膜态沸腾条件下高温颗粒周围流体热动力特性的实验研究

Experimental study of heat and dynamic chara cteristics of hot particles moving in coolant under film boiling condition

利用已有的实验和理论基础 ,对高温球体与冷液在膜态沸腾条件下的多相混合结构进行详细的小规模实验研究 ,分析了单个高温颗粒在水中阻力受力的情况。发现高温小球在冷却剂中的速度比冷球的低 ,且随球温的升高而减小。目的是利用小规模实验研究单个高温颗粒的传热和阻力特性 ,可以分割各种在膜态高速沸腾条件下干扰换热与运动的影响因素 ,从而从本质上了解该结构条件下的热动力特性。

In this paper the movement characteristics o f hot particles with a vapor film moving in coolant is experimentally studied by using a multi-phase boiling facility. The results show that the hot particles with such specific configuration in coolant move slower than the cold particles without the configuration. The terminal velocity becomes slower with the increas e of the temperature of the hot particles. It is meaningful to the development o f and multi-phase and multi-component simulation code.