摘要
本文详细讨论了一个用来模化气-液两相泡状流的K—ε紊流模型推广形式。该模型将两相流中的紊流扰动分解成剪切力诱导和气泡诱导两个部分,并假设两者是可以线性叠加的。由此引出了两个时间常数模型,该模型与均匀两相紊流数据和管流数据符合很好。模型中各系数仍使用单相K—ε模型的形式,只新引入了气泡虚拟容积系数这一参数。运用该模型不但可令人满意地计算紊流各量的变化趋势,而且可预报紊流扰动的衰变特性。
In this paper, An extension of the K- ε turbulent model as introduced for the modeling of gas-liquid two-phase bubbly flow, in which the two-phase turbulence was divided into two-parts, that is , the shear-induced turbulence and bubble-induced turbulence. On the assumption that the coupling between shear-induced and bubble-induced fluctuations is weak and may be linearly superposed, a model for dilute bubbly flow with two time constants has been induced, that matches both homogeneous two-phase turbulence data and pipe data. And the coefficients of the single-phase K -ε model have been used and only an additional coefficient. i. e, the virtual volume coefficient of the bubbles has been introduced in this model. By using it not only the turbulence data trends but also the turbulence supression can been predicted.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1994年第2期234-243,共10页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金资助项目
关键词
泡状流
湍流扰动
两相流
gas-liquid two-phase bubbly flow, turbulence prediction, K-ε model
