关键词: 超声速流;液滴;液体雾化;气体液体互作用;数值模拟

Abstract: A code applied for kerosene spray in supersonic flow has been developed, in which Eulerian-Lagrangian method was adopted to describe two-phase flow, a stochastic particle method was used to calculate the liquid sprays. Meanwhile, the effect of gas compressibility, pressure gradient and the droplet distortion on the droplet motion has also been considered. It was found that there is strong interaction between the airflow and the kerosene spray. Initial parent drops are broken up into small drops soon after they enter the supersonic cross flow. Moreover, a bow shock wave is captured ahead of the kerosene jet. And the speed and the temperature of airflow decrease due to aerodynamic effect and droplets evaporation. The comparison of the numerical results with the Schlieren images of spray structure and experimental data of spray penetration showed good agreement.

Key words: Supersonic flow;Drop;Liquid atomization;Gas-liquid interaction;Numerical simulation