液固两相槽道流中湍流调制的数值研究  

Simulation of Turbulence Modulation in Liquid/Solid Particle-Laden Channel Flows

作　　者：侯金亮[1] 王力[1] 李昌烽[1] 

机构地区：[1]江苏大学能源与动力学院,江苏镇江212013

出　　处：《力学季刊》2015年第3期391-398,共8页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(11072091);教育部科学技术研究重点项目(210078)

摘　　要：结合雷诺应力模型(Reynolds Stress Model,RSM)和混合模型(Mixture Model)对槽道湍流向下流动中的颗粒调制湍流问题进行了研究.该模型考虑了颗粒流的动能理论和颗粒对湍流的反馈作用.着重分析了颗粒对湍流的调制作用,以及颗粒参数变量(如颗粒密度和质量载荷)对湍流调制的影响.结果表明:(1)在颗粒抑制湍流的范围内,当颗粒密度小于载流体密度时,湍流强度的改变量与颗粒密度成反比;当颗粒密度大于载流体密度时,湍流强度的改变量与颗粒密度成正比;(2)在一定范围内,颗粒抑制湍流的能力随颗粒质量载荷增加而变强.The Reynolds Stress Model （RSM）, combined with the Mixture model, was used to investigate the phenomenon of turbulent modulation in particle-laden downwards channel flow, where the granular theory for particulate flow and the feedback of particles on turbulence were considered. The focus of the investigation was rested on the damping effect of particle on turbulence and the influences of particle variable parameters （i.e., particle density and mass loading） on the attenuation effect. Results show that： （1） within the range of turbulence being damped by particles, the magnitude of turbulence attenuation for particulate flows decreases with the increase of particle density when the particle density is less than that of fluid surround compared with the unladen eharmel flow; however, as the particle density is larger than that of the cartier phase, the variation of turbulent intensity is proportional to the particle density; （2） within certain limits, the attenuating effect of particle on turbulence is enhanced when the particle mass loading is increased.

关 键 词：液固两相流 雷诺应力模型 混合模型 湍流调制 湍流强度 

分 类 号：O35[理学—流体力学]