高温颗粒沉降冷液热工水力特性

Thermo Hydraulics Characteristic Around a High-Temperature Particle Dropping in Coolant Liquid

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小规模可视化实验研究,发现高温小球在冷却剂中的速度低于冷球,且随球温的升高而减小.通过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,从本质上了解该结构条件下的热工水力特性,建立合理的机理描述,从而提高对高温沸腾苛刻条件下多相流问题进行研究的实验和理论水平.

The movement characteristic of a hot particle was experimentally studied by using a multi-phase boiling facility. The results show that the hot particle with such specific configuration in coolant liquid moves slower than the cold particle without the configuration. The first terminal velocity becomes smaller with the increase of the temperature of the hot particle. It is meaningful to the development of multi-phase multi-component simulation code.