Computational study of the vortex path variation with the VG height


Autoria(s): Fernández Gámiz, Unai; Zamorano, G.; Zulueta Guerrero, Ekaitz
Data(s)

09/03/2016

09/03/2016

2014

Resumo

An extensive range of conventional, vane-type, passive vortex generators (VGs) are in use for successful applications of flow separation control. In most cases, the VG height is designed with the same thickness as the local boundary layer at the VG position. However, in some applications, these conventional VGs may produce excess residual drag. The so-called low-profile VGs can reduce the parasitic drag associated to this kind of passive control devices. As suggested by many authors, low-profile VGs can provide enough momentum transfer over a region several times their own height for effective flow-separation control with much lower drag. The main objective of this work is to study the variation of the path and the development of the primary vortex generated by a rectangular VG mounted on a flat plate with five different device heights h = delta, h(1) = 0.8 delta, h(2) = 0.6 delta, h(3) = 0.4 delta and h(4) = 0.2 delta, where delta is the local boundary layer thickness. For this purpose, computational simulations have been carried out at Reynolds number Re = 1350 based on the height of the conventional VG h = 0.25m with the angle of attack of the vane to the oncoming flow beta = 18.5 degrees. The results show that the VG scaling significantly affects the vortex trajectory and the peak vorticity generated by the primary vortex.

Identificador

Science of making torque from wind 2014 (Torque 2014) 524 2014 : (2014) //Article ID 012024

1742-6588

http://hdl.handle.net/10810/17568

10.1088/1742-6596/524/1/012024

Idioma(s)

eng

Publicador

IOP Publishing

Relação

http://iopscience.iop.org/article/10.1088/1742-6596/524/1/012024/meta;jsessionid=D60C046B304F72BF8F5FD3348C38C228.c4.iopscience.cld.iop.org#artAbst

Direitos

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

info:eu-repo/semantics/openAccess

Palavras-Chave #boundary-layers #generators #flow
Tipo

info:eu-repo/semantics/article