Investigation on rod-airfoil noise with high-order cell-centered finite difference method and acoustic analogy

被引：16

作者：

Jin, Yao ^{[1
]}

Liao, Fei ^{[1
,2
]}

Cai, Jinsheng ^{[1
]}

Morris, Philip J. ^{[3
]}

机构：

[1] Northwestern Polytech Univ, Sch Aeronaut, Xian 710072, Peoples R China

[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[3] Penn State Univ, Dept Aerosp Engn, University Pk, PA 16802 USA

来源：

AEROSPACE SCIENCE AND TECHNOLOGY | 2020年 / 102卷

基金：

中国国家自然科学基金;

关键词：

Aeroacoustics; Rod-airfoil configuration; Cell-centered finite difference method; Delayed detached eddy simulation; FW-H acoustic analogy; LARGE-EDDY SIMULATION; GEOMETRIC CONSERVATION LAW; SEPARATED FLOW; FFOWCS-WILLIAMS; PREDICTION; SCHEMES; EFFICIENT; CHANNEL; SOUND; IMPLEMENTATION;

D O I：

10.1016/j.ast.2020.105851

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

This paper focuses on the radiation noise of a rod-airfoil configuration based on a high-order cellcentered finite difference method (CCFDM) and Ffowcs Williams-Hawkings (FW-H) acoustic analogy. To reduce numerical dissipation and dispersion, a class of optimized compact schemes is firstly proposed and then validated with benchmark cases from computational aeroacoustic workshops. For turbulence, the delayed detached eddy simulation (DDES) with Spalart-Allmaras model is adopted and is validated through a canonical periodic hill problem. For the far-field radiated acoustics, the FW-H acoustic analogy is utilized with validation of laminar flow past NACA0012. Finally, a rod-airfoil configuration is investigated. The results show reasonable agreement with the experimental data in terms of both near-field aerodynamics and far-field acoustics. The interaction between the upstream turbulence wake from the rod and the downstream airfoil is evidenced to be the dominant contributor to the far-field noise. (C) 2020 Elsevier Masson SAS. All rights reserved.

引用

页数：22

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