| 脉冲等离子体对超燃凹腔燃料喷流的影响 |
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| 引用本文： | 郑直,聂万胜,张政,李金龙,周思引. 脉冲等离子体对超燃凹腔燃料喷流的影响[J]. 红外与激光工程, 2017, 46(2): 239005-0239005(6). DOI: 10.3788/IRLA201746.0239005 |
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| 作者姓名： | 郑直 聂万胜 张政 李金龙 周思引 |
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| 作者单位： | 1.装备学院 研究生院,北京 101416; |
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| 基金项目： | 国家自然科学基金（11205244;91441123） |
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| 摘 要： | 为了研究在脉冲控制方式下，准直流横向放电等离子体对超燃冲压发动机燃烧室燃料喷流流场的影响，构建了脉冲控制下准直流横向放电等离子体模型，分析了不同脉冲控制频率下等离子体对凹腔喷流流场特征结构、燃烧室总压损失、喷流下游掺混效率的影响。结果表明:脉冲控制模式下，等离子体能够有效控制喷流上游分离激波位置与强度、幅度，导致凹腔流场参数周期性波动，使得燃料与主流的掺混效率提高，与定常控制方式相比脉冲控制方式能够减小压力损失。
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| 关 键 词： | 等离子体 激励频率 脉冲控制 燃料喷流 |
| 收稿时间： | 2016-06-10 |
Effect of pulsed plasma on fuel jet in scramjet cavity |
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| Affiliation: | 1.Department of Postgraduate,The Academy of Equipment,Beijing 101416,China;2.Department of Space Equipment,The Academy of Equipment,Beijing 101416,China |
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| Abstract: | To research the influence of quasi-DC transversal electrical discharge plasma on the fuel jet flowfield in the combustor of scramjet under the pulse control, the pulse quasi-DC transversal electrical discharge plasma model was established. Under different pulse excitation frequency, taking advantages of numerical simulation, the influence of plasma on the formation feature of cavity fuel jet flowfield, loss of combustor total pressure, the mixing efficiency of the jet downstream was analyzed. The results show that, under pulse plasma condition,the position and intensity of the upstream separation shock can be controlled effectively, the periodic fluctuation of the cavity flowfield due to the pulse control, which improved the mixing efficiency of the fuel and mainstream, can decrease the total combustor pressure losses contrast to steady control. |
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