Trabajo de tesis Maestría en Ciencias, Especialidad en Sistemas de Manufactura por Waldo Arcos Medina.
- Tesis en biblioteca del ITESM
- León, Noel; Uresti, Eduardo; Arcos, Waldo Jesús;FAN SHAPE OPTIMIZATION USING CFD AND GENETIC ALGORITHMS FOR INCREASING THE EFFICIENCY OF ELECTRIC MOTORS, INTERNATIONAL JOURNAL OF COMPUTER APPLICATIONS IN TECHNOLOGY, 2007
ABSTRACT
The purpose of this is paper is to introduce a new way to increase the efficiency electric motor through shape optimization using Genetic Algorithms. As we know, the electric motor efficiency represents the effectiveness with which the motor converts electrical energy into mechanical energy and the watts losses are converted into heat which is dissipated by the motor frame aided by internal or external fans. So, a better cooling system in the motor adds up to better efficiency. In recent years, a number of attempts to improve the motor efficiency have been achieved without compromising motor performance but at higher cost. Algorithms genetics will introduce changes on the fan shape and the evaluation of fluid dynamic proprieties of these new shapes will be evaluated in CFD programs.
Keywords: Shape optimization, genetic algorithms, Shape parametrization, CFD. - Fan:
- Fan by one blade:
- Encoding one blade by transversal points:
- Blade evaluation by CFD software:
Trabajo de tesis Maestría en Ciencias, Especialidad en Sistemas de Manufactura por César Villarreal (Diciembre/2008)
Executive summary
This Thesis presents a methodology for an automated optimization of the rotor of a Savonius vertical axis wind turbine. This optimization was performed using an automated process integrated in a multidisciplinary design optimization software. In it, a genetic algorithm was in charge of the optimization of the selected variables. In this case the variables were the rotor profile shape, diameter and tip speed ratio of the wind turbine. This rotor's variations were evaluated by calculating its power coefficient (CP) using computational fluid dynamics (CFD). There were performed three optimizations. The first was single objective in order to maximize the CP, this was accomplished by performing modifications to the shape of the rotor profile. The second was multi objective in order to maximize the CP and minimize the difference of it in the unsteady CFD analysis (CPdif). The previous was achieved by making variations to the rotor's shape profile, size and TSR. The third optimization was singleobjective (maximizing the CP) and it involved performing the same variations as the second optimization.
Keywords: Vertical axis wind turbine, Savonius, shape optimization, power coefficient, computational fluid dynamics, genetic algorithm.
- Design example(Dynamic Pressure)
- Design example(Static Pressure)
- Design example(Turbulence Intensity)
Trabajo de tesis Maestría en Ciencias, Especialidad en Sistemas Inteligentes por Abel Chávez (Mayo/2009).
En el presente trabajo se presenta una metodología para una optimización automatizada de un aspa de un ventilador de flujo tubo-axial. La evaluación del desempeño de las distintas aspas se hizo dentro de un software libre para el modelado de fluidos conocido como \textit{OpenFOAM}. El algoritmo evolutivo encargado de la optimización fue programado en un lenguaje de programación conocido como \textit{Python}. El algoritmo utilizado en optimización evolutiva es una variación del algoritmo conocido como \textit{Genitor}. La función objetivo o parámetro a minimizar fue la velocidad promedio de salida en uno de los extremos del túnel donde se encuentra montado el ventilador. Dicho promedio se obtiene al variar la velocidad de rotación del ventilador, en total fueron siete velocidades distintas las que se promediaron.
- One blade Fan in CAD:
- Encoding:
- GA:
- Best design fan:
Trabajo de tesis Maestría en Ciencias, Especialidad en Sistemas de Manufactura por José María Cueva De León.
Trabajo de tesis Maestría en Ciencias, Especialidad en Sistemas de Manufactura por Erik Sewe, en progreso.