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用Eulerian-Lagrangian方法对高温气流内顺/逆流喷雾过程进行了数值仿真。气相方程用Eulerian方法建立,用k-ε模型封闭;液滴相方程用Lagrangian方法建立,采用了随机轨道模型;考虑了气体和液滴间的双向耦合。结果表明,高温气流内喷雾后,气相流场内产生了速度亏损和温度亏损,气体出口压力变化不大,液滴运动决定于气流湍流强度和自身惯性力,液滴在气道内的停留时间决定于液滴运动特性和气流湍流强度;逆流喷雾对气流的影响比顺流喷雾时大。仿真结果与文献结果基本一致。
The Eulerian-Lagrangian method was used to simulate the forward / reverse flow in high temperature gas flow. The gas phase equation is established by the Eulerian method and closed by the k-ε model. The droplet phase equation is established by the Lagrangian method. The stochastic orbit model is adopted. The bidirectional coupling between the gas and the droplet is considered. The results show that the velocity of gas loss and temperature loss in the gas flow field after sprayed in the high temperature gas flow have little effect on the gas outlet pressure. The droplet motion is determined by the turbulent intensity of the gas flow and its own inertial force. The residence time of the droplet in the airway is determined In the droplet movement characteristics and turbulent flow intensity; counter-flow spray on the air flow than the downstream spray large. The simulation results are basically consistent with the literature results.