Abstract
The performance of a zero-net-mass-flux Jet and Vortex Actuator (JaVA) was numerically investigated in a two-dimensional-cross-flow flat-plate laminar boundary layer. The JaVA is an active flow control device that can be used for flow separation control and thus can delay/prevent boundary layer separation. In this study, an unsteady, incompressible flow solver has been used to study the flow fields generated by a JaVA in a water channel. Detailed quantitative information about the performance of the JaVA on a flat-plate boundary layer is obtained. JaVA-induced boundary-layer profiles are clearly 'fuller' at the wall and hence more resistant to flow separation. The 'positive' effects of the JaVA with different operating regimes on various boundary-layer flow characteristics such as displacement thickness, shape factor and the friction coefficient are presented in this study. Selecting the appropriate governing parameters in conjunction with cross-flow properties, the velocity profile can be tuned in a boundary layer to delay or prevent separation.
| Original language | English |
|---|---|
| Pages (from-to) | 42-59 |
| Number of pages | 18 |
| Journal | European Journal of Mechanics, B/Fluids |
| Volume | 44 |
| DOIs | |
| Publication status | Published - 2014 |
Funding
We gratefully acknowledge the financial support of the Scientific and Technological Research Council of Turkey (TÜBİTAK) and the International Bureau of the Federal Ministry of Education and Research (BMBF), Germany through the project Development and Testing of a Jet and Vortex Actuator (JaVA) for Active Flow Control, Nr. 107M644 and TUR 07/006 , respectively.
| Funders | Funder number |
|---|---|
| Bundesministerium für Bildung und Forschung | |
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu |
Keywords
- Active flow control
- Boundary layer
- Computational fluid dynamics
- Dynamic mesh
- Jet and vortex actuator
- Zero-net-mass-flux