Results 91 to 100 of about 69,093 (209)

Optimal Passive Aerodynamic Control Design for Mitigating Flutter in Long-Span Bridges

Journal of Applied Science and Engineering
A wide range of studies have focused on improving the aerodynamic stability of long-span bridges by raising their critical flutter wind speed. There are two main approaches to enhancing aerodynamic stability: mechanical and aerodynamic methods.
Hong-Son Nguyen, Van-Quyen Nguyen, Ngoc-An Tran, Phan-Anh Nguyen, Ngoc-Dung Bui   +4 more
doaj   +1 more source

Integrated Surrogate Model-Based Approach for Aerodynamic Design Optimization of Three-Stage Axial Compressor in Gas Turbine Applications

Energies
The refined aerodynamic design optimization of multistage compressors is a typical high-dimensional and expensive optimization problem. This study proposes an integrated surrogate model-assisted evolutionary algorithm combined with a Directly Manipulated
Jinxin Cheng, Bin Li, Xiancheng Song, Xinfang Ji, Yong Zhang, Jiang Chen, Hang Xiang   +6 more
doaj   +1 more source

Multi-disciplinary robust design of variable speed wind turbines [PDF]

, 2011
This paper addresses the preliminary robust multi-disciplinary design of small wind turbines. The turbine to be designed is assumed to be connected to the grid by means of power electronic converters.
Campobasso, Michele Sergio, Dellantonio, Michele, Minisci, Edmondo, Montecucco, Andrea, Vasile, Massimiliano   +4 more
core  

Optimum design of high speed prop rotors including the coupling of performance, aeroelastic stability and structures [PDF]

An optimization procedure is developed for the design of high speed prop-rotors to be used in civil tiltrotor applications. The goal is to couple aerodynamic performance, aeroelastic stability, and structural design requirements inside a closed-loop ...
Chattopadhyay, Aditi, Madden, John F., III, Mccarthy, Thomas R.   +2 more
core   +1 more source

Investigation on Aerodynamics of Super–Effective Car for Drag Reduction. [PDF]

, 2016
This paper focuses on shape optimization of a car body to be used in Shell Eco Marathon race. The work consists of the review of aerodynamic performance for currently used shapes, definition of the design constraints for the vehicle and recommendations ...
Cieśliński, Artur, Prym, Wojciech, Stajuda, Mateusz, Witkowski, Dariusz   +3 more
core  

Airfoil optimization with efficient gradient calculations [PDF]

The viscous airfoil design analysis code XFOIL was extended to allow optimization using conformal mapping coefficients as design variables. The optimization technique used was the Steepest Descent method applied to a Penalty Function.
Sorensen, Thomas
core   +1 more source

Polynomial Response Surface Approximations for the Multidisciplinary Design Optimization of a High Speed Civil Transport [PDF]

, 2001
Surrogate functions have become an important tool in multidisciplinary design optimization to deal with noisy functions, high computational cost, and the practical difficulty of integrating legacy disciplinary computer codes.
Grossman, B., Hosder, S., Kim, H., Mason, W.H., Watson, L.T.   +4 more
core   +1 more source

Aerodynamic Characteristics Optimization Design of the HALE Joined-Wing Configuration UAV

International Journal of Aerospace Engineering
This study investigates the factors influencing the aerodynamic performance enhancement of the rear wing of the joined-wing configuration UAVs by analyzing the flow field structure and flow mechanisms before and after airfoil optimization ...
Junlei Sun, Zhou Zhou, null TserendondogTengis, Jian Zhang   +3 more
doaj   +1 more source

The art of spacecraft design: A multidisciplinary challenge [PDF]

Actual design turn-around time has become shorter due to the use of optimization techniques which have been introduced into the design process. It seems that what, how and when to use these optimization techniques may be the key factor for future ...
Abdi, F., Austel, L., Ide, H., Levine, M.   +3 more
core   +1 more source

Optimum Design of High Speed Prop-Rotors [PDF]

The objective of this research is to develop optimization procedures to provide design trends in high speed prop-rotors. The necessary disciplinary couplings are all considered within a closed loop optimization process.
Chattopadhyay, Aditi
core   +1 more source