含铝HTPB固液混合推进燃料燃烧性能研究

Study on Combustion Performance of HTPB-Based Fuels Containing Aluminum Particles for Hybrid Propellant

关键词:  固液混合推进燃料  铝粒子  燃烧特性  退移速率

Key words:  Hybrid propulsion fuel  Aluminum particles  Combustion characteristic  Regression rate

摘要:

为了研究铝粒子对HTPB固液混合推进燃料退移速率的影响，采用透明燃烧室实验系统，开展了含不同粒径(平均粒径分别为100nm，500nm和50μm)、不同质量分数(5wt%，10wt%和15wt%)的铝粒子HTPB燃料退移速率测试和分析，获取了燃烧室压力为1MPa下的含铝HTPB燃料的瞬时退移速率随氧气质量密流变化的曲线。研究结果表明，随着氧气质量密流的增加，含铝HTPB燃料的退移速率增加；当氧气质量密流为250 ~ 375 kg/(m2·s)和铝粒子含量为5wt %时，平均粒径为500nm比平均粒径为100nm和50μm的含铝HTPB燃料退移速率高；当铝粒子平均粒径为500nm时，含铝HTPB燃料的退移速率随着铝粒子含量的增加而增加。

Abstract:

In order to investigate the effects of the aluminum particles on the combustion performance of HTPB-based fuels for hybrid propellant， a transparent combustion chamber experimental system was used in this study. HTPB-based fuel containing different particle size (average size is 100nm， 500nm and 50μm) and different mass fraction (5wt%， 10wt% and 15wt%) of aluminum particle respectively were tested and analyzed. The curves of regression rate vs. oxygen mass flux for HTPB-based fuel containing aluminum particles were obtained under the combustion chamber pressure of 1.0MPa. The results showed that the regression rate of HTPB-based fuel containing aluminum particles increased with the increase of the oxygen mass flux. The regression rate of HTPB-based fuel containing 5wt% 500nm aluminum particles was higher than that of HTPB-based fuel containing 5wt% 100nm and 50μm aluminum particles under oxygen flux 250 ~ 375kg/(m2·s). The regression rate of HTPB-based fuel containing 500nm aluminum particles increased with the increase of aluminum particle content.