用PIV数据估算槽道内湍流动能耗散率  

ESTIMATION OF TURBULENT KINETIC ENERGY DISSIPATION RATE IN CHANNEL FLOW BY PIV

作　　者：王汉封[1] 柳朝晖[1] 郭福水[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《化工学报》2004年第7期1066-1071,共6页CIESC Journal

基　　金：国家自然科学基金项目 (No 5 0 2 760 2 1);国家重大基础研究规划项目 (No G19990 2 2 0 7)共同资助~~

摘　　要：湍能耗散率的准确获取对工程实际问题和湍流的理论研究都有着重要的意义 .但由于湍能耗散率定义的固有复杂性 ,其测量一直都是一项有相当难度并具有挑战性的工作 .运用PIV对水平槽道内湍流流动进行了测量 ,详细介绍了运用大涡模拟中亚网格 (SGS)应力模型估算湍流耗散率的大涡PIV方法 ,分析了运用该方法估算湍流耗散率的优势 .将各种不同方法所得到的结果与DNS结果进行了比较 ,发现运用修正的Smagorinsky模型所得结果与其符合最好 .Accurate estimation of turbulence dissipation rate is very important for engineering and academic study of turbulence. It is challenging to measure the dissipation rate due to its complex definition. The measurement of the turbulence flow in a horizontal channel was performed by using PIV, and thus the method of using SGS model to estimate the turbulence dissipation rate was introduced and the advantage of such method was analyzed. All the estimation results were compared with the DNS's results. The outcome of the corrected Smagorinsky model fitted the DNS's results best.

关 键 词：湍能耗散率 PIV 大涡模拟 亚网格模型 湍流测量 

分 类 号：TQ021.1[化学工程] O357.5[理学—流体力学]