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Development of Computational Aeroacoustics Tools for Airframe Noise Calculations

机译:用于机身噪声计算的计算航空声学工具的开发

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This paper discusses the development of computational aeroacoustics (CAA) tools for airframe noise analysis and prediction. We review recent progress in this topic, but emphasize our vision for the future development of such tools. Our intention is for this vision to drive future CAA research in directions that will accelerate widespread use of CAA for airframe noise applications. We discuss the needs for accuracy, efficiency, and easy interface with other design tools and illustrate how CAA tools may help future aircraft design. We explain what appears to be achievable in a 20-year time frame, and what goals will probably take longer. Important barrier issues include the effects of numerical dispersion and dissipation, the treatment of highly curved, irregular boundary surfaces, and grid generation. Beyond these largely numerical issues, we discuss the role of physics-based modeling, including turbulence modeling in unsteady flow computations and the importance of developing sophisticated techniques for analyzing results of computations. Numerical simulations combined with the acoustic analogy methodology to predict noise are also reviewed. Finally, we discuss how to use recent advances in measurement techniques for CAA tool validation, which is an integral part of future development.
机译:本文讨论了用于飞机噪声分析和预测的计算航空声学(CAA)工具的开发。我们回顾了该主题的最新进展,但强调了我们对此类工具的未来发展的愿景。我们的目标是实现这一愿景,以推动CAA的未来研究,从而加速CAA在机身噪声应用中的广泛使用。我们讨论了与其他设计工具的准确性,效率和便捷接口的需求,并说明了CAA工具如何帮助未来的飞机设计。我们解释了20年内可能实现的目标,以及可能需要更长的时间的目标。重要的障碍问题包括数值分散和耗散的影响,高度弯曲,不规则边界表面的处理以及网格生成。除了这些主要是数值问题之外,我们还将讨论基于物理的建模的作用,包括非恒定流计算中的湍流建模,以及开发用于分析计算结果的复杂技术的重要性。还回顾了将数值模拟与声学类比方法相结合以预测噪声的方法。最后,我们讨论如何使用测量技术的最新进展进行CAA工具验证,这是未来开发的组成部分。

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