环形通道内液态金属钠沸腾两相传热特性实验研究

对环形通道内液态金属钠沸腾两相流动特性进行了实验研究。实验中,系统压力为3.6~110.0kPa,热流密度为11~600kW·m~(-2),流速为0.02~0.45m·s~(-1)。实验结果表明,液态金属钠沸腾传热系数与壁面热流密度和系统压力有强烈关系,而与入口过冷度和质量流速无关。在本文实验数据基础上,拟合得到了计算液态金属钠沸腾两相传热系数的关系式,通过与各组实验数据间的比较,证明本文关系式适用于计算环形通道内液态金属钠沸腾两相传热系数。

Experimental Research on Heat Transfer Characteristics of Boiling Two-phase Liquid Sodium in Annuli

Experimental research on the heat transfer characteristics of boiling two-phase sodium flowing in an annuli was done .Experimental conditions were system pressure from 3.6 to 110.0 kPa ,heat flux from 11 to 600 kW · m-2 and velocity from 0.02 to 0.45 m · s-1 .The experimental results show that the boiling heat transfer coefficient of sodium is affected significantly by the heat flux and system pressure instead of the inlet subcooling or mass flow rate .On the base of the experimental data ,a correlation of the heat transfer coefficient for boiling sodium was proposed .Applicability of this correla-tion to the liquid metal sodium boiling in an annuli was proved by comparing the correla-tion results to those experimental data .