论文部分内容阅读
本文对二维窄缝形喷嘴垂直喷流高速冲击冷却滞止区受热平板的饱和液体喷流沸腾临界热流密度(CHF)进行了实验研究,通过理论推导和实验数据的归纳处理.得到了一个无量纲半理论半经验型预示公式.同时也对高速过冷液体喷流沸腾CHF进行了实验研究.并推导出预示公式.对高速喷流时喷流速度和过冷度影响滞止区喷流沸腾CHF的机理进行了定量解释.对高速喷流条件下喷流速度和过冷度对滞止区高速喷流沸腾CHF的影响进行了深入讨论,从理论分析和实验验证两方面探讨了饱和或过冷液体二维喷流沸腾时CHF达到最大值所对应的最大喷流速度,以及所对应的CHF的极限值.
In this paper, the critical heat flux density (CHF) of saturated liquid jet boiling of two-dimensional narrow slot nozzle vertical jet high-speed impingement cooling stagnation zone heating plate was experimentally studied, and theoretically derived and experimental data were summarized. Semi-empirical semi-empirical prediction formula.At the same time, the experimental study of high-speed subcooled liquid jet boiling CHF was also carried out and the predictive formula was deduced.The effects of jet velocity and supercooling on the jet boiling in the stagnation zone CHF.Further discussion is made on the influence of jet velocity and degree of undercooling on the CHF of stagnant zone high-speed jet boiling under the condition of high-speed jet flow. The effects of saturation or over-flow on both theoretical analysis and experimental verification are discussed The maximum jet velocity corresponding to the maximum CHF reached by the two-dimensional jet of cold liquid when it boils, and the corresponding CHF limit.