Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Design Performance Optimization of Scaled Rotary Blades for Additive Manufacturing
Submission Author:
Giulia Derneka Maccarone , SP , Brazil
Co-Authors:
Giulia Derneka Maccarone, Daniel Sampaio Souza, Marcelo Jorge Filho, Carlos Pagani, Murilo Sartorato
Presenter: Giulia Derneka Maccarone
doi://10.26678/ABCM.COBEM2023.COB2023-1885
Abstract
This study reports on the methodology and results of an ongoing study focused on the parametric optimization of both aerodynamic and structural performance of small scale rotary wings operating at low Reynold hovering flight. The rotary wings engineering project relies on the integration between an aerodynamic numerical model and manufacturing processes based on additive manufacturing techniques. In the first step, a numerical method known as Blade Element Momentum Theory (BEMT) will be applied to simulate the induced flow field, aerodynamic loading and rotor performance within a range of design parameters and operational conditions characteristics of unmanned aerial vehicles (UAV). The non-dimensionalized lift and drag aerodynamic coefficients, required to apply the method BEM at low Reynolds regimes, are obtained for each selected airfoil geometry by using the XFOIL software. The rotor aerodynamic performance is quantified based on the rotor solidity, airfoil geometry, wing taper ratio, thickness, camber and spanwise twist ratio. The manufacturing process should enable the comparison of performances among additive manufacturing techniques in achieving the aerodynamic and structural requirements for small scale rotary blades with optimal geometries. Confidence intervals will be set to represent the dimensional uncertainties resulting from each manufacturing process based on optimized geometries. Geometry constraints due to structural integrity limits will be investigated. Manufacturing process quality, dimensional tolerance and mechanical properties will be used to qualify the scaled blade design process. The optimal blade design will be applied to the development of a small scaled rotary blade mechanism for bench tests aiming at both passive and active mechanical vibration control, rotor aerodynamic performance, acoustic emission and aeroelastic stability, among others. This research is motivated by the increasing tendency in the use of small vehicles based on fixed or rotary wings for civilian, agricultural and military applications, and justified by the necessity of driving basic and applied researches towards technological innovations, leading to new generations of small scale aircrafts able to overcome the current technical limitations and to attend the increasingly environmental requirements.
Keywords
rotary wings, Aerodynamic performance, scaled rotors design, Parametric Optimization, Additive manufacturing
