Game theory and its particular Nash games are gaining importance in multi-objective optimization in engineering problems over the past decade. Among ongoing advances in optimization methods and tools, many applications including mathematical modeling with constraints in different areas remain challenges in industrial design environments. This paper describes a constraint handling algorithm to e...

Shape optimization aims to optimize an objective function by changing the shape of 10 the computational domain. In recent years, shape optimization has received consid11 erable attentions. On the theoretical side there are several publications dealing with 12 the existence of solution and the sensitivity analysis of the problem; see e.g., [6] and 13 references therein. On the practical side, op...

This paper discusses a multidisciplinary design optimization of a three-dimensional supersonic biplane. First, methods to evaluate the performance of a supersonic biplane are described. The methods include modified oblique shock wave equations, a modified Method of Characteristics, and the reference enthalpy method. Second, validations of the present methods are described. Finally, a multidisci...

In order to reduce the dependence on fossil fuels, concept of distributed electric propulsion (DEP) has been introduced. At present, there are a few studies small engines DEP vertical take-off and landing (VTOL) UAVs. According design requirements VTOL UAV ducted fans, aerodynamic fan is carried out in this paper. Firstly, initial model established by referring theoretical derivations. Then, Be...

Application of computational fluid dynamics to the optimization of aeroshell shapes usually entails high computational cost. Many converged solutions are required to generate gradients and optimize a shape with respect to very few design variables. The benefits of high-fidelity aerodynamic analysis can be reaped early in the design cycle with less computational cost if the traditional direct op...

An efficient and high-fidelity design approach is proposed by combining global and local optimization methods for wing planform and surface design. For enhanced design results, aerodynamic shape optimization process is carried out via 2-stage with different optimization strategy. In the first stage, global optimization techniques are applied to planform design with a few geometric design variab...

GAs have been successfully used in an aerodynamic shape design optimization. Time efficiency issues related to the evaluation of a fitness are becoming a critical point as large calculations are needed. In this paper two efficient methods are applied to the original GAs to save computational time. Firstly, parallelized GA is used for a single disciplinary optimization to investigate the scalabi...

The shortening of the design cycle and the increase of the performance are nowadays the main challenges in aerodynamic design. The use of evolutionary algorithms (EAs) seems to be appropriate in a preliminary phase, due to their ability to broadly explore the design space and obtain global optima. Evolutionary algorithms have been hybridized with metamodels (or surrogate models) in several work...

Optimal aerodynamic shape design aims at finding the minimum of a functional by controlling the PDE modeling the flow using surface deformation techniques. As a solution to the enormous computational resources required for classical shape optimization of functionals of aerodynamic interest, probably the best strategy is to use in a systematic way, methods inspired in control theory. One of the ...