卧式矩形截面螺旋通道内气液两相流压力降特性研究

Rearch of Pressure Drop of Gas-Liquid Two Phase Flow within Spiral Channel with Horizontal Rectangular Section

以空气和水为工质,对卧式矩形截面螺旋通道内气-液两相流动压降特性进行了实验研究.对实验结果进行了分析,分别对比了均相模型和分相模型的计算关联式.结果表明,均相模型的计算关联式不适用于卧式矩形截面螺旋通道内两相流压降的计算,而分相流模型整体吻合较好,但实验值和预测值仍有较明显误差.为此结合实验数据,以Lockhart-Martinelli分相模型为基础,提出了一种新的两相流动摩擦阻力压力降的计算式,与实验数据的误差较小,能够很好的预测本试验段的实验结果.

Taking air and water as the working medium,the gas-liquid two-phase pressure drop in spiral chan-nel with horizontal rectangular section was experimentally studied. The experimental results of two-phase flowwere compared with the homogeneous model and the separated flow model. The results showed that the homoge-neous model was not suitable for the calculation of two-phase flow pressure drop in the spiral channel of hori-zontal rectangular section. The separated flow model can predict the results well,but the error between experi-mental and predicted data was still obviously. Therefore,an improved correlation based on the Lockhart-Marti-nelli model was proposed to predict the two-phase pressure drop. The predicted data of this new correlationwere compared with the experimental data,the results showed that this new correlation can predict the experi-mental data well.