Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
A simplified model for the aerodynamic analysis of a small propeller
Submission Author:
Célia Rosolen , SP
Co-Authors:
Kamal Ismail, Célia Rosolen
Presenter: Célia Rosolen
doi://10.26678/ABCM.COBEM2017.COB17-2581
Abstract
The flow through the rotor of a propeller is complex due to the rotor wake interaction. Different methods with more or less simplifications are used to represent the flow field and its interaction with the rotor and how these simplifications can affect the precision of the predicted results and computation time. These methods include momentum theory, blade element theory, lifting line theory, finite volume methods, panel methods, boundary element methods and CFD analysis. Most of these methods consume memory and computational time. The present proposes using a robust and simple method to calculate the aerodynamic characteristics of the propeller with acceptable precision and small computational time and small CPU time of around 0.7s. In this study both the momentum theory and blade element theory are used in home built FORTRAN calculation program. The predicted results are compared with those obtained from the panel method and available experimental results showing acceptable agreement. Further calculations were realized to investigate the effects of chord distribution and local pitch angle on the blade loading, on the torque and the thrust coefficients of the propeller.
Keywords
small propeller, panel method, momentum theory, blade element theory, blade aerodynamics
