Aerodynamics of Fan Flow Deflectors for Jet Noise Suppression
نویسندگان
چکیده
منابع مشابه
Aerodynamics of Fan Flow Deflectors for Jet Noise Suppression
We present a three-dimensional Reynolds-averaged Navier–Stokes investigation of the impact on nozzle aerodynamic performance of deflector vanes used for noise suppression in separate-flow turbofan engines. The vanes are installed in the bypass duct and deflect the bypass plume downward relative to the core plume. This study considers a single pair of vanes, with a NACA 0012 airfoil section, ins...
متن کاملParametric Study of Fan Flow Deflectors for Jet Noise Suppression
This is continuation of experimental work at U.C. Irvine on fan flow deflection (FFD) [1]. The working principle of FFD is reduction of the convective Mach number of turbulent eddies that generate intense downward and sideward sound radiation. In a coaxial separate-flow turbofan engine this is achieved by tilting in the general downward direction, by a few degrees, the bypass (secondary) plume ...
متن کاملAerodynamic Performance of Fan-Flow Deflectors for Jet-Noise Reduction
This paper presents a computational study on the aerodynamic effectiveness of vane-type fan-flow deflectors used for reducing jet noise from a supersonic turbofan exhaust with bypass ratio of 2.7. The numerical code solved the three-dimensional Reynolds-averaged Navier–Stokes equations. A series of nozzle configurations using deflector vanes of variable number, airfoil section, azimuthal mounti...
متن کاملJet Noise Suppression with Fan Flow Deflectors in Realistic-shaped Nozzle
This is an exploratory study of jet noise reduction using fan flow deflectors in a nozzle shaped like the exhaust of a separate-flow turbofan engine with bypass ratio 4.8. The deflectors directed the bypass plume downward and/or sideward relative to the core plume. Vaneand wedge-type deflectors were tested. The noise reduction achieved by the vane deflector was strong in the downward direction ...
متن کاملComputation of the Flow of a Dual-Stream Jet with Fan-Flow Deflectors for Noise Reduction
This paper studies the impact of installing noise-suppressing deflector vanes in the bypass flow on the aerodynamic performance of the dual-stream supersonic nozzle of a turbofan engine by using a three-dimensional Reynolds-averaged Navier-Stokes computer program. A series of nozzle configurations using a single pair or double pairs of vanes with NACA0012, NACA4412, and NACA7514 airfoil profile...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Propulsion and Power
سال: 2008
ISSN: 0748-4658,1533-3876
DOI: 10.2514/1.33415