射流冲击下高温壁面在淬冷过程中的传热特性的实验研究

EXPERIMENTAL STUDY OF JET IMPINGEMENT HEAT TRANSFER DURING QUENCHING

本文对射流冲击下的瞬态快速冷却过程的传热特性进行了实验研究,并分别对膜态沸腾、过渡沸腾、临界热流密度和核态沸腾等传热阶段进行了分析,讨论了表面冷却速率对沸腾过程产生影响的原因,将实验数据归纳整理成若干个半经验关系式。

The characteristics of jet impingement transient cooling have been studied experimentally. Completed boiling curves have been obtained including film boiling, transition boiling, CHF and nucleate boiling. It is comfirmed from experiments that test surface cooling rate has a strong effect on boiling heat transfer process due to the vapor residue on the cooling surface. The semi-empirical formulars for jet impingement transient cooling heat transfer rate were developed in transition boiling region and CHF point.