This paper deals with experimental and numerical computation analysis of the critical heat flux ( CHF ) occurrence at the conditions of subcooled boiling flow in rod bundles with grid spacers. 本文采用实验和数值计算分析相结合的方法,研究了带定位格架棒束通道内过冷流动沸腾工况下临界热流密度(CHF)(CHF)发生情况。
The effects of gap size, heat flux and inlet subcooling on the boiling incipience, flow pattern, heat transfer coefficient, flow instability and critical heat flux were analyzed and discussed. 讨论和分析了流道间隙、加热功率和入口过冷度对沸腾起始点、沸腾流态、换热系数、流动不稳定性和临界热负荷的影响。
These results provide some theoretical bases for critical heat flux control in space. 这一结论为太空临界热控制提供了一定的理论基础。
In the experiments, onset of the nucleate boiling ( ONE ), two-phase flow pattern, heat transfer performance, flow instability and critical heat flux were carefully observed and recorded. 实验中对沸腾起始点、沸腾流态、传热特性、流动不稳定性和临界热负荷进行了仔细的观察和记录;
From the analysis of the boiling mechanism and processing by means of the analogy principle of two-phase flow, we have been derived a criterion equation to express critical heat flux. 从沸腾机理分析和应用两相流的相似原理进行处理,我们推导了表达临界热流计算的准则方程。