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为研究核反应堆主冷却剂泵在失水事故工况下的全特性,通过三维软件Pro/E对核主泵内部流道进行三维造型,利用雷诺时均N-S方程和RNG k-ε两方程及SIMPLEC算法,应用计算流体力学软件(CFX)对核主泵全特性进行数值模拟计算,分析核反应堆主冷却剂泵的全特性曲线,并解释小流量出现驼峰现象的原因。结果表明:叶轮所受的扭矩主要来自于叶片所受的扭矩,前后盖板所受的扭矩对叶轮的影响很小。叶片所受的扭矩和轴向力的变化趋势和流量-扬程曲线变化规律有一定的相似性,三者之间可能有密切关系。
In order to study the full characteristics of the main coolant pump in the event of water loss accident, three-dimensional modeling of the inner flow channel of the nuclear main pump was carried out by the three-dimensional software Pro / E. Using the Reynolds averaged Navier-Stokes equations and RNG k-ε equations and the SIMPLEC Algorithm, CFD is used to calculate the full characteristic of the main nuclear pump, analyze the full characteristic curve of the main coolant pump and explain the reason of the hump phenomenon in the low flow rate. The results show that the impeller torque mainly comes from the torque suffered by the blade, and the torque exerted by the front and rear covers has little influence on the impeller. The variation tendency of the torque and axial force suffered by the blade and the flow-head curve have certain similarities, and the three may have a close relationship.