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A rear body rectification structure of a twin-engine aircraft

A technology for aircraft and engine hoods, which is applied in the field of rear body rectification structure of twin-engine aircraft, and can solve problems such as aircraft vibration and airflow separation

Active Publication Date: 2016-06-15
江西洪都航空工业股份有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In addition, the poor shape of the rear body rectification will also cause airflow separation, which will cause problems such as aircraft vibration

Method used

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  • A rear body rectification structure of a twin-engine aircraft

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Embodiment Construction

[0013] Embodiments of the present invention are as follows: figure 1 Shown, a kind of rear body rectification structure of twin-engine aircraft comprises: rectification rear end surface 1, rectification lower surface 2 and rectification upper surface 4, and forms the rectification structure of shape closure with rear body engine cover 3; Rectification lower surface 2 and rectification The upper surface 4 is located in the middle of the two engine covers 3 of the rear body of the aircraft, the rectifying rear end surface 1 is connected up and down with the rectifying upper surface 4 and the rectifying lower surface 2, and the two engine covers 3 are connected left and right.

[0014] The rectifying upper surface 4 transitions smoothly along the airflow direction along the upper profile of the rear body, ensuring that the contraction angle of the upper surface is less than 9°; the rectifying lower surface 2 transitions smoothly along the airflow direction along the lower profile ...

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Abstract

The invention relates to the technical field of pneumatic layout design for air vehicles, in particular to an afterbody rectification structure of a twin-engine aircraft. The rectification structure comprises a rectified rear end face (1), a rectified lower surface (2) and a rectified upper surface (4), wherein the rectified rear end face (1), the rectified low surface (2), the rectified upper surface (4) and an afterbody engine cover (3) constitute an appearance-enclosed rectification structure together. The rectification structure with the appearance can ensure a smaller angle of throat formed by rectification appearance between twin engine hoods of the aircraft, and avoid the flow separation between the upper surface and the low surface of the aircraft. In addition, the height and the space of the rectification structure are larger, which is beneficial for reduction in the structure weight and increasing in the structure strength.

Description

technical field [0001] The invention relates to the technical field of aerodynamic layout design of a traveler, in particular to a rear body rectification structure of a twin-engine aircraft. Background technique [0002] For general military aircraft, the engine is installed inside the fuselage, and the rear section of the aircraft fuselage (hereinafter referred to as the rear body) is concentrated on the vertical tail, horizontal tail and engine nozzle. The resistance generated by the area is much higher than that of other parts of the aircraft. Usually, the rear body resistance accounts for nearly half of the zero resistance of the aircraft. In addition, the poor shape of the rear body rectification will also cause airflow separation, which will cause problems such as aircraft vibration. Therefore, aircraft designers need to design a matching rear body rectification shape based on the number of engines, nozzle spacing, engine characteristics, loading requirements, and em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C7/00
Inventor 罗松张剑龙李泰安马经忠梁斌
Owner 江西洪都航空工业股份有限公司
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