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Multifidelity Design Optimization of Low-Boom Supersonic Jets Seongim Choi,
 

Summary: Multifidelity Design Optimization of Low-Boom Supersonic Jets
Seongim Choi,
Juan J. Alonso,
and Illan M. Kroo
Stanford University, Stanford, California 94305
and
Mathias Wintzer§
Desktop Aeronautics, Inc., Palo Alto, California 94301
DOI: 10.2514/1.28948
The practical use of high-fidelity multidisciplinary optimization techniques in low-boom supersonic business-jet
designs has been limited because of the high computational cost associated with computational fluid dynamics-based
evaluations of both the performance and the loudness of the ground boom of the aircraft. This is particularly true of
designs that involve the sonic boom loudness as either a cost function or a constraint because gradient-free
optimizationtechniquesmaybecomenecessary,leadingtoevenlargernumbersoffunctionevaluations.If,inaddition,
the objective of the design method is to account for the performance of the aircraft throughout its full-flight mission
while including important multidisciplinary tradeoffs between the relevant disciplines the situation only complicates.
To overcome these limitations,we propose a hierarchical multifidelity design approach where high-fidelity models are
only usedwhereandwhentheyareneededtocorrecttheshortcomingsofthelow-fidelitymodels.Ourdesignapproach
consists of two basic components: a multidisciplinary aircraft synthesis tool (PASS) that uses highly tuned low-fidelity
models of all of the relevant disciplines and computes the complete mission profile of the aircraft, and a hierarchical,

  

Source: Alonso, Juan J. - Department of Aeronautics and Astronautics, Stanford University
Stanford University - Department of Aeronautics and Astronautics, Aircraft Aerodynamics and Design Group

 

Collections: Engineering