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

Document Type : Original Article

Authors

1 دانشگاه جامع امام حسین (ع)

2 ihu

3 Imam Hossein University, faculty of passive defense

Abstract

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.
 

Keywords

Smiley face

References

[1] S. Khazaei, “Remote sensing with an attitude on identification and care,” Tehran, Printing and Publishing Institute of Imam Hossein University (AS), 2008 (In Persian)
[2] A. Talebi, J. Khalilzadeh, Passive defense measures to reduce the infrared effects of military ships. Summer, Passive Defense Quarterly, 2009, 11-17 (In Persian).
[3] F. Jobin, P. Paradis, Recent developments in lanthanide-doped mid-infrared fluoride fiber lasers, Optica, 2022, vol. 30, pp.8615-8640, https://doi.org/10.1364/ OE.450929
[4] S.P. Mahulikar, H.R. Sonawane, G.A. Rao, Infrared signature studies of aerospace vehicles, Progress in Aerospace Sciences, 2007, vol. 43, pp.218-245,  https://doi.org/10.1016/j.paerosci.2007.06.002
[5] L. Jianwei, W. Qiang, Aircraft-skin Infrared Radiation Characteristics Modeling and Analysis, Chinese Journal of Aeronautics, 2009, vol. 22, pp. 493-497. https://doi.org/10.1016/S1000-9361(08)60131-4
[6] A. Talebi, Reducing the infrared effect of the aircraft plume using geometrical changes in the exhaust outlet nozzle", non-active defense scientific-promotional quarterly, 2013, No. 4(12), 37-43 (In Persian).
 
[7] P. Chengxiong, Z. Jingzhou, S. Yong, Modeling and Analysis of Helicopter Thermal and Infrared Radiation,
Chinese Journal of Aeronautics, 2011, vol. 24, 558-567. https://doi.org/10.1016/S1000-9361(11)60065-4
[8] M. Salari, R. Ebrahimi Laleh, Presentation of a computational model for the evaluation of thermal infrared radiation from the hull of ships, the first national conference of technological sciences and naval battle management systems, Ferdowsi University of Mashhad, 2013 (In Persian)
[9] R. Ebrahimi Laleh, Conceptual design of intelligent software to determine the thermal infrared effect of the hull surface of ship, 2012 (In Persian)
[10] R. Ebrahimi Laleh, N. Ghasemloo, Calculate Thermal Infrared Intensity of the Hull’s Military Ship, Journal of Geographic Information System, 2014, vol. 6.  https://doi.org/10.4236/jgis.2014.64029
[11] F.P. Lang, H. Wang, Review on variable emissivity materials and devices based on smart chromism, International Journal of Thermophysics, 2018, vol. 39. https://doi.org/10.1007/s10765-017-2329-0
[12] M. Salari, S. Khazaei, R. Ebrahimi Laleh,  Presentation of a calculation process and analysis on the parameters affecting the thermal infrared radiation of ships' hulls, Marine Science and Technology, 2012, No. 60. (In Persian)
[13] R. Laleh, Ramin, M. Salari, Effective parameters in the design of a software for simulating the thermal infrared radiation of a floating body", Journal of High-Speed Vessel Engineering, 2013, 41. (In Persian)
[14] A. Talebi, J. Khalilzadeh, Non-Available Defense Measures in Reducing the Infrared Effects of Military Ships, Non-Available Defense Quarterly, 2009, Vol. 2, No. 2 (In Persian)
[15] B. Pousti, Heat transfer. fourth edition. Tehran, publishing academic books, 2007, 400-426. (In Persian)
[16] S.H. Yasuh, A. Jabari, Engineering heat transfer. Mashhad, Ferdowsi University of Mashhad, Institute of Printing and Publishing, 2006, Vol. 2, 433-485 (In Persian)
[17] I. Khushrovan, Heat transfer. Tehran University Publishing Center, 2018, Vol. 2, pp. 297-405 (In Persian)
[18] S.R. Rafiei Tabatabai, Geothermal solar energy and other clean energy sources. Tehran, Azadeh Publications, 2009, 162-184 (In Persian)
 

Files

History

  • Receive Date: 07 April 2024
  • Revise Date: 05 May 2024
  • Accept Date: 03 September 2024
  • Publish Date: 26 October 2024

Share

How to cite

Statistics