大庆 200 MW 低温堆换热器水力学模拟实验研究

EXPERIMENTAL SIMULATION STUDY ON HYDRAULIC BEHAVIOR OF THE MAIN HEAT EXCHANGER OF DAQING 200 MW NUCLEAR HEATING REACTOR

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 hydraulic behavior of the main heat exchanger of Daqing 200 MW nuclear heating reactor is studied through a 1∶2.33 test model.The design and other feature of the test model is described. The experimental results show that the flow resistance coefficient of the heat exchanger becomes self simulation when Reynolds number is greater than 5000.The value of flow resistance coefficient at self simulation condition and the distribution of pressue drop in the heat exchanger are given through experiment. The optional design to reduce flow resistance is proposed. The designed and experimental values for the flow resistance coefficient are in good agreement. The variation of system parameters during flow excursion is described. The experimental results are of great significant for the final design of the main heat exchanger of Daqing 200 MW nuclear heating reactor.