煤油总包反应机理对超声速燃烧的影响

推进技术 ›› 2013, Vol. 34 ›› Issue (7): 938-943.

煤油总包反应机理对超声速燃烧的影响

侯凌云¹,牛东圣¹,潘鹏飞¹,马雪松²,冮强²

清华大学航天航空学院,北京 100084;清华大学航天航空学院,北京 100084;清华大学航天航空学院,北京 100084;中国航天科工集团三十一研究所高超声速冲压发动机技术重点实验室,北京100074;中国航天科工集团三十一研究所高超声速冲压发动机技术重点实验室,北京100074

发布日期:2021-08-15
作者简介:侯凌云(1972—),女,博导,副教授,研究领域为超音速燃烧和先进推进理论。 E-mail:lyhou@tsinghua.edu.cn
基金资助:
国家教育部留学回国人员科研启动金。

Effects of Kerosene Global Reaction Mechanisms on Supersonic Combustion

School of Aerospace, Tsinghua University, Beijing 100084, China;School of Aerospace, Tsinghua University, Beijing 100084, China;School of Aerospace, Tsinghua University, Beijing 100084, China;Science and Technology on Scramjet Laboratory,The 31st Research Institute of CASIC,Beijing 100074, China;Science and Technology on Scramjet Laboratory,The 31st Research Institute of CASIC,Beijing 100074, China

Published:2021-08-15

摘要/Abstract

摘要： 为考察不同总包反应机理对超声速燃烧数值模拟的影响,以煤油燃料超燃冲压发动机支板加凹腔燃烧室为研究对象,分别采用单步和两步总包反应机理对其燃烧过程进行了三维数值模拟研究。对比分析表明,采用的单步反应机理计算结果与实验值呈现明显差异；而两步反应机理的壁面静压计算结果与实验数据吻合良好,验证了计算过程的有效性。该单步反应机理在前支板处局部反应释热量过大过快,致使超燃室内出现热壅塞现象；而两步反应机理的反应和释热规律更为合理,更逼近真实燃烧过程。 

关键词: 超声速燃烧;数值模拟;煤油;化学反应机理;热壅塞 

Abstract: To investigate the effects of different global chemistry kinetics on supersonic combustion simulation, a three-dimensional numerical simulation of a kerosene-fueled strut-cavity-based supersonic combustor was performed using two different global reaction mechanisms, namely the one-step and the two-step mechanisms. Comparisons between the predicted static pressure distribution along the combustor walls and experimental data show that there is obvious discrepancy found in the one-step case. On the other hand, good agreement between computation and experiments was obtained by the two-step mechanism, validating its effectiveness and availability. In the one-step calculation, over-predicted heat release near the front struts leads to thermal choking, thus the combustor can no longer work properly. The rules of chemical reaction and heat release generated by the two-step mechanism are more reasonable and closer to the authentic combustion process. 

Key words: Supersonic combustion; Numerical simulation; Kerosene; Chemical kinetic mechanism; Thermal choking

侯凌云,牛东圣,潘鹏飞,马雪松,冮强. 煤油总包反应机理对超声速燃烧的影响[J]. 推进技术, 2013, 34(7): 938-943.

HOU Ling-yun¹, NIU Dong-sheng¹, PAN Peng-fei¹, MA Xue-song²,GANG Qiang². Effects of Kerosene Global Reaction Mechanisms on Supersonic Combustion[J]. Journal of Propulsion Technology, 2013, 34(7): 938-943.

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