倾斜入射的横向紊动射流温度场的数值模拟

Numerical Simulation of Temperature Fields of Jet Issuing Unmorally into a Cross Flow

基于控制容积法,采用Realizablek-ε湍流模型对135°倾斜入射的横向紊流射流流场下游的流动和传热特性进行了数值模拟。通过比较和分析不同吹风比对横向紊动射流温度场的影响,结果表明:随着吹风比的减小,射流对主流温度场的影响范围沿垂直方向和沿横向减小;低速度比时,射流对近下游区壁面附近的温度场的影响较大,但对远下游区的影响并不好于较高吹风比的情况;在不同的吹风比时,近下游区受到射流的影响都是最大的,且射流在近下游区域的流动发生了分叉现象。

To investigate the flow and heat transfer characteristics downstream of round jet unnormally issuing into a cross flow,flow fields with 135° injection angles had been numerically simulated, based on control volume method and Realizable k-ε model. Through comparing and analyzing the temperature fields of different blowing ratios,the results suggest that the smaller blowing ratio is,the zone of jet and cross flow occurs in the vertical and spanwise is less influenced;with smaller blowing ratio,the influenced zone of the temperature field in the near downstream with lower blowing ratio is less than the greater blowing ratio~;as different blowing ratios,near downstream is mostly influenced by the jet and the flowing is fraction in there.