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通过１∶２的实验模型，对大庆２００ＭＷ低温核供热堆主换热器进行了水力学模拟研究。研究结果表明：当Ｒｅ＞５０００时，换热器的阻力系数已进入自模区。给出了换热器达到自模时的阻力系数及各流程间的流动阻力分布。提出了减少出口段流动阻力的优化设计方案。阻力系数的设计值与模拟研究结果相吻合。描述了发生２次流量漂移现象时，各系统参数的变化过程。为大庆２００ＭＷ低温核供热堆主换热器的最终设计提供了实验基础。
The 1: 2 experimental model was used to simulate the main heat exchanger of 200MW low temperature nuclear reactor in Daqing. The results show that: when Re> 5000, the resistance coefficient of the heat exchanger has entered the self-mold area. The coefficient of resistance when the heat exchanger reaches the self-mold and the flow resistance distribution between each process are given. The optimal design scheme to reduce the flow resistance of the outlet section is proposed. The design values of the drag coefficients are in good agreement with the simulation results. Describes the phenomenon of two flow drift occurs when the system parameters of the change process. Which provided the experimental basis for the final design of Daqing 200MW low temperature nuclear reactor main heat exchanger.