平板滞止区内R-113的喷流沸腾临界热流密度

The Critical Heat Flux for Boiling of R-113 Jet Impingement on a Stagnation Zone

对高温平板滞止区内R-113的喷流冲击沸腾的临界热流密度(CHF)进行了系统的稳态实验研究.考察了过冷度、流速、喷流直径等流动条件对喷流沸腾CHF的影响,建立了预示CHF的经验型方程,方程中的参数指数和系数由实验数据拟合得到.研究结果表明:过冷液体喷流冲击沸腾的CHF取决于过冷度、滞止冲击速度和喷流直径;得到的经验式能较好地预示实验结果.

A steady heat transfer experiment was carried out for predicting the critical heat flux （CHF） of convective boiling for a round R-113 liquid jet impingement on the stagnation zone of a hot surface. The tical he retical semi-empirical correlations were proposed for predicting t and subcooled R-113 liquid jet impinging on the stagnation zon agree well with the experimental data. at flux were investigated. Two semi-theo- he CHF of convective boiling for saturated e in a wide range. The predicting results