论文部分内容阅读
湍流是流体力学中公认的难题,目前仍缺乏可靠的湍流模型对复杂流场进行准确数值预测,使真实飞行器外绕流流场对所载光学系统的气动光学效应分析相当复杂和困难。在湍流球涡模型的基础上,结合湍流物理几何特性和计算流体力学结果,引入真实流场条件,建立了一个新的气动光学效应仿真模型,分析了部分光学系统参数、流场参数对气动光学效应的影响。该仿真模型能根据不同的湍流状况调整参数,并能得到气动光学效应的多种仿真输出。结果表明,该模型能直观快速地分析气动光学效应随光学系统参数和湍流部分动力学行为的变化规律,其结论能为系统设计、试验指导和后期图像校正提供理论依据。
Turbulence is a recognized problem in fluid mechanics. At present, there is still a lack of a reliable turbulence model to accurately predict the complex flow field. It is quite complicated and difficult to analyze the aerosol optical effect of the actual flow field around the actual aircraft. Based on the turbulent turbulence model, a new aerodynamic simulation model is established based on the physical properties of turbulent flow and computational fluid dynamics, and the real flow field conditions are introduced. Some parameters of the optics system are analyzed, Effect of the effect. The simulation model can adjust the parameters according to different turbulence conditions, and can obtain a variety of simulation output of aerodynamic optical effect. The results show that the model can intuitively and quickly analyze the variation of aerodynamic effects with the parameters of the optical system and the dynamic behavior of the turbulent part. The conclusion can provide theoretical basis for system design, test guidance and post-calibration of images.