet side position of reactor coolant pump in two-phase condition, three dimensional software Pro/E, non-structural mesh software ICEM, Reynolds time-averaged N-S equations, standard k-e turbulent model, and CFD software CFX were used to calculate the three-dimensional turbulent flow of nuclear model pumps with different guide blade outlet side position. The void fraction, two-phase relative velocity distribution in the center section of vane and volute are analyzed. The results show that the effect of different guide blade outlet side position to the performance of reactor coolant pump is obvious. It revealed that the flow performance is best when guide blade outlet side is in the centre vertical plane of volute. Research results reflect the internal flow field characteristics of reactor coolant pump in a certain extent, and it also could provide the beneficial reference of the place of vane in the volute of nuclear reactor coolant pump.