模型燃烧室湍流亚网格尺度模型  

Sub-grid Scale Model for Model Combustor

作　　者：颜应文[1] 赵坚行[1] 张靖周[1] 刘勇[1] 党新宪[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：《南京航空航天大学学报》2009年第4期461-465,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：高等学校博士学科点专项科研基金(20070287041)资助项目

摘　　要：分别采用Smagorinsky-Lilly和k方程亚网格尺度模型,在任意曲线坐标系下对模型燃烧室湍流流场进行大涡模拟。分别用QUICK和二阶隐式差分格式离散控制方程及其时间项,并用SIMPLE算法进行求解。计算结果与PIV测量数据比较表明:大涡模拟方法能较好模拟旋流器后面回流区的瞬态变化,两种亚网格尺度模型都能较好模拟湍流流动,但k方程亚网格尺度模型稍优于Smagorinsky-Lilly亚网格尺度模型,因此采用k方程亚网格模型更适用于大涡模拟实际燃烧室复杂湍流流场。In three-dimensional arbitrary curvilinear coordinates, large eddy simulations of turbulent flows in a model combustor are studied by Smagorinsky-Lilly sub-grid scale model and k-equation subgrid scale model. QUICK scheme is used for the discretization of convective transport terms. Second-order implicit temporal discretization is applied for time terms, and discrete equations are solved by SIM- PLE algorithm. The instantaneous change of the recirculation zone behind the swirler can be revealed by a large eddy simulation. Calculations of the velocity vector and fluctuating velocity distributions are compared with corresponding experimental data using particle image velocimetry（PIV）. The result shows that both sub-grid scale models can exhibit the complicated turbulence structures and the k-equation sub-grid scale model is better than the Smagorinsky-Lilly sub-grid scale model.

关 键 词：亚网格尺度模型 任意曲线坐标 湍流流场 粒子图像测光 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]