TY  - JOUR
TI  - Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation
AB  - Flow along a cavity is of special interest for researchers due to the occurrence of free shear layer flowand related high levels of sound and pressure forces. In this study, turbulent flow along an open cavityat a low inlet Mach number (Ma = 0.034) is modelled by Large Eddy Simulations (LES). The velocityprofiles at various stations inside the open cavity are compared to available experimental data. It isfound that LES results agree with experimental data and detects the transient pressure change in theflow field satisfactorily. Transient pressure data in the flow field is evaluated in acoustic analogy. Thenoise generated by the cavity is compared with the established Rossiter modes and is found to bereasonable. To create an effect on the sound pressure levels (SPL), a small obstacle with quadrilateralcross section is immersed in the shear layer at three different locations. This causes that the SPL peaksare reduced compared to the case without any obstacle. Thus, cavity-induced noise form specificfrequencies are redistributed to high frequency broadband noise as a result of this passive flowcontrol method.
AU  - COŞKUN, Furkan
AU  - Cadirci, Sertac
DO  - 10.21205/deufmd.2020226425
PY  - 2020
JO  - Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi
VL  - 22
IS  - 64
SN  - 1302-9304
SP  - 259
EP  - 269
DB  - TRDizin
UR  - http://search/yayin/detay/371170
ER  -