EXPERIMENTAL STUDIES OF THE SU-27 AIRCRAFT MODEL WITH A SUSPENDED UNIVERSAL AIR CONDITIONING CONTAINER IN AERODYNAMIC PIPE АТ-1
DOI:
https://doi.org/10.54858/dndia.2021-17-21Keywords:
aircraft, suspended universal air reconnaissance container, aerodynamic characteristics, experimental researchesAbstract
The article is dedicated to solving the problem that it is a difficult task for unmanned aerial vehicles to respond quickly and provide high-resolution species information from outside the areas of action of air defense, in relation to highly protected, specific targets deep in enemy territory. Therefore, the aim of the article is to study the total aerodynamic characteristics of the Su-27 aircraft model with a universal suspended air reconnaissance container and to assess its impact on the aerodynamics of the aircraft. To solve this problem, experimental studies of the aerodynamic characteristics of the Su-27 aircraft with a suspended universal air reconnaissance container in the wind tunnel AT-1 of the State Aviation Research Institute were conducted.
The analysis of the obtained experimental results of the influence of the suspended universal air reconnaissance container on the aerodynamic characteristics of the Su-27 aircraft is made and the comparison with the existing regular armament is made. The research results show that equipping the Su-27 aircraft with a universal overhead reconnaissance container has almost no effect on its load-bearing properties, as evidenced by the value of aerodynamic coefficients, which are almost unchanged. With regard to a significant increase in drag, it leads to a decrease in maximum aerodynamic quality. It should be noted that the largest increase in frontal resistance at zero lifting force and a decrease in aerodynamic quality corresponds to the armament of the Su-27 according to the standard version 4xB8-M1 + 2R-73. At the same time, the increase in frontal resistance at zero lifting force and the decrease in aerodynamic quality for the Su-27 aircraft with two universal suspended air reconnaissance containers is 10-17 % less than with the previous version. In order to use the versatility of the suspended container of air reconnaissance, it is planned to conduct similar experimental studies in the wind tunnel AT-1 models of tactical aircraft Su-25 and MiG-29, followed by the results of these studies to determine the impact of the container on the flight characteristics of aircraft. tactical range, range and duration of their flight.
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