Secondary flow, turbulent diffusion and mixing in axial-flow compressors
Abstract
The relative importance of convection by secondary flows and diffusion by turbulence as mechanisms responsible for mixing in multistage, axial-flow compressors has been investigated by using the ethylene tracer-gas technique and hot wire anemometry. The tests were conducted at two loading levels in a large, low-speed, four-stage compressor. The experimental results show that considerable cross-passage and spanwise fluid motion can occur and that both secondary flow and turbulent diffusion can play important roles in the mixing process, depending upon location in the compressor and loading level.
- Publication:
-
32nd International Gas Turbine Conference and Exhibition
- Pub Date:
- May 1987
- Bibcode:
- 1987gatu.confQ....W
- Keywords:
-
- Airfoils;
- Axial Flow;
- Hot-Wire Anemometers;
- Secondary Flow;
- Turbocompressors;
- Turbulent Diffusion;
- Boundary Layers;
- Computational Fluid Dynamics;
- Perturbation Theory;
- Radial Velocity;
- Turbulent Mixing;
- Wall Flow;
- Fluid Mechanics and Heat Transfer