A diagnostic tool for jet noise using a line-source approach and implicit large-eddy simulation data

A diagnostic tool for jet noise using a line-source approach and implicit large-eddy simulation data
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使用线源方法和隐式大涡模拟数据的喷射噪声诊断工具

DOI:
10.1016/j.crme.2018.07.007
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发表时间:
2018
期刊:
Comptes Rendus Mécanique
影响因子:
--
通讯作者:
Margnat F
Margnat F
中科院分区:
--
文献类型:
--
作者:
Margnat F

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本研究的总体目标是开发和验证一种具有成本效益的混合喷气噪声预测工具,该工具可能在实验的准确性(在相同的操作条件下)和计算成本(挂钟时间和数据存储)之间提供具有竞争力的权衡。这种工具对于更安静的湍流射流的有效设计以及快速评估和比较不同的降噪策略至关重要。例如,为了减少飞机发动机产生的声音,波音公司,通用电气公司和美国宇航局几年前开发了锯齿状边缘,称为发动机排气喷嘴[1,2]。人字形通过控制空气在穿过发动机后和发动机周围的混合方式,有效地降低了喷气噪音。然而,影响这种控制解决方案的性能的大量参数使得它们的开发、测试和优化成为一项非常复杂的任务,可能需要大量高成本和耗时的试错迭代。为此,需要成本有效的诊断工具,以便在使用控制解决方案时量化如何修改声场,但更重要的是以有效的方式调整和比较控制解决方案的不同参数。对这种诊断工具的期望可以包括定量和定性标准,例如在没有任何经验常数的情况下对全局声级的正确估计,以及揭示方向性模式和频率内容的显著变化的能力。
The overall goal of the present study is to develop and validate a cost-effective hybrid jet noise prediction tool that could potentially offer a competitive trade-off between the accuracy of the experiments (in the same operating conditions) and the computational cost in terms of wall clock time and data storage. Such a tool could be critical for the efficient design of quieter turbulent jets and for quickly evaluating and comparing different noise mitigation strategies. For instance, to reduce the sound generated by aircraft engines, Boeing, General Electric, and NASA developed several years ago serrated edges called chevrons for engine exhaust nozzles [1, 2]. The chevrons effectively reduce jet noise by controlling the way the air mixes after passing through and around the engine. However, the large number of parameters affecting the performance of such a control solution makes their development, testing and optimisation a very complicated task, with potentially numerous high-cost and time-consuming trial-and-error iterations. For this reason, cost-effective diagnostic tools are needed in order to quantify how the acoustic field is modified when a control solution is used, but more importantly to adjust and compare different parameters of the control solution in an effective fashion. The expectation for such a diagnostic tool may include quantitative and qualitative criteria, such as a correct estimation of the global sound levels without any empirical constant, and an ability to reveal significant changes in the directivity pattern and frequency content.
DOI: --
发表时间: 2015
期刊:
影响因子: --
作者:
F. Margnat
通讯作者: F. Margnat
DOI: 10.1121/1.4921031
发表时间: 2015
期刊: The Journal of the Acoustical Society of America
影响因子: --
作者:
R. Serré;J. Robinet;F. Margnat
通讯作者: F. Margnat
一种计算气动声学积分的迭代算法,应用于自由剪切流噪声分析。
DOI: --
发表时间: 2010
影响因子: 2.4
作者:
F. Margnat;V. Fortuné
通讯作者: V. Fortuné
DOI: 10.1017/jfm.2013.346
发表时间: 2012-06
影响因子: 3.7
作者:
A. Cavalieri;D. Rodríguez;P. Jordan;T. Colonius;Y. Gervais
通讯作者: A. Cavalieri;D. Rodríguez;P. Jordan;T. Colonius;Y. Gervais
DOI: 10.1260/1475-472x.11.5-6.555
发表时间: 2012-10
影响因子: 1
作者:
C. Moser;E. Lamballais;F. Margnat;V. Fortuné;Yves Gervais
通讯作者: C. Moser;E. Lamballais;F. Margnat;V. Fortuné;Yves Gervais