环形狭缝通道中流动沸腾干涸点的实验研究

Experimental study on dryout point of flow boiling in narrow annular channel

在间隙为1mm和1．5mm的垂直环形通道内，以去离子水为工作介质，对内外管通电加热，进行了环形狭缝通道内干涸点的实验研究，实验压力范围为0．1～0．3MPa，质量流速为6～60kg／（m^2·s）．实验得到了不同质量流速对应的热流密度及其干涸点位置，并且有可再现性．实验结果表明干涸点随着质量流速的增加后移．给出了计算环形狭缝通道干涸点的计算关系式．

An experimental study on the dryout point of flow boiling in narrow annular channels with 1 mm and 1.5 mm annular gap are performed. Distilled water is used as the work fluid, the range of pressure is limited within 0. 1-0.3 MPa and that of mass flux is 6-60 kg/（m^2·s）. The locaton of dryout point with different mass flux and different heat flux is identified by experiment and the results can be attained repeatedly. The experimental results shows that the location of dryout point will shift behind with the increase of mass flux. The results are analysized and the calculation formation is reached.