| 王丹,白俊强,黄江涛,华俊,董建鸿.基于转捩/尺度适应模型与FW-H声学方程的气动噪声数值模拟研究[J].计算力学学报,2013,30(5):704~711 |
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| 基于转捩/尺度适应模型与FW-H声学方程的气动噪声数值模拟研究 |
| Research of the aeroacoustic noise simulation based on transition/scale-adapt model and FW-H equation |
| 投稿时间：2012-05-31 修订日期：2012-09-03 |
| DOI：10.7511/jslx201305019 |
| 中文关键词: 气动噪声 FW-H声学方程 γ-Reθt转捩模型 尺度适应模型 转捩/分离流模型 |
| 英文关键词:aeroacoustic noise Ffowcs Williams-Hawkings equation γ-Reθt transition model scale-adaptive model transition/separated flow mode |
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| 摘要点击次数: 2555 |
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| 中文摘要: |
| 采用计算流体力学(CFD)同"声类比"相结合的方法进行噪声模拟,利用CFD数值模拟 MD30P30N多段翼型失速攻角附近流场以及其气动特性来校核近场精度,进一步通过结合可穿透数据面的FW-H声学方程进行气动噪声分析。为了准确捕捉近场流场信息,为噪声预测提供可靠的声源精度,本文基于k-ω剪应力输运(SST)湍流模型,建立了尺度适应分离流(SAS)模型,并采用γ-Reθt转捩模型耦合k-ω SST湍流模型建立了边界层转捩数值模拟技术;充分利用尺度适应模型在边界层表现为雷诺平均(RANS)方法这一特点,将γ-Reθt转捩模型与SAS模型结合,建立针对包含转捩、分离现象复杂流场的数值模拟技术。文中以RANS为控制方程,分别采用全湍流k-ω SST模型、γ-ReθtSAS转捩/分离流模型对多段翼进行近场数值模拟计算,结合可穿透数据面的FW-H声学方程进行气动噪声预测,在分析其对流场及气动噪声影响的基础上,得出了几点结论。 |
| 英文摘要: |
| Combined the computational fluid dynamics (CFD) numerical simulation and the acoustics analogy method,the noise simulation on the multi-element airfoil of MD30P30N is presented.The CFD numerical simulation is used to compute the flow around MD30P30N multi-airfoil at the stall angle,and then the FW-H acoustics equation is combined to compute the aerodynamic noise.For giving the precise CFD result as the sound source,the scale-adaptive simulation of separate flow model which based on SST turbulent and the boundary transition simulation method which gives the coupling to γ-Reθt transition model and SST turbulent model are established.The scale-adaptive separate (SAS) flow model behaves the characters of the RANS method at the boundary layer.Based on the combination of the SAS model and the γ-Reθt transition model,the numerical simulation technique including transition and separation for the complex flow is constructed.With the RANS equation as the control equation,the full turbulent simulation through the k-ω SST model and the simulation through the γ-Reθt-SST-SAS transition model are used to compute the multi-element airfoil flow,respectively.The aerodynamic noise is computed through the FW-H equation based on the CFD solution.The results are analyzed at the aerodynamic view and the aerodynamic noise view,and several conclusions are given at the end of the paper. |
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