起伏运动对矩形窄缝通道内汽泡直径分布的影响

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Effect of Heaving Motion on Bubble Diameter Distribution in Narrow Rectangular Channel

1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;
2. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 为进一步探明起伏条件下过冷沸腾两相流相分布特性,采用高速摄像技术和数字成像分析技术,对静止和起伏条件下窄缝通道内汽泡进行可视化实验研究。实验结果表明:随着起伏频率增加,各相位间流道内汽泡直径变化增大。在相同的起伏条件下,增加质量流速将减小各相位间汽泡直径波动幅度。文中给出汽泡平均直径随起伏运动波动幅值的预测关系式,预测结果平均相对偏差为±19.1%。
- 起伏 /
- 矩形窄缝通道 /
- 过冷沸腾 /
- 汽泡直径
Abstract: In order to investigate the phase distribution in subcooled boiling under heaving condition,a visual study on forced convection subcooled water boiling experiments were conducted in narrow rectangular channels at low frequency heaving motion.Bubble diameter had been determined from high-speed digital video camera and image processing.The results show that the increasing of the frequency of heaving motion causes the increasing of bubble diameter fluctuation.Under the same heaving condition,the increasing of mass flow rate leads to the decreasing of bubble diameter fluctuation.A correlation has been sought for the fluctuation of bubble diameter due to heaving motion.The proposed model agreed with the experimental data within the averaged relative deviation of ±19.1%.
- Heaving motion /
- Rectangular channel /
- Sub-cooled boiling /
- Bubble diameter