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首页> 外文期刊>International Journal of Aeroacoustics >Similarity scaling of jet noise sources for low-order jet noise modelling based on the Goldstein generalised acoustic analogy
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Similarity scaling of jet noise sources for low-order jet noise modelling based on the Goldstein generalised acoustic analogy

机译：基于Goldstein广义声学类的低阶射流噪声源的相似性缩放

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>As a first step towards a robust low-order modelling framework that is free from either calibration parameters based on the far-field noise data or any assumptions about the noise source structure, a new low-order noise prediction scheme is implemented. The scheme is based on the Goldstein generalised acoustic analogy and uses the Large Eddy Simulation database of fluctuating Reynolds stress fields from the CABARET MILES solution of Semiletov et？al. corresponding to a static isothermal jet from the SILOET experiment for reconstruction of effective noise sources. The sources are scaled in accordance with the physics-based arguments and the corresponding sound meanflow propagation problem is solved using a frequency domain Green’s function method for each jet case. Results of the far-field noise predictions of the new method are validated for the two NASA SHJAR jet cases, sp07 and sp03 from and compared with the reference predictions, which are obtained by applying the Lighthill acoustic analogy scaling for the SILOET far-field measurements and using an empirical jet-noise prediction code, sJet.
机译：>作为朝向稳健的低阶建模框架的第一步，该框架不受基于远场噪声数据的校准参数或关于噪声源结构的任何假设，实现了新的低位噪声预测方案。该方案基于Goldstein广泛性的声学类比，并使用Semiletov et的呼吸码头的波动雷诺应力场的大涡流仿真数据库。对应于来自SILOET实验的静态等温射流，用于重建有效噪声源。根据物理为基础的参数来缩放来源，并且使用每个喷射箱的频域绿色的功能方法解决了相应的声音均线传播问题。新方法的远场噪声预测结果对于两种NASA Shjar喷射案例，SP07和SP03与参考预测进行了验证，该参考预测是通过对SILOET远场测量的灯光声学类比缩放而获得的并使用经验射流预测码SJET。

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