Re-improved inlet for third-generation light fighter

Abstract

The invention discloses a re-improved inlet for a third-generation light fighter, comprising an inlet side wall, an inlet lower wall and a boundary layer push bump. The front edge of the inlet lower wall is provided with an adjustable lower lip edge; the inlet side wall causes the upper edge firstly to be arranged outwards at the same horizontal position with a wing and then to be changed into an inward-retracting shape; and the bending position of the inlet side wall is provided with an obvious adjacent line. The re-improved inlet for the third-generation light fighter has the advantages that the radar cross section, flight drag, maintenance workload and structural weight of the third-generation light fighter are reduced; and the re-improved inlet allows the light fighter to fly at the speed of 2 Mach.

Description

Technical field: [0001] The invention relates to the field of aircraft structure design, in particular to a third-generation light fighter that can reduce the radar reflection cross-sectional area, flight resistance, maintenance workload and structural weight of the third-generation light fighter, while enabling it to fly at two Mach speeds Improved air intake again. Background technique: [0002] The third-generation light fighters in active service use a rectangular three-wave adjustable air intake, which allows the fighter to have the normal required air intake no matter whether the fighter is flying at subsonic, transonic or supersonic speeds. It can also fly at a speed of two Mach, so that the fighter has a more comprehensive air combat flight performance. However, this kind of air inlet has a complex structure, heavy weight, and greater resistance during flight. In addition, this air inlet makes the radar reflection cross-sectional area of ​​the fighter jet larger, es...

AI Technical Summary

Problems solved by technology

However, because the air intake is fixed, the air intake cannot be adjusted, and the air intake of fighter jets is different at different flight speeds, so that the air intake of fighter jets can just meet the needs during normal flight, but in extreme When flying at low speed and taking off, the air intake is too small, which cannot meet the needs of the engine and affects the thrust of the engine. If the air intake is too large when flying at high speed, the engine will not work properly and even "surge" will appear.

Therefore, the maximum speed of the fighter jet is less than two Mach, which affects the air combat performance of the fighter jet.

In addition, because the air intake follows the shape of the old-fashioned air intake, its side walls are also vertical, so the cross-sectional area of ​​the lateral radar reflection is not reduced at all.

The above two inlets have certain shortcomings, which cannot meet the needs of fighter jets to improve performance

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