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一种用于通过瞬态模拟分析气动光学效应的新方法。

A New Method for Analyzing Aero-Optical Effects with Transient Simulation.

作者信息

Yang Bo, Fan Zichen, Yu He, Hu Haidong, Yang Zhaohua

机构信息

School of Astronautics, Beihang University, Beijng 100191, China.

The Science and Technology on Space Intelligent Control Laboratory of China, Beijing 100190, China.

出版信息

Sensors (Basel). 2021 Mar 21;21(6):2199. doi: 10.3390/s21062199.

DOI:10.3390/s21062199
PMID:33801111
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8004080/
Abstract

Aero-optical effects reduce the accuracy of optical sensors on high-speed aircraft. Current research usually focuses on light refraction caused by large-scale density structures in turbulence. A method for analyzing photon energy scattering caused by micro-scale structures is proposed in this paper, which can explain the macro image distortion caused by moving molecules in inhomogeneous airflow. Quantitative analysis of the propagation equation indicates that micro-scale structures may contribute more to the wavefront distortion than the widely considered large-scale structures. To analyze the micro mechanism of aero-optical effects, a transient simulator is designed based on the scaling model of transient distorted wavefronts and the artificial vortex structure. The simulation results demonstrate that correct aero-optical phenomena can be obtained from the micro mechanism of photon energy scattering. Examples of using the transient simulator to optimize the parameters of the star sensor on a hypersonic vehicle are provided. The proposed analysis method for micro-scale structures provides a new idea for studying the aero-optical effects.

摘要

气动光学效应会降低高速飞行器上光学传感器的精度。当前的研究通常集中在湍流中大规模密度结构引起的光折射上。本文提出了一种分析由微观尺度结构引起的光子能量散射的方法，该方法可以解释非均匀气流中运动分子导致的宏观图像失真。对传播方程的定量分析表明，微观尺度结构可能比广泛认为的大尺度结构对波前畸变的影响更大。为了分析气动光学效应的微观机制，基于瞬态畸变波前的尺度模型和人工涡旋结构设计了一个瞬态模拟器。仿真结果表明，从光子能量散射的微观机制可以获得正确的气动光学现象。提供了使用瞬态模拟器优化高超声速飞行器上星敏感器参数的实例。所提出的微观尺度结构分析方法为研究气动光学效应提供了新思路。

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本文引用的文献

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Experimental investigation on aero-optical effects of a hypersonic optical dome under different exposure times.高超声速光学整流罩在不同曝光时间下气动光学效应的实验研究
Appl Opt. 2020 May 1;59(13):3842-3850. doi: 10.1364/AO.387513.
2
Experimental investigation on aero-optics of supersonic turbulent boundary layers.超声速湍流边界层气动光学的实验研究
Appl Opt. 2017 Sep 20;56(27):7604-7610. doi: 10.1364/AO.56.007604.
3
Aero-optical effects of an optical seeker with a supersonic jet for hypersonic vehicles in near space.用于临近空间高超声速飞行器的带超声速喷流光学导引头的气动光学效应
Appl Opt. 2016 Jun 10;55(17):4741-51. doi: 10.1364/AO.55.004741.
4
Development of a temporal evolution model for aero-optical effects caused by vortices in the supersonic mixing layer.超音速混合层中涡旋引起的气动光学效应的时间演化模型的开发。
Appl Opt. 2016 Apr 1;55(10):2708-17. doi: 10.1364/AO.55.002708.
5
Localization of angular momentum in optical waves propagating through turbulence.角动量在湍流中传播的光波中的局域化
Opt Express. 2011 Dec 5;19(25):25388-96. doi: 10.1364/OE.19.025388.