【摘要】 建立了固体火箭发动机喷焰的气固两相流计算模型,对不同Al2O3颗粒含量及粒径喷焰流场的两相流进行了数值模拟。研究了固相颗粒Al2O3对发动机喷焰流场参数分布的影响。结果表明:Al2O3颗粒含量的增大会使喷焰流场的温度升高、速度降低,特别在轴线处表现的尤为明显。Al2O3颗粒粒径越小,其随流性越好,在喷焰中更加分散,喷焰轴线处的温度随着Al2O3颗粒粒径的增大而升高;当平均粒径相同时,喷焰流场参数分布还受Al2O3颗粒粒度分布规律的影响。更多还原

【Abstract】 The calculation model for solid gas? two phase flow of plume was established and numerical simulations were conducted to investigate the influences of aluminum oxide content and particle size on rocket exhaust plume. It shows that( a) the temperature of plume increases with the increase of aluminum oxide content,especially at the center of plume;( b) the flow of aluminum oxide is better with smaller particle size,and the temperature in the center of plume rises up when the size of aluminum oxide particle increases;( c) even if the average particle size is the same,the influence of aluminum oxide on plume is different with different particle size distributions.更多还原