Estudo e otimização de uma asa sob efeito de hélice na configuração tractor para redução de arrasto

• Ano de defesa: 2017
• Autor(a) principal: Leandro Neves Pedreiro
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: CFD; Hélice; Otimização de asa; Integração propulsiva; Aviões Asas; Hélices de avião; Engenharia mecânica
• Link de acesso: http://hdl.handle.net/1843/BUOS-ARVF7R

This thesis presents a study of propeller effects on drag of a tractor wing and a wing form optimization proposal of a representative regional turboprop wing. In this study, the propeller is modeled as a disk with infinitesimal thickness and is applied the Blade Element Method with tip loss and rotation effects correction. The propeller model is validatedcomparing with propeller experimental results available in literature. The propeller effects over the wings and the drag variation due to wing form modifications are obtained with RANS simulations. Initially, a parametric study is made with a rectangular wing in order to understand the effects of thickness and twist insulated modification on wing drag for representative flight conditions of cruise and climb. The results show the thickness reduction decreases the wing form drag and the twist modifications varies the wing induced drag, modifying the wing Oswald factor. Then, a study is made to propose a turboprop aircraft wing optimization based on simultaneously thickness and twist modificationson the wing area immersed in the propeller slipstream. Among the best analyzed wings, the wing drag reduction is about 3.2 dc in cruise condition. With combined effects of reduction drag in climb and cruise conditions of a typical mission profile, the wing with best results has thickness reduction and opposite incidence angles in the twist region. This wing implies increase of 33% in aircraft range or 46% in the payload regarding the original configuration. This present work shows the value of considering the tractor propeller effectin the aerodynamic design of surfaces near to it.