Abstract

Atmospheric turbulence is an important issue for successful flight in aeronautical experimentation. In the virtual test of aircraft, building a three-dimensional atmospheric turbulence field (3D-ATF) is necessary for integral simulation. Most classical methods which were based on building one-dimensional atmospheric turbulence simulation do not suit simulating the 3D-ATF. And several existing 3D-ATF simulation methods were not applicable in a large 3D space. This paper that addresses these problems proposes a new method for generating 3D-ATF based on the correlation function. The recursive formulae for the generation of 3D-ATF are deduced based on the self-correlation function and one step correlation function, and the original 3D-ATF is obtained. To achieve the good statistical characteristic the original 3D-ATF is optimized by the twice filtering. The new method is applied to build a 400 × 400 × 400 atmospheric turbulence field. Simulation results indicate that the relativity of 3D-ATF based on the correlation function method is near to the theoretic value. And the relativity of the 3D-ATF optimized by filtering performs the better fitting characteristics to the theoretic value. Consequently, the proposed simulation method is effective for building 3D-ATF in virtual test of aircraft.

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