环形窄缝通道中沸腾压降的实验研究

Experimental Study on Pressure Drop of Flow Boiling in the Vertical Narrow Annuli

在1.5～6.0MPa压力下,通过内外管通电双而加热流体,对间隙为1.0mm和1.5mm垂直环形窄缝通道内饱和沸腾状态下的压降进行实验研究。通过实验得出了新的分液相摩擦倍增因子公式,用该公式得到的计算结果与实验数据符合较好,平均误差为11．6％。

Experimental study associated with two-phase flow of boiling in the vertical narrow annuli with the gap width of 1.0 and 1.5mm has been conducted. The test section can be simultaneously heated from inner and outer tubes by electricity. The system pressure range examined is from 1.5 to 6.0 MPa. Based on the experimental data, a new correlation of two-phase multiplier, which is based on single liquid phase flow in the ducts, has been developed. The new correlation can predict the experimental data well and the mean deviation is 11.6%.