高温气冷实验堆堆芯出口热气联箱混合性能对比试验

１０ＭＷ高温气冷实验堆堆芯出口冷却剂温度径向分布很不均匀，若不使之均匀化，将造成蒸汽发生器件部上过大的热应力，设置在堆底反射层中的堆芯出口热气联箱的作用之一是使冷却剂氦气在其中得到充分的热混合。

Comparative Tests of Mixing Performanceof the Hot Gas Plenum with DifferentThermal Mixing Element in 10MW HTR Test Module

One of the functions of hot gas plenum at the outlet of the core of HTR 10 is to get sufficient thermal mixing of helium coolant which has uneven radial temperature distribution.On a scale of 1 to 1.5 analogical simulating test model,mixing performances of 4 kinds of hot gas plenum structures have been experimentally studied.The test results obtained indicate that the hot gas plenum without any mixing element possesses a relatively low mixing degree,and the hot gas plenum with a partition mixer has a very good thermal mixing function for the coolant and can yield a nondimensional temperature mixing degree of more than 94% at the exit of the plenum.