颗粒对各向同性湍流中温度场的影响  

Effect of particle on temperature field in isotropic turbulence

作　　者：贺铸[1] 柳朝晖[2] 刘亚明[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《武汉科技大学学报》2009年第4期342-346,共5页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(50576027)

摘　　要：为考察各颗粒参数对颗粒与气相温度场间相互作用的影响,对非等温气固两相各向同性湍流进行直接数值模拟。结果表明,在具有温度梯度的各向同性湍流中,加大颗粒质量载荷可使气相温度脉动强度和温度耗散率单调递减,加大颗粒质量载荷和颗粒比热均可使温度场的概率密度函数明显偏离高斯分布。Direct numerical simulations were conducted to investigate the effects of various particle parameters on the interaction between particle and temperature field of fluid flow in isotropic turbulence with a mean temperature gradient. The results show that with increasing particle mass loading, the fluid temperature intensity and the dissipation rate of the fluid temperature decrease linearly, and raising the particle mass loading or specific heat can lead the probability density function of the temperature field away from Gaussian distribution in an obvious way.

关 键 词：非等温气固两相湍流 直接数值模拟 温度耗散率 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]