Efficient Near-Field to Mid-Field Sonic Boom Propagation using a High-Order Space Marching Method

Speaker: Jeffrey Housman, Computational Aerosciences Branch, NASA Advanced Supercomputing Division
August 13, 2019

Presentation

Abstract

An 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.

Biography

Jeffrey Housman received his Bachelor of Science in Mathematics from Sonoma State University in 2000 and his Ph.D. in Applied Mathematics from U.C. Davis in 2007. Housman came to NASA Ames Research Center in 2001 and has been working with Cetin Kiris in the LAVA group in the Computational Aerosciences Branch of the NASA Advanced Supercomputing Division. In LAVA, his work has been focused on developing a high-order high-performance structured overset curvilinear grid solver and far-field aeroacoustic propagation/scattering modules. Housman has worked on a wide range of NASA mission related applications including launch vehicle takeoff and ascent analysis, aeroacoustic analysis of high-lift devices, and noise generation from propulsion systems such as open rotors and jets. He has a received a NASA Individual Achievement Award for his work on the Space Launch System in 2012 and the NASA Early Career Achievement Metal in 2013.

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