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10 MW高温气冷堆(HTR-10)直接利用蒸汽发生器内的90°弯头结构对氦气流量进行测量,为了保证反应堆的安全性与经济性,结合实验和数值模拟的方法研究了不同弯径比条件下90°弯头内流体流动特性。依据弯头内、外弧面压力分布的实验结果对CFD计算模型的可信性进行了验证,并针对高温气冷堆蒸汽发生器内的工况,计算了不同弯径比条件下90°弯头处氦气的流动特性。对比实验结果和CFD模拟结果可发现,当管道直径一定时,弯头内、外弧面的压力呈现明显的不均匀分布现象,弯径比越小,内、外弧面的压差越大,压力分布的变化速率也越快。对于相同弯曲角度处截面上的压力分布来说,弯径比越小,压力分布的变化速率越大。
The 10 MW high temperature gas cooled reactor (HTR-10) directly measures the flow of helium through the 90 ° elbow structure in the steam generator. In order to ensure the safety and economy of the reactor, experiments and numerical simulations were conducted to investigate the differences Flow Characteristics in a 90 ° Elbow under Bending Ratio. According to the experimental results of the pressure distribution inside and outside the elbow, the credibility of the CFD calculation model was verified. According to the working conditions in the steam generator of high temperature gas cooled reactor, the 90 ° bending Head of helium flow characteristics. Comparing the experimental results with the CFD simulation results, it can be found that when the pipe diameter is constant, the pressure inside and outside the elbow shows obvious uneven distribution. The smaller the diameter-diameter ratio, the larger the pressure difference between the inner and outer arc surfaces, The pressure distribution changes faster. For the pressure distribution on the cross section at the same bending angle, the smaller the diameter ratio, the greater the rate of change of the pressure distribution.