| Texto completo | |
| Autor(es): |
Freire, Cesar M.
;
Meneghini, Julio R.
;
Gioria, Rafael S.
;
Assi, Gustavo R. S.
;
Theofilis, V
;
Soria, J
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | INSTABILITY AND CONTROL OF MASSIVELY SEPARATED FLOWS; v. 107, p. 6-pg., 2015-01-01. |
| Resumo | |
The helical strake is a device commonly employed for vortex-induced vibration attenuation or suppression. It works by changing and affecting the flow patterns around a circular cylinder and, thereby, reducing the interaction of the shear layers formed in this massive separated type of flow. In this paper the wake of vortices generated by a bare circular cylinder is compared to the wake generated by a circular cylinder fitted with helical strake with pitch equal to ten cylinder diameters and height equal to 0.2 of the cylinder diameter. Besides the analysis of the measured velocity field, a Koopman decomposition is made and the most energetic modes obtained for each condition are compared. The Reynolds number for the visualizations is Re = 10,000. (AU) | |
| Processo FAPESP: | 10/00053-9 - Vibração induzida por vórtices com dois graus de liberdade e efeito de interferência |
| Beneficiário: | Cesar Monzu Freire |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 13/05792-2 - Estudo do controle de escoamentos massivamente separados estudo de caso: supressores de vibração induzida por vórtices do tipo strakes helicoidal |
| Beneficiário: | Cesar Monzu Freire |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |