气动效应地面模拟装置光学窗口设计与评价

气动热效应地面模拟装置是航空载荷成像性能地面检测设备的核心部分。本文设计了一种光学窗口用于气动热效应地面模拟装置,使用理论计算与模型仿真相结合的方式,严谨地阐述气动环境下光学窗口的设计理论。首先使用计算流体动力学理论(Computational Fluid Dynamics,CFD)进行仿真,计算给定条件下的气动压力和温度值,给出最严苛的条件值;然后根据经典强度理论和断裂力学理论,提出光学材料加工工艺要求,并设计窗口满足安全使用要求的厚度;最后依据流固热耦合仿真分析,验证设计的合理性,并依据导致载荷光学成像质量下降程度的变形量优化窗口的厚度。

The Design and Evaluation of Optical Window for the Aerodynamic Heating Effect Simulation Device on the Ground

Aerodynamic heating effect simulation device on the ground is the core part of ground testing equipment for aero-load imaging performance. We design an optical window for aerodynamic heating effects simulation device on the ground. Using the combination of theoretical calculation and simulation model, we elaborate optical window design theory in the aerodynamic environment. First, we use the theory of Computational Fluid Dynamics (CFD) to do a simulation, and achieve the toughest condition value by computing pressure and temperature values. Then according to the classical strength theory and fracture mechanics, we propose the requirements of optical materials processing, and design the thickness of the window meeting the security requirements. At last, we verify that it is a rational design by means of the coupled simulation of fluid-solid thermal, and optimize the thickness of the window according to optical imaging quality.