2025, 06 June |
DOI: 10.14489/td.2025.06.pp.012-018
Agaev F. G., Asadov H. H., Alieva G. V. Abstract. The article is devoted to the topical issue of observing aircraft in the infrared range using the thermal radiation of an aircraft heated due to aerodynamic effects that occur during flight through the air. The purpose of this article is to optimize the infrared control of an aircraft in flight, maneuvering at altitude to overcome obstacles along its course, by searching for an optimization function according to the proposed optimization criterion, taking into account the influence of ambient temperature on the thermal radiation of aircraft. At the same time, the situation is analyzed when it is necessary to achieve the concealment of one's own aircraft from the enemy's surveillance equipment after completing the flight by minimizing thermal radiation from the aircraft. The objective of the study of this article is to determine the conditions for achieving the minimum average temperature of the aircraft skin due to piloting modes during aircraft descent operations, i.e. during maneuvering carried out by pilots in order to avoid unexpected obstacles along the course. The article considers a situation when an aircraft, in order to overcome sudden obstacles along the course, performs a maneuver to reduce flight altitude. This increases the infrared signature of the aircraft. It is shown that when performing such a maneuver, there is some optimal relationship between the values of the Mach number, which is the quantitative equivalent of flight speed, and the ambient air temperature, at which it is possible to minimize the flow of infrared radiation emitted by the aircraft at low altitude. An expression is obtained that makes it possible to calculate the wavelength in the infrared range in which an aircraft emitting a minimum of thermal energy can be controlled in the best possible way. The article has a practical application and can be used in the preparation of training methods for pilots. Keywords: optical range, infrared radiation, Mach number, optimization, aerodynamic heating.
F. G. Agaev, H. H. Asadov (National Aerospace Agency Azerbaijan, Baku, Republic of Azerbaijan) E-mail:
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1. Rohacs J., Jankovics I., Gal I. et al. (2018). Small Aircraft Infrared Radiation Measurements Supporting the Engine Airframe AeroThermal Integration. Periodica Polytechnica Transportation Engineering, 47, 51 ‒ 63.
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