1. Abstract Gas turbine engines for aerospace applications have evolved dramatically over the last 50 years through the constant pursuit for better specific fuel consumption, higher thrust-to-weight ratio, lower noise and emissions all while maintaining reliability and affordability. This paper addresses one facet of this inter-disciplinary optimization problem – optimal design of a turbine bla...

An efficient method for scattering Genetic Algorithm (GA) individuals in the design space is proposed to accelerate airfoil shape optimization. The method used here is based on the variation of the mutation rate for each gene of the chromosomes by taking feedback from the current population. An adaptive method for airfoil shape parameterization is also applied and its impact on the optimum desi...

Orthogonal modes are an effective method for aerodynamic shape optimization due to their excellent design space compactness; however, all existing methods generated from a database of representative geometry. Moreover, application high-fidelity spaces is not possible because high-frequency components insufficiently bounded, leading nonsmooth and oscillatory geometries. In this work, new generic...

In this paper multi-objective genetic algorithms were employed for Pareto approach optimization of turboprop engines. The considered objective functions are used to maximize the specific thrust, propulsive efficiency, thermal efficiency, propeller efficiency and minimize the thrust specific fuel consumption. These objectives are usually conflicting with each other. The design variables consist ...

This article presents the area of aerodynamic design optimization, and emphasizes the topics of the most intensive current research within this area. Various approaches for shape parameterization, optimization algorithms and metamodelling are briefly explained. A real-world application is presented.

A parallel variable-complexity modeling approach, permitting the eecient use of emerging parallel computing in multidisciplinary optimization (MDO) technology, is presented for the particular instance of High Speed Civil Transport (HSCT) design. Simple analyses are used to limit the approximation domain in the design space. Points are selected within the approximation domain by a genetic algori...

Introduction There is a worldwide demand for efficient and robust software which implements aerodynamic optimization. This request is explained by the pivotal role of advanced aerodynamic design in the process of reducing costs and thus improving competetiveness of aircraft manufacturing. A conventional (“direct”) approach to the constrained design of aerodynamic shapes is oriented to the “tria...

OPTIMAL SHAPE DESIGN OF AERODYNAMIC CONFIGURATIONS: A NEWTON-KRYLOV APPROACH Marian Nemec Doctor of Philosophy Graduate Department of Aerospace Science and Engineering University of Toronto 2003 Optimal shape design of aerodynamic configurations is a challenging problem due to the nonlinear effects of complex flow features such as shock waves, boundary layers, ...

A procedure based on MATLAB combined with ANSYS is presented and utilized for the aerodynamic and structural integrated optimization design of Horizontal-Axis Wind Turbine (HAWT) blades. Three modules are used for this purpose: an aerodynamic analysis module using the Blade Element Momentum (BEM) theory, a structural analysis module employing the Finite Element Method (FEM) and a multi-objectiv...