Small-width wall-attached Coandǎ jets for flow control
Oussama El Mokkadem,
Xintong Chen,
Charlene Phan,
Jérôme Delva,
Pierric Joseph,
Antoine Dazin,
Francesco Romanò
Affiliations
Oussama El Mokkadem
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
Xintong Chen
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
Charlene Phan
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
Jérôme Delva
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
Pierric Joseph
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
Antoine Dazin
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
UMR 9014-LMFL-Laboratoire de Mécanique des Fluides de Lille, Kampé de Fériet, Univ. Lille, CNRS, ONERA, Arts et Métiers Institute of Technology, Centrale Lille, F-59000 Lille, France
The flow dynamics of small-width wall-attached jets generated by a Coand-effect nozzle is investigated by unsteady Reynolds-averaged Navier–Stokes simulations. The data are validated by comparison with hot-wire velocity measurements performed on the same flow configurations. The jets exhibit a complex topology strongly influenced not only by the spanwise vorticity (as usually observed in wall jets) but also by a vorticity component normal to the wall and induced by the shear layer developing on the jet sides. This results in an original U-shaped jet whose characteristics are studied in detail for three different mass flow rates. The robustness of the flow topology on a larger range of injected mass flow rates is finally presented and discussed in terms of the injected momentum near the wall. The resulting flow profiles point out that our injector is expected to be a promising candidate for active flow control in gas-turbine compressors for aeronautical and energy applications.
