摇摆运动下矩形窄通道内流动沸腾阻力特性

Pressure Drop Characteristic of Flow Boiling in Narrow Rectangular Channel Under Rolling Motion

本工作对摇摆运动下水在矩形窄通道内流动沸腾阻力特性进行实验研究分析。一方面利用竖直静止实验数据对已有两相压降的计算方法进行评价,结果表明,应用于常规通道的关系式已不适用于窄通道中流动沸腾压降的计算,基于窄通道的Zhang-Mishima及Sun-Mishima关系式预测结果与实验值符合较好;另一方面得出了摇摆运动下流动沸腾阻力特性,摇摆运动使两相压降周期性波动,但摇摆角度和摇摆周期对压降的波动幅度、两相平均摩擦压降几乎无影响。

Experimental investigation and analysis of the pressure drop characteristic of flow boiling in narrow rectangular channel were conducted under rolling motion.Several correlations for the two-phase frictional pressure drop were evaluated against the experimental data.The results show that the correlations for conventional channel poorly predict the results.While the Zhang-Mishima and Sun-Mishima correlations developed for narrow channel are better than other correlations.On the other hand,the pressure drop characteristic of flow boiling was analyzed under rolling motion.The two-phase pressure drop changes cyclically due to the rolling motion,rolling angle and period almost have no effect on the fluctuation of pressure drop and the average two-phase frictional pressure drop.