Solving method of takeoff performance of ground effect vehicle

Abstract

The invention discloses a solving method of the takeoff performance of a ground effect vehicle. The takeoff performance comprises takeoff water-leaving speed, water-leaving time and water skiing distance. The method comprises the steps of carefully analyzing a relationship between hydrodynamic resistance/thrust/ angle of trimming in full-aircraft powered pool model test data and speed, a relationship between the hydrodynamic resistance/thrust/ angle of trimming and the center of gravity, and the relationship between the hydrodynamic resistance/thrust/ angle of trimming and weight; finding feature points; carrying put segmentation fitting on the hydrodynamic resistance, the thrust and the angle of trimming to obtain the relational expressions of the hydrodynamic resistance, the thrust and the angle of trimming; obtaining the relational expression of the hydrodynamic resistance and the speed by combining with a CFD (Computational Fluid Dynamics) computation result or a wind tunnel test result; and quickly and effectively calculating the takeoff performance of the ground effect vehicle in different states according to an equation of motion of the ground effect vehicle. The invention provides a computation method suitable for the takeoff performance of the ground effect vehicle and provides a good condition for the total performance computation of the ground effect vehicle.

Description

technical field [0001] The invention relates to a method for solving the take-off performance of a ground-effect aircraft, which is used for analyzing the take-off performance of a ground-effect aircraft, and belongs to the technical field of the overall design of the aircraft. Background technique [0002] Ground effect aircraft is a vehicle that can fly close to water / ground at high speed. This type of aircraft makes full use of the principle of "ground effect", which can significantly reduce the induced drag of the wing and greatly improve the lift-drag ratio and lift coefficient during flight. It has broad application prospects in both military and civilian applications, and has attracted much attention from various countries. However, just because it can navigate in water and fly in the ground effect area (some ground effect aircraft can fly high over water), the analysis of its motion process is more complicated than that of conventional aircraft, thus increasing the c...

AI Technical Summary

Problems solved by technology

[0004] The technical solution problem of the present invention is: overcome the deficiencies in the prior art, provide a kind of ground-effect aircraft take-off performance solving method, solve the conventional ground-effect aircraft take-off performance calculation complexity and the shortcoming that the calculation result is not accurate enough, for the ground-effect aircraft overall Performance Analysis Provides Conditions

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