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Effects of total pressure on mode transition in a dual-mode combustor

机译：总压力对双模式燃烧室模式转变的影响

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摘要

The mode transition experiments of the dual-mode combustor were carried out under the conditions that the total pressure was 600 kPa, 700 kPa, 800 kPa and 900 kPa, the total temperature was 810 K, and the Mach number was 2.0. According to the wall pressure of the combustor measured in the experiment, the distribution of other airflow parameters of the combustor were obtained through the one-dimensional performance calculation method. The processes of mode transition of the combustor under different total pressures were studied. The study show that the dimensionless peak pressure of the combustor increased with the increase of the entrance total pressure under the same fuel equivalence ratio; the larger the total pressure, the smaller the fuel equivalence ratio required to reach the same dimensionless peak pressure. The results show that there were pure scramjet mode, dual-mode scramjet mode, dual-mode ramjet mode and the combustion state that the pressure disturbance had spread to the entrance of the isolator with the increase of the fuel equivalence ratio. The dimensionless peak pressures of the combustor when mode transition occurred were 0.25, 0.41, and 0.5, and did not change with the change of the total pressure of the incoming flow.
机译：在总压力为600kPa，700kPa，800kPa和900kPa，总温度为810K，马赫数为2.0的条件下进行双模式燃烧器的模式转变实验。根据实验中测得的燃烧室壁压，通过一维性能计算方法获得了燃烧室其他气流参数的分布。研究了不同总压力下燃烧室的模式转变过程。研究表明，在相同燃料当量比下，燃烧室无因次峰值压力随入口总压力的增加而增大；总压力越大，达到相同的无量纲峰值压力所需的燃料当量比就越小。结果表明，随着燃料当量比的增加，纯超燃冲压发动机模式，双模式超燃冲压发动机模式，双模式冲压冲压发动机模式以及燃烧状态下压力扰动已经扩散到隔离器的入口。发生模式转换时，燃烧室的无量纲峰值压力为0.25、0.41和0.5，并且不随输入流的总压力的变化而变化。

著录项

  • 来源
    《Acta astronautica》 |2019年第2期|55-62|共8页
  • 作者

    Li Jianping; Jiao Guiqian; Luo Jinyuan; Song Wenyan;

  • 作者单位

    Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Shaanxi, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Different total pressures; Dual-mode combustor; Mode transition; Dimensionless peak pressure;

    机译：不同的总压力;双模式燃烧室;模式转换;无因次峰值压力;

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