Generalized mute cone aerodynamic layout configuration for supersonic civil aircraft

Abstract

The invention provides a generalized silence cone aerodynamic layout configuration for a supersonic civil aircraft. A generalized silence cone comprises a generalized silence cone front section and a generalized silence cone rear section. The upper surface of the generalized mute cone front section and the upper surface of the generalized mute cone rear section, the upper surface of the rear section and the upper surface of the fuselage, and the lower surface of the rear section and the lower surface of the fuselage are in smooth transition connection at the connection position, and the lower surface of the generalized mute cone front section and the lower surface of the rear section are bent at the connection position. The generalized mute cone has the advantages that shock waves and expansion waves are generated on the lower surfaces of the front section and the rear section of the generalized mute cone respectively, the shock waves and the expansion waves cannot be combined with wave systems behind the shock waves and the expansion waves in the process of spreading to the ground, and the acoustic explosion intensity can be effectively reduced; (2) compared with a traditional mute cone, shock wave resistance can be reduced, and aerodynamic characteristics can be improved; and (3) compared with a traditional mute cone, a retracting and releasing mechanism is not needed, and the structural weight can be reduced. Therefore, the generalized mute cone designed by the invention can better meet the requirements of low sound explosion and low resistance of the supersonic civil aircraft.

Description

technical field [0001] The invention belongs to the technical field of sonic explosion suppression for supersonic aircraft, and in particular relates to a generalized silent cone aerodynamic layout configuration for supersonic civil aircraft. Background technique [0002] The sonic boom is the bottleneck that restricts the commercial operation of supersonic civil aircraft. In order to reduce the intensity of ground sonic boom to an acceptable level and put supersonic civil aircraft into commercial operation, researchers at home and abroad have carried out a lot of research since the 1960s. Among them, at the beginning of this century, Howe, the American Gulfstream company, proposed the noise cone technology (patent No. US6698684), which is an effective sonic boom suppression technology. Nose silent cone technology is a device combined by adding multiple slender rods to the head of a supersonic aircraft, which can achieve sonic boom suppression. The mechanism of suppressing ...

AI Technical Summary

Problems solved by technology

[0003]However, although the traditional silent cone can effectively reduce the ground sonic explosion intensity, the shock wave intensity generated on its upper surface is relatively strong, which increases the resistance to a certain extent and affects the Aerodynamic performance of supersonic civil aircraft

In addition, for large supersonic civil aircraft, the length of the traditional silent cone is relatively long, and it needs to be retracted between the subsonic and supersonic flight states, which has an adverse effect on the structure

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