• Dr. Seongim Choi
  • Korea Advanced Institute of Science and Technology
  • 261 Durham Hall
  • 4:00 p.m.
  • Faculty Host: Dr. Rakesh Kapania

This talk focuses on the development and application of the state-of-the-art design optimization methodologies in aerospace vehicle design. Through the design applications of both fixed and rotary wing vehicle designs, numerous aspects of design optimization methods are introduced and compared. First, multi-fidelity and multidisciplinary design optimization method for supersonic business jets (SBJ) is introduced. Optimal shape and mission profile of SBJ are sought to reduce sonic boom on the ground while increasing aerodynamic performance. Second, a new design methodology is introduced for helicopter rotor design at unsteady forward flight. Unlike the fixed wing vehicle design, numerous difficulties are associated with the accurate prediction and design of unsteady rotor flows. A time-spectral and adjoint-based analysis and design method is introduced. The time-spectral method is based on the frequency-domain method that reduces the unsteady form of the NS governing equation to the periodic steady state formulation. A powerful adjoint solution method can be effectively integrated into the unsteady design framework for helicopter rotors. The design framework of time-spectral and adjoint-based method can be applied to many areas of the engineering design problems such as wind-turbine blade design and flapping wing MAV design.