Computational and Experimental Assessment of Models for the First AIAA Sonic Boom Prediction Workshop

Speaker: Susan Cliff, NASA Ames Research Center
February 4, 2014

Presentation

Abstract

Near-field sonic boom pressure signatures were measured and computational predictions made for a Lockheed-Martin Aeronautics Company low-boom supersonic transport concept, an axisymmetric calibration model, and a 69° swept delta wing-body configuration. The pressure signatures were measured in the NASA Ames 9- by 7-Foot Supersonic Wind Tunnel at Mach 1.6 and 1.7 in 2011 and 2012. Accurate sonic boom data were obtained using spatially averaged pressure signatures measured with a minimally intrusive pressure rail. Selected data from these tests are being used in the First AIAA Sonic Boom Prediction Workshop in January 2014. High-fidelity numerical simulations of on- and off-track pressure signatures are compared with spatially/temporally averaged experimental results. Numerical results using Mach cone aligned meshes for structured and unstructured flow solvers are presented with good agreement between the computational simulations and experiment.

Biography

Susan Cliff obtained a B.A. in Applied Mathematics from California State University Chico in 1983. She has been an aerospace engineer at NASA Ames for nearly 30 years. She has been involved in vehicle design and analysis for the greater part of her career. She has also participated in many 9x7 wind tunnel tests for sonic boom and/or vehicle performance. Her current research is focused on the near-field prediction of sonic boom.

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