贴体坐标系下模型加力室的大涡模拟  

BODY-FITTED COORDINATE SYSTEMS FOR LARGE-EDDY SIMULATION OF THE MODEL AFTERBURNER

作　　者：颜应文[1] 赵坚行[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《工程热物理学报》2005年第3期531-533,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50176017)

摘　　要：本文利用贴体网格对带V形槽稳定器模型加力燃烧室素流化学反应流流动进行大涡模拟的研究。采用区域法生成模型加力燃烧室的二维贴体网格,并采用多区域耦合法进行区域之间的数据传递,求解加力室整体流场。采用k方程亚网格尺度模型和亚网格EBU燃烧模型分别估算其亚网格紊流粘性和化学反应速率,用热通量辐射模型估算辐射通量,并用交错网格下SIMPLE算法和混合差分格式求解离散方程,壁面函数处理固壁边界条件。计算结果显示了稳定器后面的回流区气流结构,所得的热态流场模拟结果与实验比较吻合,表明采用贴体网格对模型加力燃烧室进行大涡模拟能真实反映流体流动及燃烧过程。In this paper, the k-equation subgrid-scale model is used for the large-eddy simulation (LES) of turbulent chemically reacting flows in the model afterburner with the V-gutter flame holder. Two dimensional body-fitted grid is generated by using the zonal methods, the EBU combustion subgrid-scale model is employed to determine the chemical reaction rate, the heat flux model is applied to prediction of the heat flux, SIMPLE algorithm and hybrid scheme are used with the staggered grid system, wall function is applied to treating near wall region. From the results of the numerical simulation, the recirculation zone is found behind the V-gutter flame holder. The experiments are preformed in the combustion laboratory. The numerical results are well agreement with experimental measurements of temperature. The results show that the large-eddy simulation method by body-fitted grid may be used to investigate reacting flows and combustion process in practical combustors.

关 键 词：大涡模拟 贴体网格 南方程亚网格尺度模型 亚网格EBU燃烧模型 

分 类 号：TK16[动力工程及工程热物理—热能工程]