A review on generation and mitigation of airfoil self-induced noise

Ibren, Mohamed and Andan, Amelda Dianne and Asrar, Waqar and Sulaeman, Erwin (2022) A review on generation and mitigation of airfoil self-induced noise. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 90 (1). pp. 163-178. ISSN 2289-7879

Preview	PDF (SCOPUS) - Supplemental Material Download (282kB) | Preview
	PDF (Article) - Published Version Restricted to Registered users only Download (911kB) | Request a copy

Abstract

A review on passive acoustic control of airfoil self-noise by means of porous trailing edge is presented. Porous surfaces are defined using various terms such as porosity, permeability, resistivity, porosity constant, dimensionless permeability, flow control severity and tortuosity. The primary purpose of this review paper is to provide key findings regarding the sources and mitigation techniques of self-induced noise generated by airfoils. In addition, various parametric design concepts were presented, which are critically important for porous-airfoil design specifications. Most research focus on experimentation with some recent efforts on numerical simulations. Detail study on flow topology is required to fully understand the unsteady flow nature. In general, noise on the airfoil surface is linked to the vortex shedding, instabilities on the surface, as well as feedback mechanism. In addition, acoustic scattering can be minimized by reducing extent of the porous region from the trailing edge while increasing resistivity. Moreover, blowing might also be another means of reducing noise near the trailing edge. Ultimately, understanding the flow physics well provides a way to unveil the unknowns in self-induced airfoil noise generation, mitigation, and control.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Airfoil self-noise; aeroacoustics; porous
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering Kulliyyah of Engineering
Depositing User:	Dr. Amelda Dianne Andan
Date Deposited:	30 Sep 2022 08:51
Last Modified:	30 Sep 2022 09:07
URI:	http://irep.iium.edu.my/id/eprint/100345

Actions (login required)

View Item