Numerical Simulation Method of Anisotropic Atmospheric Turbulence Field

Abstract

The invention relates to an anisotropy atmospheric turbulence field numerical simulation method. The method includes: analyzing random wind speed correlation among various points of an atmospheric turbulence field inlet plane to generate a random wind speed correlation matrix; generating atmospheric turbulence field simulation area excitation data according to the random wind speed correlation matrix; setting the size, boundary and obstacles an atmospheric turbulence field to form an atmospheric turbulence field simulation area; delivering the excitation data into the atmospheric turbulence field simulation area, dynamically performing anisotropy atmospheric turbulence field numerical simulation, and the like. The method has the advantages that the anisotropy wind field is generated according to a Von Karman speed correlation model and used as the simulation area excitation wind field; turbulence simulation is performed by using a wind tunnel as the reference, corresponding obstacles are set for the simulation area, computational fluid dynamics software is used to dynamically perform numerical simulation on the excitation wind field in the simulation area, and the practical anisotropy turbulence field can be obtained; experiment results show that the method can effectively simulate the atmospheric turbulence field.

Description

technical field [0001] The invention belongs to the technical field of numerical simulation of turbulent flow field, and in particular relates to a numerical simulation method of anisotropic atmospheric turbulent flow field. Background technique [0002] Atmospheric turbulence is an irregular atmospheric fluctuation phenomenon formed by the superposition of eddies of different scales. It is expected that by 2050, as atmospheric CO 2 As the concentration increases, the overall intensity of turbulent flow will increase by 10%-40%, and the frequency of occurrence will increase by 40%-170%. The existence of atmospheric turbulence seriously threatens the safety of aircraft flying in the atmosphere. The high-precision numerical simulation of atmospheric turbulence will help to promote the improvement of aircraft detection technology for atmospheric turbulence, so that aircraft can effectively avoid areas of high-intensity atmospheric turbulence to ensure aviation safety. [000...

AI Technical Summary

Problems solved by technology

However, the current numerical simulation methods of atmospheric turbulence are all based on the assumption of isotropic turbulence field, and cannot simulate anisotropic turbulence field

Low-altitude wind shear is a special form of atmospheric turbulence with anisotropic characteristics, but its formation mechanism is the turbulence in the near-low-altitude area formed by high-speed vertical wind hitting the surface, and the related simulation methods are not suitable for the numerical value of conventional atmospheric turbulence simulation

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