NDLI: Aeroacoustic simulation of a nose landing gear in an open jet facility using fun3d

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Aeroacoustic simulation of a nose landing gear in an open jet facility using fun3d

Content Provider	NASA Technical Reports Server (NTRS)
Author	Khorrami, Mehdi R. Lockhard, David P. Vatsa, Veer N. Carlson, Jan-Renee
Copyright Year	2012
Description	Numerical simulations have been performed for a partially-dressed, cavity-closed nose landing gear configuration that was tested in NASA Langley s closed-wall Basic Aerodynamic Research Tunnel (BART) and in the University of Florida s open-jet acoustic facility known as UFAFF. The unstructured-grid flow solver, FUN3D, developed at NASA Langley Research center is used to compute the unsteady flow field for this configuration. A hybrid Reynolds-averaged Navier-Stokes/large eddy simulation (RANS/LES) turbulence model is used for these computations. Time-averaged and instantaneous solutions compare favorably with the measured data. Unsteady flowfield data obtained from the FUN3D code are used as input to a Ffowcs Williams-Hawkings noise propagation code to compute the sound pressure levels at microphones placed in the farfield. Significant improvement in predicted noise levels is obtained when the flowfield data from the open jet UFAFF simulations is used as compared to the case using flowfield data from the closed-wall BART configuration.
File Size	1666997
Page Count	18
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120010288
Archival Resource Key	ark:/13960/t6k122t88
Language	English
Publisher Date	2012-06-04
Access Restriction	Open
Subject Keyword	Acoustics Noise Propagation Computational Aeroacoustics Computational Fluid Dynamics Unstructured Grids Mathematics Unsteady Flow Microphones Flow Noise Navier-stokes Equation Large Eddy Simulation Ffowcs Williams-hawkings Equation Noise Intensity Turbulence Models Landing Gear Noise Prediction Aircraft Reynolds Averaging Wind Tunnel Tests Dynamic Models Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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