中文版 | English
Title

Numerical Investigation of Airfoil Self-noise Control by Trailing-edge Blowing

Author
Corresponding AuthorLiu, Yu
DOI
Publication Years
2022-06-14
Conference Name
28th AIAA/CEAS Aeroacoustics Conference
Source Title
Volume
AIAA Paper 2022-3013
Conference Date
14-17 June, 2022
Conference Place
Southampton, UK
Abstract

Large eddy simulation and Ffowcs Williams-Hawkings acoustic analogy are performed to study the effect of trailing-edge blowing on airfoil self-noise. The chord-based Reynolds number is 4 × 10 at a zero angle of attack for a NACA 0012 airfoil. Firstly, the aerodynamic and aeroacoustic characteristics of the baseline airfoil were thoroughly verified by comparison with previous numerical and experimental data. Secondly, the noise reduction effects of continuous and local blowing with different blowing momentum coefficients and blowing flow rate ratios were compared. Finally, a maximum noise reduction of 20 dB achieved via trailing-edge blowing is presented along with a discussion of the noise reduction mechanisms of the two blowing methods. The vortex shedding is suppressed by the blowing at the trailing edge, the shear layer at the trailing edge is stabilized, and instantaneous vorticity and root mean square velocity fluctuations are weakened. It is also found that there is a decrease in the spanwise coherence and an increase in the phase difference, which can account for noise reduction. The noise reduction mechanisms of blowing at the trailing edge can inspire further noise reduction by blowing.

SUSTech Authorship
First ; Corresponding
Language
English
URL[Source Record]
Indexed By
EI Accession Number
20223112461778
EI Keywords
Acoustic noise ; Aeroacoustics ; Airfoils ; Angle of attack ; Large eddy simulation ; Reynolds number ; Shear flow
ESI Classification Code
Fluid Flow:631 ; Fluid Flow, General:631.1 ; Aerodynamics, General:651.1 ; Aircraft, General:652.1 ; Acoustics, Noise. Sound:751 ; Acoustic Noise:751.4 ; Mathematics:921
Scopus EID
2-s2.0-85135088979
Data Source
Scopus
Publication Status
正式出版
Citation statistics
Cited Times [WOS]:0
Document TypeConference paper
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/365068
DepartmentDepartment of Mechanics and Aerospace Engineering
Affiliation
1.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
2.Key Laboratory of Aerodynamic Noise Control, China Aerodynamics Research and Development Center, Mianyang, Sichuan, 621000, China
First Author AffilicationDepartment of Mechanics and Aerospace Engineering
Corresponding Author AffilicationDepartment of Mechanics and Aerospace Engineering
First Author's First AffilicationDepartment of Mechanics and Aerospace Engineering
Recommended Citation
GB/T 7714
Yang, Chenghao,Liu, Yu,Yang, Yannian,et al. Numerical Investigation of Airfoil Self-noise Control by Trailing-edge Blowing[C],2022.
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