气液两相瞬变流数值计算及试验研究

在气液两相流计算中，人们通常给出气泡在液体中均匀分布的，与工程实际不符的假设，致使计算与试验结果之间相差较大。两相瞬变流计算也常看作均质的单相流来处理．本文由试验求得不同空间系数与波逐关系曲线，取消了均匀分布假设，改进了特性曲线法以适用于非均质的两相流计算，并将计算值与试验值进行比较，结果表明两者吻合得较好。

NUMERICAL CALCULATION AND EXPERIMENTAL STUDY OF THE GAS-LIQUID TRANSIENT FLOW

Previously, the calculation of gas-liquid transient flow was made on the assumption that the gas bubble was evenly-separated in the liquid which is hard to get in engineering practice. This kind of assumption led to great difference between calculation result and that of experiment. Furthermore, the two-phase flow transients were always treated as homogeneous one-phase flow. The topic that by changing the characteristic to apply for two-phase flow calculation has not been found in previous documents. In this paper, different void efficient and speed relation curves are got by experiments, the evenly-diffused assumption is discarded and the characteristics method is modified to fit for the calculation of two-phase flow without assuming the flow to be equally-separated. The compare and contrast of the results between experiments and calculation demonstrates they are nearly the same.