A new method for analysing photon-scattering in high-speed turbulence

Optical scattering caused by the high-speed turbulence will reduce the accuracy of optical sensors on aircraft. The existing research mainly focuses on the scattering field on the macro scale. A new method to analyse the photon-scattering characteristics in high-speed turbulence from the micro point of view is proposed in this paper, which can explain the micro disturbance of airflow molecules to photons. In order to construct the relationship between micro disturbance and macro distortion, molecular clusters are proposed to describe the multi-molecular scattering field, and the scattering characteristics of molecular clusters with wavelength, density and vortex shape are obtained by statistical method. The simulation results show that the coherent superposition of scattered waves is the dominant factor of the micro scattering characteristics of molecular clusters. The method proposed in this paper provides a new idea for the study of aero-optics under complex flow conditions.