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COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Görtler instability study on the pressure surface of a turbine blade
Submission Author:
Larissa Marques , SP , Brazil
Co-Authors:
Larissa Marques, Josuel Kruppa Rogenski, Leandro Franco de Souza
Presenter: Larissa Marques
doi://10.26678/ABCM.COBEM2017.COB17-1313
Abstract
High-order, pseudo-spectral numerical code (Hope) is used to investigate the influence of the spanwise wavelength variations on the development of Görtler vortices considering a surface with curvature of variable radius. Due to nonlinearities the effects caused by these vortices distort the boundary layer structure by modifying the streamwise velocity component in both spanwise and normal to the wall directions. The geometry considered in this study was adapted from the turbine blade geometry used in an experimental work present in the literature. Results show that the size of the vortical structures is an important parameter on transition process.
Keywords
Görtler vortices, spanwise wavelength, turbine blade, curvature variation, direct numerical simulation
