Modification of turbulent flowfield by an oblique premixed hydrogen-air flame
Abstract
In this paper, results concerning a flowfield modified by a flame front are presented, including the mean temperature and concentration field, the mean values, and the fluctuations and correlations of velocity components (lased Doppler velocimetry (LDV) measurements). The combustion apparatus allows us to distinguish several different reasons for velocity change such as the wake of the flame stabilizer; turbulence generation associated with the shear or the mean pressure gradient; and direct turbulence combustion interaction. Analysis of the results shows a typical loss of turbulent isotropy in the flame on the part of the longitudinal velocity component. A strong increase in the longitudinal component of velocity fluctuation is related to the mean pressure gradient. The deflection of the mean streamlines is demonstrated and interesting results concerning the gradient transport assumption are also obtained.
- Publication:
-
Flames, Lasers, and Reactive Systems
- Pub Date:
- 1983
- Bibcode:
- 1983flrs.rept..147T
- Keywords:
-
- Flame Propagation;
- Flow Distribution;
- Fuel-Air Ratio;
- Hydrogen Fuels;
- Premixed Flames;
- Turbulent Flow;
- Bias;
- Flame Stability;
- Flame Temperature;
- Flow Velocity;
- Laser Doppler Velocimeters;
- Pressure Gradients;
- Fluid Mechanics and Heat Transfer