Utilization of streamwise vortices to enhance mixing in supersonic 3D flows - Numerical approach
Abstract
As one of the effective ways to enhance mixing of supersonic flows without increasing the loss, the utilization of the streamwise, i.e., axial vortices produced by the lobed splitter plate with wavy trailing edge has been proposed. The paper presents numerical solutions of the Reynolds-averaged Navier-Stokes equations to show the production of axial vortices and to discuss the effects of parameters on the overall flow and temperature fields. It is shown that the lobed plate gives thicker shear-layer than the flat plate does. In addition, the convoluted shear-layer at the downstream position of the lobed mixer plate is susceptible to breaking down and gives higher mixing efficiency. Although the streamwise vortices dissipate at downstream locations, the maximum vorticity in the vortex cell appears unchanged, and the vortex cell structure remains unaltered even at far downstream locations. Thus, the generated streamwise vortices are expected to realize the efficient mixing with the least loss in the shear-layer.
- Publication:
-
11th International Symposium on Air Breathing Engines
- Pub Date:
- 1993
- Bibcode:
- 1993abe..conf.1182Y
- Keywords:
-
- Computational Fluid Dynamics;
- Mixing Layers (Fluids);
- Stream Functions (Fluids);
- Supersonic Combustion Ramjet Engines;
- Supersonic Flow;
- Three Dimensional Flow;
- Vortices;
- Navier-Stokes Equation;
- Shear Layers;
- Shock Wave Interaction;
- Temperature Distribution;
- Trailing Edges;
- Fluid Mechanics and Heat Transfer