水平管气液两相分层流界面剪切预测研究进展

发布时间：2018-03-15 19:47

本文选题：水平管　切入点：气液两相流　出处：《化工进展》2016年05期 　论文类型：期刊论文

【摘要】：水平管气液两相分层流虽流型简单,但由于界面存在复杂的动量和能量传递,分层流的界面剪切预测至今没有一致的结论。本文从理论模型、实验模型、数值计算3个角度出发,详细阐述水平管气液两相分层流界面剪切预测的研究现状,得出不同研究方法的优势和缺陷。针对3种研究方法,指出理论模型通过模型简化和经验关联式来建立封闭模型,实验模型则在封闭关系上修正经验关联式,但由于简化假设和实验条件的限制,使得这两种研究方法对界面剪切应力的预测具有一定的局限性;数值计算能够弥补机理模型在流场细节等方面的不足,但能够提供界面剪切预测或封闭关系的工作很少。此外,对比了5种不同形式的已有模型对气液两相分层流持液率和压降预测的结果。最后展望了水平管气液两相分层流界面剪切预测的研究趋势,提出理论和实验研究需要提出更详细的局部模型,并考虑工程实际工况进行研究,发展针对气液界面计算的新方法,并为分层流提供封闭关系则是数值计算研究面临的挑战。
[Abstract]:Although the flow pattern of gas-liquid two-phase stratified flow in horizontal pipe is simple, but because of the complex momentum and energy transfer at the interface, the prediction of interfacial shear of stratified flow has not been unanimous. From three angles of numerical calculation, the present research situation of interfacial shear prediction of gas-liquid two-phase stratified flow in horizontal pipe is described in detail, and the advantages and disadvantages of different research methods are obtained. It is pointed out that the theoretical model is established by model simplification and empirical correlation, while the experimental model modifies the empirical correlation in the closed relation, but due to the limitation of simplified hypothesis and experimental conditions, These two methods have some limitations on prediction of interfacial shear stress, numerical calculation can make up for the shortage of mechanism model in flow field detail, but there is little work to provide interfacial shear prediction or closed relation. The prediction results of liquid holdup and pressure drop of gas-liquid two-phase stratified flow with five different models are compared. Finally, the research trend of interfacial shear prediction of gas-liquid two-phase stratified flow in horizontal pipe is prospected. It is necessary to put forward a more detailed local model for theoretical and experimental research, and to consider the actual working conditions of engineering, to develop a new method for gas-liquid interface calculation, and to provide a closed relation for stratified flow, which is a challenge to the numerical calculation.
【作者单位】：辽宁石油化工大学石油天然气工程学院;
【基金】：国家自然科学基金项目(51201009)
【分类号】：TQ021.1

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