【摘要】 在内径为80mm的大型多相流实验环道上,深入研究了高气相流速下气液分层流压力梯度和截面含气率特性,截面含气率采用双能伽马射线密度仪测量.通过对相间剪切应力的研究,提出应用气相动量方程计算压力梯度和界面含气率.采用FLAT、ARS、MARS3种界面形状模型计算了水平管气液两相分层流压力梯度和截面含气率,并将计算结果与实验结果进行了对比分析,ARS和MARS模型的预测结果接近且误差小,因此推荐采用ARS或MARS模型预测高气相流速分层流压力梯度和截面含气率.更多还原

【Abstract】 Extensive experiments were conducted with a largescale multiphase flow test loop made of 80 mm diameter stainless steel pipe. Experimental results was presented for pressure drop and void fraction in gasliquid twophase stratified flow at high gas velocity. The void fraction was measured using a dual energy gamma ray densitometer. The method that the pressure gradient and void fraction were determined from gas phase momentum balance was put forward. Three kinds of interfacial shape models (FLAT, ARS, MARS) are adopted to calculate the pressure gradient and void fraction in horizontal gasliquid twophase stratified flow. The results calculated are compared with the experimental data to evaluate three models. The ARS and MARS models generally give better predictions within the experimental range. They are recommended to predict the pressure gradient and void fraction for stratified flow at high gas velocity.更多还原