【摘要】 针对细光束在飞行器外流场中传输受流场影响的问题,发展了光波标量衍射方程和气体运动的完全可压缩Navier-Stokes方程耦合的方法,并结合长度加权插值技术,对光束在飞行器定常外流场中传输的情形进行了数值仿真分析·结果表明,通过飞行器外流场的光束会发生偏转和离焦,为保证飞行器上光学装置的正常工作,须考虑必要的调校或补偿·更多还原

【Abstract】 A numerical study was carried out for the aero-optical effects of flow around an aircraft on laser beam propagation. Beam propagation is described by the paraxial scalar wave equations, solved by the phase-screen technique and the FFT method. Air density variation is governed by the complete Navier-Stokes equations which are solved by using the LU-SGS factorization technique. The numerical results show that the deflection and defocus effects would be significant due to the variation of flow field. Thus, the necessary compensation should be in consideration when use optical instruments on aero-craft.更多还原