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.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第2期237-239,共3页
Journal of Engineering Thermophysics
关键词
倾斜冲击射流
湍流模型
数值分析
流场结构
oblique impinging jet
turbulence model
numerical analysis
flow field structure
