平面倾斜冲击射流场的数值分析  

NUMERICAL ANALYSIS OF A PLANAR OBLIQUE IMPINGING JET FLOW FIELD

作　　者：陈庆光[1] 徐忠[2] 吴玉林[1] 张永建[3] 

机构地区：[1]清华大学热能工程系,北京100084 [2]西安交通大学流体工程系,陕西西安710049 [3]山东科技大学,山东青岛266510

出　　处：《工程热物理学报》2005年第2期237-239,共3页Journal of Engineering Thermophysics

摘　　要：采用SIMPLE算法和RNGk-ε湍流模型,对平面射流倾斜冲击平板的半封闭空间内的流场进行了数值分析。针对喷口宽度B=10mm、冲击高度H=2B和射流雷诺数Re=20000的流场,分别得到了三种射流倾角下的速度、流函数、压力和湍动能分布。计算结果表明,射流倾角的变化对流场结构具有显著的影响。当倾角减小时,左侧回流区变小,而右侧回流区变大,最大压力区和最大湍动能区都随着滞止点的左移向流场的左侧移动。The SIMPLE algorithm and an RNG based k-ε turbulence model are used to numerically analyze the semi-confined flow field of a planar jet impinging obliquely on a flat plate. The velocity, stream function, pressure and turbulent Kinetic energy distributions are solved for three oblique impingement angles with nozzle width of B = 10 mm, plate-to-plate spacing of H = 2B and jet Reynolds number of Re = 20000. The numerical results show that the impinging jet flow field is significantly affected by the oblique impingement angle. As the oblique angle decreases, the size of the left side recirculation zone is smaller than that of the right one. The locations of the maximum pressure zone and the maximum turbulent Kinetic energy zone all move towards the left with the movement of the stagnation point.

关 键 词：倾斜冲击射流 湍流模型 数值分析 流场结构 

分 类 号：TK124[动力工程及工程热物理—工程热物理]