航空学报 > 2025, Vol. 46 Issue (18): 131788-131788   doi: 10.7527/S1000-6893.2025.31788

双燃烧室冲压发动机对硼基推进剂的促燃效果

吴宪举1,2, 魏志军1(), 王云辉1, 周凌1, 冯滢1   

  1. 1.北京理工大学 宇航学院,北京 100081
    2.台州学院 航空工程学院,台州 318000
  • 收稿日期:2025-01-09 修回日期:2025-02-18 接受日期:2025-05-06 出版日期:2025-09-25 发布日期:2025-05-08
  • 通讯作者: 魏志军 E-mail:wzj@bit.edu.cn
  • 基金资助:
    国家自然科学基金(U21B2086)

Combustion enhancement effect of dual combustor ramjet engines on boron-based propellants

Xianju WU1,2, Zhijun WEI1(), Yunhui WANG1, Ling ZHOU1, Ying FENG1   

  1. 1.School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China
    2.School of Aeronautical Engineering,Taizhou University,Taizhou 318000,China
  • Received:2025-01-09 Revised:2025-02-18 Accepted:2025-05-06 Online:2025-09-25 Published:2025-05-08
  • Contact: Zhijun WEI E-mail:wzj@bit.edu.cn
  • Supported by:
    National Natural Science Foundation of China(U21B2086)

摘要:

为研究双燃烧室冲压发动机(DCR)构型对硼基推进剂的促燃效果及其对发动机性能的增益,选取超燃冲压发动机(SCR)作为对比。结果表明,相较于SCR,得益于亚燃室的高温高压环境,DCR在马赫数5@高28 km(工况1)和马赫数6@高30 km(工况2)下均能有效促进硼基推进剂的燃烧;且总压损失较小,发动机性能较好。在工况1,DCR在1.5、2、2.5 m发动机长度下的燃烧效率较SCR分别高26.6%、27.2%和23.8%,比冲分别高1 964、1 970、1 406 m/s;在工况2,DCR对应燃烧效率较SCR分别高27.9%、22.3%和22.9%,比冲分别高1 615、1 393、960 m/s。发动机长度越短,DCR相较于SCR的性能优势越显著,表明在空间受限的应用场景中优先选用DCR构型。

关键词: 双燃烧室冲压发动机, 超燃冲压发动机, 硼基推进剂, 燃烧效率, 比冲

Abstract:

To investigate the combustion enhancement effect of the Dual Combustor Ramjet engine (DCR) configuration on boron-based propellants and its contribution to engine performance, the scramjet engine (SCR) was selected for comparison. The results indicate that, compared to SCR, the DCR effectively promotes the combustion of boron-based propellants under the conditions of Ma=5 at 28 km height (Case 1) and Ma=6 at 30 km height (Case 2), benefiting from the high-temperature and high-pressure environment of the subsonic combustor, while maintaining relatively low total pressure loss and better engine performance. In Case 1, the combustion efficiency of DCR is higher than that of SCR by 26.6%, 27.2%, and 23.8% for engine lengths of 1.5 m, 2 m, and 2.5 m, respectively, with specific impulses of 1 964 m/s, 1 970 m/s, and 1 406 m/s. In Case 2, DCR shows combustion efficiencies higher than SCR by 27.9%, 22.3 %, and 22.9 %, with specific impulses of 1 615 m/s, 1 393 m/s, and 960 m/s, respectively. The shorter the engine length, the more pronounced the performance advantage of DCR over SCR, indicating that DCR is preferable in space-constrained application scenarios.

Key words: dual combustor ramjet, scramjet, boron-based propellant, combustion efficiency, specific impulse

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