Heat Transfer Characteristics of the Missile Radome Considering Flight Scenario

Sangbin Han; Dongkyun Lee; Kyeongho Lee; Sunghwan Yim; Hyung Hee Cho

doi:10.7734/COSEIK.2024.37.6.401

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2024 Vol.37, Issue 6 Preview Page Next Page

Research Paper

Heat Transfer Characteristics of the Missile Radome Considering Flight Scenario 비행 시나리오에 의한 미사일 레이돔의 열전달 특성

31 December 2024. pp. 401-408

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Abstract

The radome of a supersonic or hypersonic missile endures excessive heat flux due to aerodynamic heating. As the speed and altitude of a missile vary after launch, the heat flux on the radome changes accordingly. If the temperature of the radome surpasses the operational limit of the material owing to these thermal loads, it loses its protective function for the radar. Thus, the heat transfer characteristics of the radome under different flight conditions must be considered in radome design. In this study, the quasi-transient method was applied to analyze the heat transfer characteristics of the radome in a hypothetical flight scenario, aiming to evaluate the accuracy and efficiency of the quasi-transient method. Using this approach, the time-dependent heat flux and temperature distribution on the external wall of the radome were determined. After 15 s, certain parts of the external wall of the radome exceeded the operational temperature of the material. Furthermore, by comparing quasi-transient and fully transient analysis results, it was confirmed that the average radome temperature could be estimated within 15% accuracy, and analysis time was reduced by 75%, highlighting the effectiveness of the quasi-transient method.

Keywords

aerodynamic heating

quasi-transient method

radome

flight scenario

초음속 혹은 극초음속 미사일의 레이돔은 공력 가열로 인해 과도한 열유속에 노출된다. 또한 미사일은 발사 후 속도와 고도가 변화하면서 이에 따라 레이돔에 가해지는 열유속이 변화한다. 이러한 열부하에 의해 레이돔의 온도가 소재의 허용 온도를 초과하면, 레이돔은 레이더를 보호하는 기능을 상실하게 된다. 따라서 비행 시나리오에 따른 레이돔의 열전달 특성을 고려하여 레이돔을 설계해야 한다. 본 연구에서는 준-비정상 기법을 적용하여 가상의 비행 시나리오에서의 레이돔의 열전달 특성을 분석하고 준-비정상 기법의 정확도와 효율성을 평가하였다. 준-비정상 기법을 적용하여 시간에 따른 레이돔 외벽의 열유속과 온도 분포를 도출하였으며, 15초 이후 레이돔 외벽의 온도가 소재의 허용 온도 이상으로 가열되는 부분이 있는 것을 확인하였다. 또한 준-비정상 기법을 통해 도출된 결과와 비정상 해석 결과를 비교하여 레이돔 평균 온도 측면에서 15% 이내의 오차로 예측할 수 있고 해석 소요 시간은 75%가 단축되는 것을 확인하여 준-비정상 기법의 효율성을 입증하였다.

키워드

공력 가열

준-비정상 기법

레이돔

비행 시나리오

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 37
No :6
Pages :401-408
Received Date : 2024-09-05
Revised Date : 2024-09-14
Accepted Date : 2024-09-19
DOI :https://doi.org/10.7734/COSEIK.2024.37.6.401

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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