تحلیل مشخصه های‌ اثر بخش در کاهش تشعشعات حرارتی سطح بدنه بالگرد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکده پدافند غیرعامل، دانشگاه جامع امام حسین(ع)، تهران، ایران

2 دانشیار، دانشکده پدافند غیرعامل، دانشگاه جامع امام حسین(ع)، تهران، ایران

3 دکترای تخصصی، دانشکده پدافند غیرعامل، دانشگاه جامع امام حسین(ع)، تهران، ایران

چکیده

کاهش میزان انرژی­های تشعشع یافته از ادوات نظامی نظیر بالگرد، منجر به افزایش امکان مخفی­سازی یا استتار آنها می­گردد. در این پژوهش ابتدا پارامتر­های موثر بر انتقال حرارت تشعشعی شامل معادلات انتقال حرارت، تاثیرات محیط انتشار، شار حرارت رسیده به سطح بدنه بالگرد و هندسه سطح بدنه بالگرد مورد بررسی قرار می­گیرد. سپس شبیه­سازی نرم­افزاری در حضور نور خورشید و در زوایای مختلف و میزان تاثیر آن بر سنجنده­های حرارتی انجام می­شود. نتایج بدست آمده از شبیه­سازی نشان می­دهد که زاویه بالگرد و ضریب جذب به­ترتیب مشخصه­های اثربخش در تشعشع حرارتی هستند. با تغییر زاویه بالگرد، ضریب دید بین سنجنده و بالگرد تغییر کرده و در نتیجه میزان تشعشع فی مابین نیز متغیر شده و این تغییرات هم باز با تغییر در رنگ، جنس، سطح و سایر عوامل موثر بر ضریب جذب، تغییر می­کند.

کلیدواژه‌ها


عنوان مقاله [English]

Analysis of Effective Characteristics in Reducing the Thermal Radiation of the Helicopter Body Surface

نویسندگان [English]

  • Hadi Amirabadi 1
  • S. Khazai 2
  • Mohammad Davoudabadi Farahani 3
1 دانشگاه جامع امام حسین (ع)
2 ihu
3 Imam Hossein University, faculty of passive defense
چکیده [English]

Reducing the amount of radiated energy from military equipment such as helicopters leads to an increase in the     possibility of hiding or camouflage them. In this study, the parameters affecting radiation heat transfer, including heat transfer equations, the effects of diffusion environment, the heat flux reaching the surface of the helicopter body, and the geometry of the helicopter body surface are investigated. Then, software simulation is performed in the presence of sunlight and at different angles and its effect on thermal sensors. The results obtained from the simulation show that the angle of the helicopter and the absorption coefficient are the effective characteristics in thermal radiation. By changing the angle of the helicopter, the visibility coefficient between the sensor and the helicopter changes, and as a result, the amount of radiation in between also changes, and these changes also change with the change in color,   material, surface and other factors affecting the absorption coefficient.
 

کلیدواژه‌ها [English]

  • Helicopter
  • Thermal Infrared
  • Camouflage
  • Effective Characteristics

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