矩形窄缝通道内滑移汽泡直径沿轴向分布特性实验研究

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Distribution of Sliding Bubble Diameter along Axial Direction in Narrow Rectangular Channel

1. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China;
2. Longyan Electric Power Bureau, Fujian Electric Power Company Limited, Longyan, Fujian, 364000, China

摘要: 采用高速摄像仪对矩形窄缝通道内过冷流动沸腾滑移汽泡直径沿轴向分布特性进行可视化实验研究。实验捕获滑移汽泡沿加热面滑移并聚合的过程图像,并获得沿加热面轴向300、400、500 mm处滑移汽泡直径概率分布图。实验研究表明,窄缝通道中滑移汽泡直径沿轴向分布呈增大趋势;滑移汽泡沿加热面生长、滑移汽泡与未完成生长脱离的小汽泡的聚合,以及滑移汽泡间的聚合是滑移汽泡直径沿加热面轴向增大的重要原因。
- 矩形窄缝 /
- 过冷流动沸腾 /
- 汽泡 /
- 滑移 /
- 聚合
Abstract: A visual study on forced convection subcooled water boiling experiments was conducted.A high speed camera was used to capture the distribution of sliding bubble diameter along axial direction in the narrow rectangular channel.The consecutive images of sliding bubbles coalescence were captured.Bubble diameter distribution on axial direction of 300,400 and 500 mm was achieved.The results show that the in-creasing of the axial direction causes the increasing of the sliding bubble diameter.The growth of sliding bubble along heating surface,the coalescence of bubbles between slipping bubble and the wall-attached bub-ble,and the coalescence of slipping bubbles are the main reason.
- Rectangular narrow channel /
- Subcooled boiling /
- Bubble /
- Sliding /
- Coalescence