航空学报 > 2013, Vol. 34 Issue (10): 2300-2307   doi: 10.7527/S1000-6893.2013.0217

超燃冲压发动机喷管红外辐射特性数值模拟

柴栋, 方洋旺, 童中翔, 李建勋   

  1. 空军工程大学 航空航天工程学院, 陕西 西安 710038
  • 收稿日期:2012-12-11 修回日期:2013-04-15 出版日期:2013-10-25 发布日期:2013-04-24
  • 通讯作者: 方洋旺,Tel.: 029-84787589 E-mail: ywfang2008@sohu.com E-mail:ywfang2008@sohu.com
  • 作者简介:柴栋 男, 博士研究生。主要研究方向: 高超声速气动力与热辐射。 Tel: 029-84787589 E-mail: chaibaodong@126.com;方洋旺 男, 博士, 教授, 博士生导师。主要研究方向: 导弹制导与控制、 作战使用及目标特性分析。 Tel: 029-84787589 E-mail: ywfang2008@sohu.com;童中翔 男, 博士, 教授, 博士生导师。主要研究方向: 飞行仿真与红外对抗技术。 Tel: 029-84787505 E-mail: tzxkgy@163.com
  • 基金资助:

    国家自然科学基金(61172083)

Numerical Simulation on Infrared Radiation Characteristics of Scramjet Nozzles

CHAI Dong, FANG Yangwang, TONG Zhongxiang, LI Jianxun   

  1. School of Aeronautical and Astronautical Engineering, Air Force Engineering University, Xi'an 710038, China
  • Received:2012-12-11 Revised:2013-04-15 Online:2013-10-25 Published:2013-04-24
  • Supported by:

    National Natural Science Foundation of China (61172083)

摘要:

为掌握不同构型的超燃冲压发动机喷管在不同方位的红外辐射强度分布,采用反向蒙特卡罗(RMC)法,研究了平面膨胀面、曲面膨胀面和有侧板曲面膨胀面3种喷管构型在3~5 μm波段的红外辐射特性,分析了不同喷管的红外辐射在方位上的分布规律。结果表明:3种喷管的红外辐射在铅垂面上呈现明显的非对称性,在-70°~-40°探测范围内红外辐射特征最强;曲面喷管产生的喷流局部高温区位置靠下,在下方探测的红外辐射强度高于平面喷管;侧板对喷管壁面以及尾焰高温核心区有遮挡作用,可以有效抑制喷管在水平方向的红外辐射。

关键词: 超燃冲压发动机, 喷管, 红外辐射, 计算流体力学, 反向蒙特卡罗法

Abstract:

For mastery of the infrared radiation intensity distribution in different directions of the scramjet nozzles with different structures, based on the reverse Monte Carlo (RMC) method, the influence of different structures of the scramjet nozzles on the infrared radiation characteristics in 3-5 μm wave band is researched, including a planar expansion ramp, a curved expansion ramp and a curved expansion ramp with a lateral plate, and the distribution regularities of the nozzles’ infrared radiation in different directions are analyzed. The results show that the infrared radiation of the nozzles display an obvious asymmetry in the vertical plane with the strongest infrared radiation areas in the detection range from -70° to -40°. The high-temperature region of the exhaust plume produced by the curved nozzle is in the lower position, so that its infrared radiation intensity detected from below is higher than that from the planar nozzle. The lateral plate suppresses the infrared radiation in the horizontal direction effectively through sheltering it from the nozzle walls and the high temperature core of the exhaust plume.

Key words: scramjet, nozzle, infrared radiation, computational fluid dynamics, reverse Monte Carlo method

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