航空学报 > 2022, Vol. 43 Issue (12): 126056-126056   doi: 10.7527/S1000-6893.2021.26056

环形及其组合体喷流的减阻防热机理

张道毅, 周超英   

  1. 哈尔滨工业大学(深圳)机电工程与自动化学院, 深圳 518000
  • 收稿日期:2021-07-05 修回日期:2021-07-20 发布日期:2021-08-17
  • 通讯作者: 周超英,E-mail:cyzhou@hit.edu.cn E-mail:cyzhou@hit.edu.cn
  • 基金资助:
    深圳市科技计划基础研究项目(JCYJ20170307151117299)

Drag reduction and heat protection mechanism of annular jet and combined jet

ZHANG Daoyi, ZHOU Chaoying   

  1. School of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen 518000, China
  • Received:2021-07-05 Revised:2021-07-20 Published:2021-08-17
  • Supported by:
    Basic Research Project of Shenzhen Science and Technology Program (JCYJ20170307151117299)

摘要: 为了分析环形组合体喷流对飞行器表面减阻降热的影响,以半球头体环形逆向喷流为研究对象,在控制喷流质量流不变以及非设计工况的情况下,研究了环形喷流以及不同组合形式环形喷流的喷口尺寸对高超声速逆向喷流流场模态变化以及飞行器表面热流的影响。研究发现随着环形喷流喷口尺寸的增大,长短模态转换的临界喷压比值会随之减小;在组合喷流中,环形喷口尺寸越大,中心喷口尺寸越小,长短模态转换的临界喷压比越大。环形喷流和组合形式的环形喷流相对于传统的中心喷流有更好的降热效果,且其喷口尺寸对最大热流峰值位置也有一定的影响。

关键词: 高超声速, 环形喷流, 组合喷流, 长短穿透模态, 降热

Abstract: In order to analyze the influence of annular composite jet on drag and heat reduction of aircraft surface, this paper studies the influence of different sizes of annular jet and combined jet on the hypersonic reverse jet under the off-design condition by taking the annular reverse jet of the hemispherical head body as the research object. The result shows that as the size of the annular jet nozzle increases, the critical spray pressure ratio of the long-short modal conversion will decrease; in the combined jet, the larger the annular nozzle size, the smaller the center nozzle size and the greater the critical spray pressure ratio of the long-short modal transition. It is concluded that annular jets have a better heat reduction effect than traditional central jets, and the size of combined jet has a certain influence on the maximum heat flow peak position.

Key words: hypersonic, annular jet flow, combined jet flow, long and short penetration modes, heat reduction

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