Experimental research on 3D turbulent gas-particle flows in a combustor of CO-flow jet with large velocity difference
Abstract
The time-averaged and rms fluctuation velocities of gas and particle phases and particle mass flux distributions were measured in a combustor of coflow jets with large velocity differences. The results show a large velocity slip between gas and particle phases. The gas-phase flow has a strong reverse flow in the near-axial region, while particles keep their forward motion almost everywhere, even in the strongly reverse-flow region. The particle mass flux distributions measured have their maximum values in the near-axial reverse flow region. The presence of high-velocity jets remarkably enhances particle mixing. All these facts reveal the mechanism of flame stabilization and combustion intensification in the combustor of coflow jets with large velocity difference. The experimentally observed four peaks in the gas turbulence intensity demonstrate that the turbulence is due to a large velocity gradient caused by sudden expansion and high-velocity jets.
- Publication:
-
Journal of Aerospace Power
- Pub Date:
- January 1989
- Bibcode:
- 1989JAerP...4...33L
- Keywords:
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- Combustion Chambers;
- Gas Dynamics;
- Three Dimensional Flow;
- Turbulent Jets;
- Two Phase Flow;
- Flow Velocity;
- Laser Doppler Velocimeters;
- Particle Motion;
- Fluid Mechanics and Heat Transfer