Integrated Design Method of Single Windshield Head

Abstract

The invention belongs to the field of aircraft design, and particularly relates to an integrated design method for a single curved windshield nose, comprising the following steps: extracting Catia forming parameters according to the design constraints of the nose; establishing a parameterized surface model of the nose, and generating the curved surface in the following order: Generate the upper main surface on one side of the nose; cut off the windshield area of ​​the upper main surface; first generate the main windshield surface in the windshield area and then generate the side windshield surface; generate the transitional surface between the main windshield surface and the remaining upper main surface after cutting the windshield area ;Generate the upper front surface on one side of the nose; generate the remaining surfaces on one side of the nose in sequence: lower main surface, lower rear surface, lower front surface; symmetrically generate the surface on the other side of the nose. The upper main curved surface is integrally generated by the cutting method, which ensures the high-order continuity of the curvature of the upper main curved surface, which is convenient for integrated manufacturing; at the same time, the machine head has good aerodynamic characteristics and flow quality, thereby reducing fuel consumption.

Description

technical field [0001] The invention relates to a method for designing an aircraft nose, in particular to an integrated design method for a single curved windshield nose, through which a streamlined nose with good aerodynamic characteristics can be designed. Background technique [0002] For the design of the nose of a civil aircraft, many inherent constraints need to be met, such as the external view of the cockpit, the driver's activity space and other ergonomic requirements; Frame, floor, wall panel, interior decoration and other structural parts layout space requirements, etc. Under the premise of satisfying the above constraints, the nose design should pursue the optimal aerodynamic characteristics. [0003] For the nose of an aircraft, the main curve on the windshield of the cockpit has a crucial influence on the flow quality of the entire nose. This place is above the driver's head. The installation of the top plate in the cockpit and the structural height constrain...

AI Technical Summary

Problems solved by technology

Its advantage is that the influence of refraction and visual deformation is minimal, and the cost of the plane windshield is low. The disadvantage is that the flow characteristics at the windshield are poor, and because the main curved surface b on the nose is protruding, the curvature is large, and the transition surface between the plane (windshield) and the curved surface The quality is poor, so that the airflow passing through here accelerates faster, and it is easy to produce a supersonic zone, and there will be two stagnation points at the nose c of the nose, and the aerodynamic resistance is large

In addition, due to the discontinuity of the curved surface of the machine head, it is difficult to transition the curved surface, and the manufacturing process is also relatively complicated.

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