矩形窄缝通道内汽泡脱离直径可视化研究

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Research on Bubble Departure Diameter in Narrow Rectangular Channel

摘要: 以去离子水为介质,研究热流密度、入口过冷度和质量流速等热工参数对矩形通道内汽泡脱离直径的影响。主要参数如下:主流流体流动方向分别为竖直向上和纵倾45o,压力为0.16 MPa,质量流速G=300～700 kg/(m².s),热流密度q=27.6～228.3 kW/m²,入口过冷度ΔT_sub=20～40℃。研究发现,热流密度和入口过冷度对汽泡脱离直径的影响不明显;随着质量流速的增大,汽泡脱离直径明显减小。
- 矩形窄缝通道 /
- 汽泡脱离直径 /
- 热流密度 /
- 入口过冷度 /
- 质量流速
Abstract: The effect of heat flux,inlet sub-cooling and mass flow rate on bubble departure diameters was investigated in narrow rectangular channel using water as the working fluids.The experiment was done at pressure of about 0.16 MPa.The mass flow rate were between 300 and 700 kg/（m².s）;heat flux were between 27.6 and 228.3 kw/m²;and inlet sub-cooling were between 20 and 40℃.The bubble departure diameter was found not significantly affected by changes in heat flux and inlet sub-cooling while decreased for increasing mass flow rate.
- Narrow rectangular channel /
- Bubble departure diameter /
- Heat flux /
- inlet sub-cooling /
- Mass flow rate