Numerical assessment of fan blades screen effect on fan/OGV interaction tonal noise. (1st September 2020)

• Record Type: Journal Article
• Authors: Foulquié, Charles; Khelladi, Sofiane; Deligant, Michael; Ramírez, Luis; Nogueira, Xesús; Mardjono, Jacky
• Is Part Of: Journal of sound and vibration. Volume 481(2020)
• Publication Date: 2020-09-01
• Subjects: Aeroacoustics -- Turbojet fan noise -- Outlet guide vane -- Turbomachines -- Linearized Euler equations -- Screen effect -- Fan -- High order finite volumes; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2020.115428
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: This work deals with sound generation and transmission in a fan stage. The study is done on a subsonic Fan stage and interaction noise between the fan wakes and the Outlet Guide Vanes (OGV) is considered. For this purpose, the Linearized Euler Equations (LEE) are solved with a steady axisymmetric flow. The acoustic sources are modelled by a scattering approach. Numerical simulations are carried out in an unwrapped cylindrical layer using a high-order finite volume solver. In order to explicitly take into account the moving fan blades into the propagation medium, a high-resolution sliding mesh technique is used. The simulation results, which highlight the screen effect of moving fan blades on fan/OGV interaction tones, are consistent with analytical literature. Highlights: Investigation of unknown acoustic modes transmission through a rotating blade cascade. High-order FV solver to take into account moving parts in complex acoustic propagation media. Continuous propagation cylindrical space to avoid binding periodic boundary conditions.