An aero-optical evaluation method was presented forthe investigation on high speed flow's aero-optical characteristics. The refraction factor which could denote the aero-optical effects of fiowfield was derived from the principle of refraction. The planar stabilities of refraction factor distribution in mean flow and refraction factor fluctuation in fluctuation flow were statistically estimated. The integrative evaluation was the combination of two statistical planar stabilities. The result shows that the mean flow's aero-optical effects are mainly caused by the shock wave while the fluctuation flow's aero-optical effects are caused by turbulence boundary layer. The flow's aero-optical effects reaches minimum when the angle of incident ray is near 45 degrees. The aero-optical effects grow stronger as the Mach number increases. The aero-optical effects become weaker as the angle of attack increases. The results agree well with the theoretical predictions, and it is practical for engineering application.%针对高速流场的气动光学机理研究,从流场的角度提出了高速流场气动光学效应的评价方法,并进行实际应用.首先基于光线追迹法的折射原理推导出表征流场的气动光学特性偏折因子,然后采用统计理论对时均流场的偏折因子与脉动流场的偏折因子脉动进行流向与法向的平面稳定性分析,最后综合时均与脉动流场的偏折因子平面稳定性联合建立高速流场的气动光学效应评价指标.通过在尖劈模型上的应用,结果表明时均流场的气动光学效应主要由激渡造成,脉动流场的气动光学效应主要由近壁面湍流边界层造成;入射光与光学窗口成近45°角时流场的气动光学效应最小,随着马赫数增大流场的气动光学效应加剧,随着攻角增大流场的气动光学效应降低.所得应用结果与理论分析相吻合,该方法具有工程实用价值.
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