Enhanced Turbulent Outer Peak using uniform Micro-Blowing Technique EuHIT Funded Project

Team

Christophe Cuvier
Laboratoire de Mécanique de Lille, Villeneuve d'Ascq, France
Christoph Egbers
BTU Cottbus-Senftenberg, Cottbus, Germany
Jean-Marc Foucaut
Ecole Centrale de Lille, Villeneuve d'Ascq, France
Sebastian Merbold
Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany
Vasyl Motuz
BTU Cottbus-Senftenberg, Cottbus, Germany

Overview

Research Infrastructure
LMFL Boundary Layer Wind Tunnel, France
Facilities used
LMFL Boundary Layer Wind Tunnel (LML)
Project leader
Gazi Hasanuzzaman
Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany

Abstract

We propose to investigate the interaction between turbulent boundary layer and blowing air from uniformly distributed perforated wall (Micro-Blowing Technique-MBT) at LML boundary layer wind tunnel, National Center for Scientific Research, Lille, France. Previous investigation from Smits et al 2011 [1], has showed that the control of wall bounded turbulent flow can be achieved through the control of large-scale structures and very large-scale structures which are vividly termed as Superstructures. Measurements will be taken for the range of external flow Reynolds number from 8,000 to 20,000. For different amplitude of blowing air ratio between 0.1 to 0.3 percent in wall normal direction, boundary layer flow will be varied at different Reynolds number regime. Mean flow statistics is strongly enhanced due to MBT application, to investigate the enhanced peak (Enhanced Turbulent Outer Peak-ETOP) generation in turbulent boundary layer, experimental data from the complete flow field is intended to measure in this campaign. The enhancement process will be scaled using different blowing amplitude. Particle Image Velocimetry (PIV) measurements will be carried out at a constant stream-wise location where the flow is in fully developed turbulent state. Large boundary layer thickness at LML wind tunnel is particularly feasible to investigate such complex interaction with the leverage of large spatial development of the vortices in outer region of boundary layer.

References

[1] Smits, A. J., McKeon, B.J. and Marusic I., 2011: “High–Reynolds Number Wall Turbulence”, Annual. Rev. Fluid Mech, Vol-43, pp.353–75.