Numerical Prediction of Exhaust Fan-Tone Noise from High-Bypass Aircraft Engines

Autor:	Simon Richards, Trevor Howard Wood, Chingwei M. Shieh, Anupam Sharma
Rok vydání:	2009
Předmět:	Noise power Acoustics Aerospace Engineering Turbojet Wake Euler equations Physics::Fluid Dynamics Rotor–stator interaction symbols.namesake Noise symbols Aeroacoustics Reynolds-averaged Navier–Stokes equations Mathematics
Zdroj:	AIAA Journal. 47:2866-2879
ISSN:	1533-385X 0001-1452
DOI:	10.2514/1.42208
Popis:	The ability to accurately predict fan noise is important in designing and optimizing aircraft engine turbofans for low noise emissions. In this paper, a prediction methodology for exhaust fan tone noise analysis is described and validated against various canonical test cases and NASA Source Diagnostic Test (SDT) 1,2 data. The prediction process consists of solving Reynolds-Averaged Navier-Stokes (RANS) equations to compute the fan wake, and calculating the acoustic response of the outlet guide vanes (OGV) to the fan wake using linearized Euler equations. Very good agreement is observed between numerical predictions and semi-analytical results for canonical cases. Detailed comparisons against SDT data are presented for unsteady vane pressure and integrated in-duct exhaust noise power levels. Geometric trends for dierent OGV configurations at various operating conditions are also analyzed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cba6fc21228264d40b567b0b817a6c72 https://doi.org/10.2514/1.42208 Zobrazit plný text záznamu