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CFD-CAA Coupled Calculations of a Tandem Cylinder Configuration to Assess Facility Installation EffectsThis paper presents a numerical assessment of acoustic installation effects in the tandem cylinder (TC) experiments conducted in the NASA Langley Quiet Flow Facility (QFF), an open-jet, anechoic wind tunnel. Calculations that couple the Computational Fluid Dynamics (CFD) and Computational Aeroacoustics (CAA) of the TC configuration within the QFF are conducted using the CFD simulation results previously obtained at NASA LaRC. The coupled simulations enable the assessment of installation effects associated with several specific features in the QFF facility that may have impacted the measured acoustic signature during the experiment. The CFD-CAA coupling is based on CFD data along a suitably chosen surface, and employs a technique that was recently improved to account for installed configurations involving acoustic backscatter into the CFD domain. First, a CFD-CAA calculation is conducted for an isolated TC configuration to assess the coupling approach, as well as to generate a reference solution for subsequent assessments of QFF installation effects. Direct comparisons between the CFD-CAA calculations associated with the various installed configurations allow the assessment of the effects of each component (nozzle, collector, etc.) or feature (confined vs. free jet flow, etc.) characterizing the NASA LaRC QFF facility.
Document ID
20110015465
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Redonnet, Stephane (French Aerospace Center France)
Lockard, David P. (NASA Langley Research Center Hampton, VA, United States)
Khorrami, Mehdi R. (NASA Langley Research Center Hampton, VA, United States)
Choudhari, Meelan M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
June 6, 2011
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
NF1676L-11625
Meeting Information
Meeting: 17th AIAA/CEAS Aeroacoustics Conference
Location: Portland, OR
Country: United States
Start Date: June 6, 2011
End Date: June 8, 2011
Sponsors: American Inst. of Aeronautics and Astronautics, National Oceanic and Atmospheric Administraion
Funding Number(s)
WBS: WBS 561581.02.08.07.18.18
Distribution Limits
Public
Copyright
Public Use Permitted.

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