药柱含扰流板H2O2/HTPB固液火箭发动机 两相流数值计算

研究了药柱中添加扰流板对固液火箭发动机燃烧性能的影响,以北京航空航天大学φ100mm标准固液火箭发动机为计算模型,针对98%H₂O₂/HTPB(过氧化氢/端羟基聚丁二烯)推进剂组合,采用二维轴对称气液两相模型计算了不同药柱位置、不同孔径尺寸的扰流板对固液火箭发动机燃烧性能的影响.结果表明:孔径尺寸更小的扰流板且置扰流板于药柱长度的50%~70%时,平均燃料退移速率最大,燃烧效率最高,这将为扰流板设计提供理论依据. 

Two-phase flow numerical calculation of H2O2/HTPB hybrid rocket engine with diaphragm in grain

The effect of diaphragm in grain on combustion performence of hybrid rocket engine was studied.The standard φ 100mm hybrid rocket engine of Beijing University of Aeronautics and Astronautics was selected as a computational model,and 98% hydrogen peroxide(H₂O₂)/hydroxyl terminated polybutadiene (HTPB) was combined as propellant;different hole diameters of diaphragm setting at different grain positions were computed by 2-D axial symmetry and gas-liquid two-phase flow model.The results show that smaller diameter of diaphragm hole and the diaphragm setting at positions ranging from 50% to 70% of grain length can obtain the largest averaged regression rate of fuel and the highest combustion efficiency.This conclusion will provide a theory evidence for design of the diaphragm.