| 引用本文: | 刘娟,潘余,刘卫东,等.超燃冲压发动机燃烧室中双凹腔对引导氢分布的影响.[J].国防科技大学学报,2009,31(2):5-9.[点击复制] |
| LIU Juan,PAN Yu,LIU Weidong,et al.The Influence of Dual-cavity on Pilot Hydrogen Distribution in Scramjet Combustor[J].Journal of National University of Defense Technology,2009,31(2):5-9[点击复制] |
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| 超燃冲压发动机燃烧室中双凹腔对引导氢分布的影响 |
| 刘娟, 潘余, 刘卫东, 王振国 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 为了研究超燃冲压发动机燃烧室中多个凹腔对气体燃料分布的影响，运用数值仿真的方法模拟了引导氢(氢气作为引导气体引燃煤油)的分布情况。从三个方面对仿真结果进行分析，首先对比了串联凹腔燃烧室和单凹腔燃烧室中的燃料分布，结果表明后凹腔的存在使得双凹腔燃烧室下游的氢气射流中心更偏向主流；其次比较了前后凹腔同一位置的燃料分布情况，结果表明前凹腔中氢气在展向方向分布更广，后凹腔中氢气在横向方向分布更宽；最后对比了并联凹腔燃烧室和单凹腔燃烧室内的燃料分布情况，结果表明并联凹腔对气体燃料的分布影响不大。 |
| 关键词: 超燃冲压发动机 双凹腔 引导氢 氢气分布 |
| DOI： |
| 投稿日期：2008-11-04 |
| 基金项目:国家部委基金资助项目；国防科技大学研究生创新资助项目 |
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| The Influence of Dual-cavity on Pilot Hydrogen Distribution in Scramjet Combustor |
| LIU Juan, PAN Yu, LIU Weidong, WANG Zhenguo |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In order to investigate the influence of multi-cavity on gas fuel distribution in scramjet combustor, the numerical simulation was used to analyze the pilot hydrogen jet, which was used to pilot kerosene into cold flow in scramjet. The analysis was conducted in three aspects: firstly, dual-cavity combustor with cavities in tandem was compared with single-cavity combustor, with the result showing that the center of hydrogen jet leans to the main stream because of the downstream cavity. Secondly, in dual-cavity combustor with cavities in tandem, upstream cavity was compared with downstream cavity in fuel distribution. The result reveals that hydrogen spreads more extensively in the Z axis direction in upstream cavity, while it spreads wider in Y axis direction in downstream cavity. Finally, the dual-cavity combustor with cavities in parallel was compared with single-cavity combustor. The result indicates that cavity which is in the bottom wall has no influence on gas fuel distribution. |
| Keywords: scramjet dual-cavity pilot hydrogen hydrogen distribution |
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