Helicopter flight characteristic computing method considering entire-helicopter aerodynamic interaction

Abstract

The present invention discloses a helicopter flight characteristic computing method considering entire-helicopter aerodynamic interaction. The method comprises: a helicopter balancing computing method with coupling aerodynamic interaction, a helicopter manipulation response computing method with coupling aerodynamic interaction, and a helicopter stability computing method with coupling aerodynamic interaction. A helicopter entire-helicopter aerodynamic interaction computing model is established by using a vortex panel method and a viscous vortex particle method, and the computing efficiency is improved with two acceleration techniques of multi-pole expansion and vortex element reconstruction, so as to complete helicopter entire-helicopter interaction flow field computation, and solve efficiency and precision problems of helicopter entire-helicopter interaction flow field computation. The entire-helicopter aerodynamic interaction computing model is coupled with a helicopter fight dynamic model; a coupling computation method is established; and an efficient and highly precise flight characteristic computing method that thoroughly makes an aerodynamic interaction wind tunnel test obsolete is formed, thereby achieving the objectives of improving helicopter flight characteristic computation precision and shortening an aerodynamic configuration design cycle. The computing method is applicable to all flight statuses in available helicopter envelopes.

Description

technical field [0001] The invention relates to the technical field of helicopter overall design, in particular to a method for calculating flight characteristics of a helicopter considering the aerodynamic interference of the whole machine, which can be applied to the calculation and analysis of flight performance and flight quality in the process of helicopter aerodynamic layout design in the helicopter concept and preliminary design stages. Background technique [0002] The aerodynamic layout design of the whole helicopter is one of the main contents in the overall design, which includes the determination of the aerodynamic shape, parameters and relative positions of the various parts of the helicopter. Whether the helicopter has good flight characteristics (including trim characteristics, stability, maneuverability and flight performance, etc.) is largely determined by the aerodynamic layout, so the aerodynamic layout design is at the core of the overall design of the hel...

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Problems solved by technology

[0010] The purpose of the present invention is to solve the shortcomings of the existing flight characteristics calculation method in the aerodynamic layout engineering design of the helicopter, and propose a helicopter flight characteristics calculation method that does not depend on the aerodynamic interference wind tunnel test data, and has hi

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