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Efficient Near-Field to Mid-Field Sonic Boom Propagation Using a High-Order Space Marching MethodAn efficient strategy for propagating sonic boom signatures from a near-field Computational Fluid Dynamics (CFD) solution to the mid-field is presented. The method is based on a high-order accurate finite-difference discretization of the 3D Euler equations on a specially designed curvilinear grid and a single sweep space marching solution algorithm. The new approach leads to more than a factor of two reduction in overall computational resources compared to the current method used to propagate near-field sonic booms to the ground. Accuracy and efficiency of the near-field to mid-field process is demonstrated using a selection of test cases from the AIAA Sonic Boom Prediction Workshops. Azimuthal dependence of nonlinear wave propagation from the near-field to mid-field is analyzed along with its effects on the ground level noise.
Document ID
20190026555
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Housman, Jeffrey A. (NASA Ames Research Center Moffett Field, CA, United States)
Kenway, Gaetan K. (Science and Technology Corp. Moffett Field, CA, United States)
Jensen, James C. (NASA Ames Research Center Moffett Field, CA, United States)
Kiris, Cetin C. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
June 23, 2019
Publication Date
June 17, 2019
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
ARC-E-DAA-TN69561
Meeting Information
Meeting: AIAA Aviation 2019
Location: Dallas, TX
Country: United States
Start Date: June 17, 2019
End Date: June 20, 2019
Sponsors: American Institute of Aeronautics and Astronautics (AIAA), Airbus UK
Funding Number(s)
CONTRACT_GRANT: NNA16BD60C
Distribution Limits
Public
Copyright
Public Use Permitted.
Technical Review
NASA Peer Committee

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