航天推进技术研究院主办
[1]高兴峰,张建伟,孙 冰,等.推力室头部最优气膜参数研究[J].火箭推进,2018,44(02):10-17.
GAO Xingfeng,ZHANG Jianwei,SUN Bing,et al.Study on optimal gas film parameters of near-injection region in thrust chamber[J].Journal of Rocket Propulsion,2018,44(02):10-17.
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GAO Xingfeng,ZHANG Jianwei,SUN Bing,et al.Study on optimal gas film parameters of near-injection region in thrust chamber[J].Journal of Rocket Propulsion,2018,44(02):10-17.
推力室头部最优气膜参数研究
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
44
期数:
2018年02期
页码:
10-17
栏目:
研究与设计
出版日期:
2018-04-30
- Title:
- Study on optimal gas film parameters of near-injection region in thrust chamber
- 文章编号:
- 1672-9374(2018)02-0010-08
- Keywords:
- thrust chamber; numerical simulation; orthogonal test method; cooling efficiency; combustion efficiency
- 分类号:
- V434.2-34
- 文献标志码:
- A
- 摘要:
- 为了获得影响氢氧火箭发动机推力室头部气膜冷却的最佳参数,针对气膜冷却多喷嘴气气燃烧推力室模型进行了三维数值模拟。数值模型采用了标准k-ε湍流模型、涡耗散概念模型分别模拟湍流及燃烧过程。采用正交试验法对不同气膜参数进行系统分析。结果表明:气膜的注入能够有效降低喷注器下游燃烧室壁面温度,且使推力室头部区域壁面温度分布更加均匀,同时对喷注器面也会起到一定热防护作用; 气膜流量比对冷却效率和周向均匀性的影响较大,气膜槽缝结构的影响较小,选择合适的气膜流动参数和气膜槽缝结构参数,能达到周向更加均匀分布的气膜冷却效率; 气膜的注入对于燃烧效率具有较大影响,相对而言,气膜槽缝结构因素的影响更大。研究结果可以为气膜冷却设计提供参考。
- Abstract:
- A three-dimensional numerical simulation of the gas-gas combustion chamber with the multi-element injector with gas film cooling was investigated to obtain the optimal parameters that affect the gas film cooling of the near-injection region in the thrust chamber of the hydrogen-oxygen rocket engine. In the numerical model, the standard k-ε model and the eddy-dissipation concept model are used to simulate the turbulence and combustion process respectively. The orthogonal test method is used to analyze the effect of the different film parameters. The analysis results show that the gas film can reduce the wall temperature of combustor in the near-injection region effectively and homogenize the wall temperature distribution, play a role in thermal protection of the injector head in a certain extent, and flow rate ratio of the gas film has greater influence on the cooling efficiency and the uniformity in the circumferential direction in comparison with the structure of the gas film inlet. The more homogeneous cooling distribution of the gas film can be achieved by selecting the appropriate gas film flow parameter and gas film inlet structure. The injection of the film has a great influence on the combustion efficiency, especially for the structural parameters of the film inlet. The results obtained in this study could be used to provide a reference for the design of gas film cooling.
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备注/Memo
收稿日期:2017-05-23
作者简介: 高兴峰(1993—),男,硕士,研究领域为液体火箭发动机热防护
更新日期/Last Update:
1900-01-01