Analysis of the influence of aerodynamic heating in ascent stage on infrared radiation characteristics of high-speed aircraft in midcourse

被引：0
|
作者：
Shi W. [1 ]
Sun H. [1 ]
Liu C. [2 ]
Liang S. [1 ]
Shi A. [1 ]
机构：
[1] Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang
[2] Beijing Institute of Electronic System Engineering, Beijing
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2023年 / 52卷 / 12期
关键词：
high-speed aircraft; infrared radiation; midcourse flight; temperature;
D O I：
10.3788/IRLA20230260
中图分类号：
学科分类号：
摘要：
Objective Infrared radiation characteristics is the basis of midcourse infrared warning, detection, identification and track of high-speed aircraft. High-speed aircraft midcourse infrared radiation is closely related to surface temperature, which is related to ascent-stage aero-heating, space thermal radiation, heat-shield structure, and so on. In order to obtain high-speed aircraft’s midcourse infrared radiation in the complex environment background, it is necessary to study the influence of aero-heating, space thermal radiation, surface heat-shield radiating and structure heat conduction on the infrared radiation. Methods Taking into account the influence of ascent-stage aero-heating, space thermal radiation, surface heat-shield radiating and structure heat conduction, making use of aerodynamic heating engineering computation model, space thermal heating computation model, and 1D multi-layer heat conduction computation method, the high-speed aircraft infrared radiation analysis technology is established, and high-speed aircraft midcourse temperature field and infrared radiation analysis is realized under the influence of aero-heating, space radiation heating, radiation heat dissipation, structure heat conduction, and so on. Results and Discussions The computation temperature results match well with flight test results under typical working conditions (Fig.4-5), which verifies the validity of the computation model and methods. The ascent-stage aero-heating has a large effect on the midcourse surface temperature and infrared radiation (Fig.7-10). In the midcourse, the infrared radiation intensity in the wavelength range of 8-12 μm is notably larger than that of 3-5 μm. Therefore, choosing the wavelength range of 8-12 μm is more advantageous for high-speed aircraft midcourse detection (Fig.11). Conclusions In order to simulate the infrared radiation of the high-speed aircraft in midcourse flight, the temperature field and infrared radiation characteristics analysis technology is developed, considering the influence of ascent-stage aero-heating and so on. The technology is validated through comparison with flight test measurements. It is found that: the ascent-stage aero-heating has a large effect on the midcourse infrared radiation. In the midcourse, the infrared radiation intensity in the wavelength range of 8-12 μm is notably larger than that of 3-5 μm. Therefore, choosing the wavelength range of 8-12 μm is more advantageous for high-speed aircraft midcourse detection. © 2023 Chinese Society of Astronautics. All rights reserved.
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