摇摆运动对窄通道内汽液界面参数的影响

Effect of Rolling Motion on Liquid-Vapor Interface Area Parameter in A Narrow Channel

对摇摆运动下矩形窄通道内的过冷沸腾流动进行实验研究,通过数字图像处理技术计算出空泡份额和界面面积浓度等界面参数的变化规律,并分析影响界面参数波动的主要因素。实验结果表明,矩形窄通道内汽液界面参数受摇摆运动影响产生周期性波动,且波动周期与摇摆运动周期相同。摇摆运动下空泡份额和界面面积浓度的波动主要受汽泡等效直径变化的影响。

The subcooled flow boiling in a narrow rectangular channel under rolling motion was experimentally studied. The variation of interfacial parameters were obtained by adopting the digital image processing technology, such as the void fraction and the interfacial area concentration. The experimental results showed that these interfacial parameters in the narrow channel were periodically fluctuated due to the effect of rolling motion, and the period was identical with that of rolling motion. The fluctuation of the void fraction and interfacial area concentration under rolling motion was mainly affected by the variation of bubble equivalent diameter.