气-粒两相流对燃气舵工作性能的影响

为了研究气-粒两相流对固体火箭发动机燃气舵的影响,基于固体火箭发动机燃气舵的工作特点,在求解二维Navier-Stokes(N-S)方程的基础上,分别对有无颗粒相的流场进行了数值模拟,并且考虑了颗粒直径为1,10μm和30μm,颗粒质量分数为15%,20%和30%,舵偏角为0°,5°,10°及15°的各种组合工况.结果表明,在相同外界条件下,有颗粒相时舵表面的压力要大于无颗粒相时的表面压力,而且这种差别在迎风面和舵片前半部分表现得比较明显;在气动性能方面,有颗粒相时升力和阻力都要比无颗粒相时大,这种差别随颗粒直径的增大而减小,在一定颗粒质量分数范围内,随颗粒质量分数的增加而增大. 

Effect of gas-particle two-phase flow on jet vane performance

In order to study the effect of gas-particle two-phase flow on the jet vane performance based on the working characteristics of solid rocket motor jet vane,the flow field and aerodynamic performance of jet vane with or without particle was researched by solving the two-dimensional Navier-Stokes equation.In the research,three different diameters of particle 1,10 μm and 30 μm,three different mass fractions 15%,20% and 30%,different vane deflection angles 0°,5°,10° and 15° were considered.The results show that,the pressure of jet vane surface with particles is higher than that without particles,and the difference on the windward and the front part of the jet vane is evident.For the aerodynamic performance,the lift and drag with particles are larger than those without particles,in addition,the difference decreases with the increase of particle diameter,and increases with the growing particle mass fraction under a special particle mass fraction.