Numerical and experimental analysis of heat transfer in injector plate of hydrogen peroxide hybrid rocket motor

被引:36
作者
Cai, Guobiao [1 ]
Li, Chengen [1 ]
Tian, Hui [1 ]
机构
[1] Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China
关键词
Hybrid rocket motor; Hydrogen peroxide; Heat transfer; Thermal protection; REGRESSION RATE; COMBUSTION; SIMULATION; ENGINES; DESIGN;
D O I
10.1016/j.actaastro.2016.05.041
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
This paper is aimed to analyze heat transfer in injector plate of hydrogen peroxide hybrid rocket motor by two-dimensional axisymmetric numerical simulations and full-scale firing tests. Long-time working, which is an advantage of hybrid rocket motor over conventional solid rocket motor, puts forward new challenges for thermal protection. Thermal environments of full-scale hybrid rocket motors designed for long-time firing tests are studied through steady-state coupled numerical simulations of flow field and heat transfer in chamber head. The motor adopts 98% hydrogen peroxide (98HP) oxidizer and hydroxyl terminated poly-butadiene (HTPB) based fuel as the propellants. Simulation results reveal that flowing liquid 98HP in head oxidizer chamber could cool the injector plate of the motor. The cooling of 98HP is similar to the regenerative cooling in liquid rocket engines. However, the temperature of the 98HP in periphery portion of the head oxidizer chamber is higher than its boiling point. In order to prevent the liquid 98HP from unexpected decomposition, a thermal protection method for chamber head utilizing silica-phenolics annular insulating board is proposed. The simulation results show that the annular insulating board could effectively decrease the temperature of the 98HP in head oxidizer chamber. Besides, the thermal protection method for long-time working hydrogen peroxide hybrid rocket motor is verified through full-scale firing tests. The ablation of the insulating board in oxygen-rich environment is also analyzed. (C) 2016 IAA. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:286 / 294
页数:9
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