首页|Numerical research on mixing combustion characteristic of vortex flow pancake hybrid rocket motor
Numerical research on mixing combustion characteristic of vortex flow pancake hybrid rocket motor
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NETL
NSTL
Elsevier
Vortex flow pancake hybrid rocket motor has advantages of compact structure, high combustion efficiency and little shift of oxidizer-to-fuel ratio, which bringing it broadly application prospect in hybrid propulsion system of micro/nano satellite. In order to optimize design and improve performance, it is essential to have a deeper understanding of the mixing combustion characteristics in vortex flow pancake hybrid rocket motor. In this paper, three-dimensional numerical simulation was conducted to investigate the mixing combustion characteristic of vortex flow pancake hybrid rocket motor through a pressure-based finite volume solver based on the OpenFOAM. The heat transfer process between the solid fuel and the combustion flow field was considered and fire experiment was carried out to validate the solver by a lab scale motor. On this basis, the effect of diameter, number and angle of oxidizer injection orifice on flow characteristic, flow field distribution, fuel regression rate and combustion performance of vortex flow pancake hybrid rocket motor were evaluated. The results indicate that high injection velocity of oxidizer can extremely enhance the mixing of oxidizer and fuel gas in combustion chamber, which further improve the combustion efficiency. However, the fuel consumption along the oxidizer flow path also significantly increases and results in uneven fuel profile on grain surface. Increasing the number of oxidizer injection orifice can make this problem caused by oxidant flow get some mitigated, and the mixing and combustion performance of the motor are slightly reduced as the number of oxidizer injection orifice increasing. Too large or small injection orifice angles seem both not conducive to the mixing and combustion in combustion chamber. When the injection orifice angle is 30°, the characteristic velocity and combustion efficiency are maximum.
Zhiyuan Zhang、Wenhe Liao、Hanyu Deng、Yu Cheng、Yongzhe Xie、Wenjun Hu
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School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China||School of Mechanical Engineering, Key Laboratory of Special Engine Technology, Ministry of Education, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
Yibin Northern Chuan'an Chemical Co., Ltd. Tibin, Sichuan 644219, China
NETL
NSTL
Elsevier
