航天推进技术研究院主办
TANG Liang,WANG Kai,LIU Jiwu,et al.Influence of liquid film cooling on combustion efficiency of rocket engine[J].Journal of Rocket Propulsion,2023,49(03):69-75.
液膜冷却对火箭发动机燃烧效率的影响
- Title:
- Influence of liquid film cooling on combustion efficiency of rocket engine
- 文章编号:
- 1672-9374(2023)03-0069-07
- 分类号:
- V434+.3
- 文献标志码:
- A
- 摘要:
- 液膜冷却对发动机热防护和性能均有重要的影响,为了研究不同液膜注入条件对燃烧效率的影响,开展了燃烧室液膜冷却热试试验研究。试验中改变了射流流量、冷却孔的数量、射流倾角,并测量了两排分别位于正对冷却孔位置和两冷却孔之间位置的燃烧室壁温,计算了不同工况下的燃烧效率。结果表明:推力室点火后,液膜的注入会压低温度曲线上升的斜率; 在热试实验研究中,在相同的液膜流量下,不同的液膜注入方式并未对燃烧效率产生显著的规律性影响; 头部混合比在3.6附近时,液膜流量占燃烧室总流量的百分比每提高2.3%,则燃烧室的燃烧效率降低约1%。
- Abstract:
- Liquid film cooling has important influence on the thermal protection and the engine performance. In order to study the effect of different liquid film injection conditions on the combustion efficiency, a thermal test study of liquid film cooling in the combustion chamber was carried out. In the test, the jet flow rate, the number of cooling holes, and the jet inclination angle were changed, the wall temperature of the combustion chamber at the position facing the cooling holes and between the two cooling holes was measured, and the combustion efficiency under different working conditions was calculated. It was found that after the ignition of the thrust chamber, the injection of the liquid film will reduce the slope of the temperature curve. In the experimental study, under the same liquid film flow rate, different liquid film injection methods did not have significant regular effects on the combustion efficiency. When the oxygen-fuel ratio of the head is around 3.6, for every 2.3% increase in the percentage of liquid film flow in the total flow of the combustion chamber, the combustion efficiency of the combustion chamber reduces byabout 1%.
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备注/Memo
收稿日期:2022-07-31; 修回日期:2022-08-31
基金项目:国家自然科学基金项目(11502186)
作者简介:唐亮(1991—),男,博士,研究领域为燃烧与传热。