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用基于控制体的有限差分方法对一排射流横向喷入管流的流场进行了数值分析 ,以建立流场温度分布和上游流动条件及几何参数的关系。可变的参数包括 :喷嘴直径 ,喷嘴数 ,圆柱管半径 ,射流与主流的体积流量比、温度比和动压比。结果发现 ,动压比、喷嘴个数和喷嘴间距是三个重要变量。通过对模拟结果的函数拟合 ,发现射流喷射深度与动压比除以喷嘴数的平方之间的关系可用一个对数函数很好地描述。给出了适于最佳混合的喷射深度和喷嘴间距 ,提出了可用于结构初步设计的程序
The flow field of a row of jet flow in a horizontal jet flow is numerically analyzed by the finite difference method based on the control body to establish the relationship between the flow field temperature distribution and the upstream flow conditions and geometrical parameters. Variable parameters include: nozzle diameter, number of nozzles, tube radius, jet-to-main volume flow ratio, temperature ratio and dynamic pressure ratio. The results showed that the dynamic pressure ratio, the number of nozzles and nozzle spacing are three important variables. By fitting the simulation results, it is found that the relationship between the jet injection depth and the dynamic pressure ratio divided by the square of the number of nozzles can be well described by a logarithmic function. Given the optimal jet depth and nozzle spacing for the optimum mix, a procedure is available for preliminary design of the structure