进口速度和含气率对气泡液体两相湍流影响的数值研究  

Studies on the effect of inlet velocity and void fraction on bubble-liquid two-phase turbulence

作　　者：肖洪伟[1] 周力行[1] 李荣先[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《空气动力学学报》2005年第2期234-236,242,共4页Acta Aerodynamica Sinica

基　　金：国家重点基础研究专项经费资助项目G1999 0222 08.

摘　　要：气泡液体两相湍流规律的一个重要问题是,气泡究竟是加强还是削弱液体湍流,或者何时加强何时削弱液体湍流,尚有待深入探讨。本文用作者们提出的二阶矩液体气泡两相湍流模型即两相雷诺应力方程模型模拟了二维通道内气泡液体闭式多股射流在不同含气率和不同进口速度下的气泡和液体湍流脉动速度。预报结果和文献中给出的实验结果趋势一致。研究结果显示出低含气率及低进口速度下气泡增强液体湍流,高含气率及高进口速度下气泡削弱液体湍流的规律,澄清了众说纷纭的看法。One of the important problems in bubble-liquid two-phase turbulence is whether bubbles enhance or reduce liquid turbulence, it remains to be studied. In this paper, the effect of inlet velocity and void fraction on bubble-liquid two phase turbulence of multiple bubble-liquid jets in a two-dimensional channel is studied using a second-order moment two-phase turbulence model proposed by the present author. The prediction results are in qualitative agreement with the experimental results reported in references. The results indicate that at low void fraction and low inlet velocities bubbles enhance liquid turbulence, while at high void fraction and high inlet velocities bubbles reduce liquid turbulence.

关 键 词：气泡-液体流动 两相湍流 二阶矩模型 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]