10 MW高温堆热气联箱气流混合模拟的相似律

１０ＭＷ高温气冷实验堆芯出口需设置热气联箱，以使氦气得到充分的热混合。使用两流体方程无量纳化分析方法导出相似准则，得到了热气联箱在缩小模型比例的系统上以常压小温差空气代替主压大温差氦气进行热工水力学模拟试验研究时应遵循的模拟准则，即几何准则、流动准则和传热准则。

THERMAL MIXING SIMILARITIES FOR THE HOT GAS PLENUM OF THE 10 MW HIGH TEMPERATURE GAS COOLED REACTOR

One special hot gas plenum is designed under the pebble bed core of the 10 MW high temperature gas cooled reactor, so that the outlet coolant helium could be mixed sufficiently. Applying similarity theory on two fluid model equations, several similarity laws such as Reynolds number, Prandtl number, velocity ratio, geometrical similitude are derived, which are the modeling criteria to direct the scale test. The coolant thermal mixing performance in the plenum is experimentally investigated on a small scale test model according to similarity laws, using low pressure small temperature differential air mixing to simulate high pressure large temperature differential helium mixing. The experimental results demonstrate the vali dity of the similarity laws and also supply structural and thermohydraulic parameters for the high temperature reactor.