针对气动光学效应的RANS计算方法研究
A study on RANS computation for aerooptical effects
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摘要: 针对气动光学效应研究的特殊需求,发展了相应的RANS计算方法。首先对常规湍流模型进行评估,选出对平均密度空间分布预测较好的湍流模型;同时发展了光波折射率脉动值的输运方程,用以模化脉动密度对光学成像的畸变效应。针对一典型光学头罩作为研究对象,运用本文发展的计算方法对光学窗口流场的气动光学效应进行了计算和分析。Abstract: A RANS method for aerooptical effects has been developed. An evaluation of compressible flow RANS model has been conducted and a model had been chosen to predict main flow density distribution better. A convect equation had been used to model the refractive index fluctuation. The aerooptical effects over a aerooptical turret is evaluated and analyzed using the method developed in this paper.