An air flow simulating test in the coolant channel of the core bottom of the 10 MW HTR module

In order to investigate the efficiency of the thermal mixing of the coolant helium in the coolant channel of the core bottom and the hot gas duct, an air flow test has been performed on a scale of 1 to 1.5 analog simulating test model. The test facility and the test are described. The results of the simulating test indicate that the coolant channel designed in the core bottom reflector and the hot gas duct of the HTR-test Module possesses very good function of the coolant thermal mixing and can yield a non-dimensional temperature mixing degree of more than 98% and an uniformity of thermal distribution of over 99% at the exit of the hot gas duct