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本文用双流体模型对液态雾化燃料在直筒形燃烧室中横向喷射问题进行了数值研究 ,气相用二阶迎风TVD格式求解三维全Navier Stokes方程 ,液相用二阶预估、校正NND格式求解三维Euler方程。描述相间相互作用的常微分方程用预估、校正的二阶Runge Kutta法求解。分别考察了喷口处气相压力、相间速度滑移、液滴直径和燃烧室入口处预置的超声速流向涡对雾化燃料混合效果的影响。结果表明 :气相较液相的扩散效果好 ,小直径液滴的混合效果好 ,喷口处气相压力和超声速流向涡对增强液相混合的效果不明显 ,但会显著影响气相流场。
In this paper, a two-fluid model was used to numerically study the lateral jet of liquid atomized fuel in a straight cylindrical combustor. The second-order windward TVD format was used to solve the three-dimensional Navier Stokes equation in gas phase. The second- Three-dimensional Euler equation. The ordinary differential equation describing the phase interaction is solved by the second order Runge Kutta method which is estimated and corrected. The effects of gas phase pressure, phase velocity slip, droplet diameter and the supersonic flow direction vortex preset on the inlet of the combustion chamber on the mixing effect of atomized fuel were investigated respectively. The results show that the diffusion of gas phase is better than that of liquid phase, and the mixing effect of droplets with small diameter is good. The effect of gas phase pressure and supersonic flow vortex on the liquid mixing is not obvious, but the flow field of gas phase is significantly affected.