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Adjoint-Based Mesh Adaptation for the Sonic Boom Signature LoudnessThe mesh adaptation functionality of FUN3D is utilized to obtain a mesh optimized to calculate sonic boom ground signature loudness. During this process, the coupling between the discrete-adjoints of the computational fluid dynamics tool FUN3D and the atmospheric propagation tool sBOOM is exploited to form the error estimate. This new mesh adaptation methodology will allow generation of suitable meshes adapted to reduce the estimated errors in the ground loudness, which is an optimization metric employed in supersonic aircraft design. This new output-based adaptation could allow new insights into meshing for sonic boom analysis and design, and complements existing output-based adaptation techniques such as adaptation to reduce estimated errors in off-body pressure functional. This effort could also have implications for other coupled multidisciplinary adjoint capabilities (e.g., aeroelasticity) as well as inclusion of propagation specific parameters such as prevailing winds or non-standard atmospheric conditions. Results are discussed in the context of existing methods and appropriate conclusions are drawn as to the efficacy and efficiency of the developed capability.
Document ID
20170005868
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Rallabhandi, Sriram K. (National Inst. of Aerospace Hampton, VA, United States)
Park, Michael A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
June 29, 2017
Publication Date
June 5, 2017
Subject Category
Acoustics
Report/Patent Number
NF1676L-25762
Meeting Information
Meeting: AIAA Aviation 2017 Conference
Location: Denver, CO
Country: United States
Start Date: June 5, 2017
End Date: June 9, 2017
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 110076.02.07.03.12
Distribution Limits
Public
Copyright
Public Use Permitted.

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