Volterra Series Reduced Order Modeling of Nonlinear Aerodynamics

Maciej Balajewicz
Special Instructions: 
Lunch and beverages will be served
Tuesday, October 7, 2008 - 12:00pm
Hudson Hall Room 216
Seminar Contact(s): 
Elizabeth Irish eri@duke.edu or Justin Jaworski jwj@duke.edu
Semester & Year: 
Fall 2008
Due to the presence of aerodynamic nonlinearities in transonic aeroelasticity, Computational Fluid Dynamics (CFD) has become the most reliable tool for its analysis. However, the large computational resources required for such high fidelity analysis renders the approach undesirable, especially during the initial and conceptual design stages. As a result, there has been a great deal of interest in reduced-order-models (ROMs) of the transonic nonlinear system. Among the many ROM methods available, the most popular include proper orthogonal decomposition, harmonic balance, and the Volterra series. This seminar summarizes recent progress of the Volterra series ROM approach to nonlinear transonic aerodynamic systems. Specifically, methods which alleviate the computational burdens (i.e. the curse of dimensionality) associated with Volterra series identification will be presented.