• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2026, Vol. 62 ›› Issue (14): 241-257.doi: 10.3901/JME.260545

• 可再生能源与工程热物理 • 上一篇    下一篇

扫码分享

以CO2为工质的主动流动控制的降温减阻特性

潘利生1,2, 姚子康1,2, 穆白3, 魏小林1,2   

  1. 1. 中国科学院力学研究所空天飞行高温气动全国重点实验室 北京 100190;
    2. 中国科学院大学工程科学学院 北京 100049;
    3. 北京建筑大学环境与能源工程学院 北京 100044
  • 收稿日期:2025-07-10 修回日期:2026-01-02 发布日期:2026-08-29
  • 作者简介:潘利生(通信作者),男,1982年出生,博士,研究员,硕士研究生导师。主要研究方向为飞行器热管理关键技术。E-mail:panlisheng@imech.ac.cn
  • 基金资助:
    国家自然科学基金资助项目(12372237)。

Heat Reduction and Drag Reduction Characteristics of Active Flow Control Using CO2 as a Working Medium

PAN Lisheng1,2, YAO Zikang1,2, MU Bai3, WEI Xiaolin1,2   

  1. 1. State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190;
    2. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049;
    3. School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044
  • Received:2025-07-10 Revised:2026-01-02 Published:2026-08-29

摘要: 飞行器在大气层内高速飞行时,巨大的气动热流和气动阻力对飞行器结构材料和推力构成严峻挑战,以CO2为工质的主动流动控制技术在降温减阻方面具有较大潜力。通过数值模拟方法,对飞行器头锥处CO2逆向射流的降温减阻特性开展了研究。在不同射流参数下,CO2射流前端可能出现凝华现象。当未出现凝华时,CO2降温减阻能力和常规工质区别较小;当出现凝华时,降温性能大幅提升,但减阻能力有所减弱。随射流CO2总温升高,凝华区固态CO2占比减小,同时脱体激波距离增大。受凝华现象影响,减阻效果随CO2射流总温的降低明显减弱;随射流总压增大,流场出现长射流与短射流的转变,钝体前压强呈现先减小后升高再减小的趋势,壁面St(斯坦顿数)则单调下降,降温效果不断提升;随着射流角度增大,射流的降温减阻效果不断减弱,当射流角度大于60°时,射流丧失了降温效果;随来流攻角增大,钝体迎风区和背风区的热环境和阻力环境不对称性增加,射流对迎风区的降温减阻效果减弱。

关键词: 主动流动控制, CO2逆向射流, 降温减阻, 射流凝华, 飞行器热管理

Abstract: When flying at high speeds in the atmosphere,the tremendous aerodynamic heat flux and resistance pose significant challenges to both the structural materials and thrust of an aircraft. Active flow control technology,which employs CO2 as the working fluid,holds great potential for cooling and drag reduction. The present study investigates the cooling and drag reduction characteristics of a CO2 reverse jet at the nose cone of an aircraft using numerical simulations. Under different jet parameters,condensation may occur at the front end of the CO2jet. When condensation does not occur,the cooling and drag reduction abilities of CO2 are comparable to those of commonly fluids. However,when condensation takes place,the cooling effectiveness improves significantly while the drag reduction ability weakens. As the total temperature of CO2 in the jet increases,the proportion of solid CO2 in the condensation zone decreases,and the detachment shock distance increases. Due to the impact of the condensation phenomenon,the drag reduction effect significantly decreases with decreasing total temperature of the CO2 jet. As the total pressure of the jet increases from low to high,the flow field undergoes a transition between long and short jets. The pressure in front of the blunt body initially decreases,then increases,and finally decreases again. The wall stanton number monotonically decreases,leading to an improved cooling effect. In contrast,increasing jet angle results in a weakened cooling and drag reduction effect. When the jet angle exceeds 60°,the cooling effect is lost entirely. Additionally,as the angle of attack of the incoming flow increases,the difference in thermal and resistance environments between the upwind and leeward regions of the blunt body becomes increasingly asymmetric,and the cooling and drag reduction effect of the jet on the upwind region is weakened.

Key words: active flow control, CO2 opposing jet, cooling and drag reduction, jet condensation, aircraft thermal management

中图分类号: