池水瞬态闪蒸时间的实验研究

EXPERIMENTAL INVESTIGATION ON FLASHING DURATION TIME

实验研究了过热度、初始水温及水位高度对方腔内池水瞬态闪蒸时间的影响。实验条件为:水位高度40 mm、60 mm、100 mm,初始水温36～88℃,过热度2.1～48℃。实验结果表明:过热度及水位高度是影响闪蒸时间的主要因素,过热度及水位高度越大,闪蒸时间越长;过热度相同时,初始水温对闪蒸时间的影响很小。通过对实验数据分析,拟合出瞬态闪蒸时间的计算关联式。

An experimental study has been performed to investigate pool water instantaneous flash evaporation in a rectangle chamber. Some key parameters such as superheat, initial water temperature and water level have been studied. The water level was at 40 mm, 60 mm, 100 mm, 150 mm. Initial conditions of the liquid varied from 36℃ to 88℃ temperature and 2.1℃ to 48℃ superheat. The experimental results showed that the initial water temperature, the superheat and the water level are the key parameters. The experimental results showed that the greater the superheat and the higher the initial water level approaches, the longer the flashing will persist. Under a constant superheat, the initial water temperature has little influence on duration of flashing. Experimental study allows us to correlate the flashing duration time with the superheat and the initial water level as well as the initial water temperature.