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Computational and Experimental Study of Plume and Shock Interaction Effects on Sonic Boom in the NASA Ames 9x7 Supersonic Wind TunnelA wind tunnel test was performed in the NASA Ames 9x7 Supersonic Wind Tunnel focusing on the shock waves traveling through and interacting with an exhaust nozzle plume. This experimental study was conducted to develop and validate the CFD capability required to accurately include nozzle flow with impinging shock effects on near field and ground‐propagated sonic boom signatures. The model was made to be generic, and included a simple nozzle shape, two different aft decks, and a few generic horizontal tails. High pressure air was pumped through a nozzle at various nozzle pressure ratios (NPR) to represent the engine plume in flight. The three different aft body representations each created a different shock wave signature that passed through the plume. An aft deck configuration, where part of the aircraft shields the nozzle plume, was also tested. Retroreflective Background-Oriented Schlieren (RBOS) was used to obtain schlieren images of the flow field around the model and behind the model. This study compares wind tunnel data and numerical simulations conducted by the NASA Tetrahedral Unstructured Software System CFD code, USM3D.
Document ID
20180006298
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Winski, Courtney S.
(NASA Langley Research Center Hampton, VA, United States)
Carter, Melissa B.
(NASA Langley Research Center Hampton, VA, United States)
Elmiligui, Alaa A.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Pearl, Jason M.
(Vermont Univ. Burlington, VT, United States)
Nayani, Sudheer N.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Durston, Donald
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
October 16, 2018
Publication Date
January 8, 2018
Subject Category
Acoustics
Report/Patent Number
NF1676L-28904
Meeting Information
Meeting: AIAA SciTech Forum & Exposition (SciTech 2018)
Location: Kissimmee, FL
Country: United States
Start Date: January 8, 2018
End Date: January 12, 2018
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 432938.11.01.07.43.40.01
Distribution Limits
Public
Copyright
Public Use Permitted.
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