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Under-Track CFD-Based Shape Optimization for a Low-Boom Demonstrator ConceptThe detailed outer mold line shaping of a Mach 1.6, demonstrator-sized low-boom concept is presented. Cruise trim is incorporated a priori as part of the shaping objective, using an equivalent-area-based approach. Design work is performed using a gradient-driven optimization framework that incorporates a three-dimensional, nonlinear flow solver, a parametric geometry modeler, and sensitivities derived using the adjoint method. The shaping effort is focused on reducing the under-track sonic boom level using an inverse design approach, while simultaneously satisfying the trim requirement. Conceptual-level geometric constraints are incorporated in the optimization process, including the internal layout of fuel tanks, landing gear, engine, and crew station. Details of the model parameterization and design process are documented for both flow-through and powered states, and the performance of these optimized vehicles presented in terms of inviscid L/D, trim state, pressures in the near-field and at the ground, and predicted sonic boom loudness.
Document ID
20160006034
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Wintzer, Mathias (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Ordaz, Irian (NASA Langley Research Center Hampton, VA, United States)
Fenbert, James W. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Date Acquired
May 11, 2016
Publication Date
June 22, 2015
Subject Category
Aerodynamics
Aircraft Design, Testing And Performance
Acoustics
Report/Patent Number
NF1676L-20055
Meeting Information
Meeting: AIAA Applied Aerodynamics Conference
Location: Dallas, TX
Country: United States
Start Date: June 22, 2015
End Date: June 26, 2015
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 475122.02.07.02.01
CONTRACT_GRANT: NNL12AA09C
Distribution Limits
Public
Copyright
Public Use Permitted.

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