二维双区球流运动唯象学方法实验研究

Phenomenological Method Investigation of Pebble Flow Dynamics in Two-dimensional Two-region Pebble-bed Reactor

基于唯象学方法的4种基本形式开展球流实验研究,以根据相似准则的原理建立的高温气冷堆二维堆芯的球流运动实验系统为模拟对象,对球流运动进行实验模拟。结果表明:球流实验采用循环加球方式更能反映实际反应堆的情况;球流运动具有从下向上、从中间向两侧传播的特性,中心区快于环形区,整体不表现出层流特性;在中心区和环形区间存在着交混区域;在球床底部角落存在明显的运动缓慢区域。

By means of the four basic forms of the phenomenological method,the experimental research was carried out according to the principle of similarity criterion to simulate 2D pebble flow dynamics of high-temperature gas-cooled reactor.The result indicates that the test with circulating pebble-loading mode obviously presents better the situation in the real pebble bed reactor.The pebble flow dynamics spreads from bottom to top and from middle to sides.The movement of pebbles in central region is faster than that in annulus region and has no laminar characteristics performance.The mixed zone exists between central region and annulus region,and the distinct stagnant zone also exists at pebble bed bottom corner.