Entrainment in the near field of a fire plume
Abstract
The flame geometry and entrainment rates of 10-80 kW methane diffusion flames stabilized on 0.1, 0.19 and 0.5 m. dia. porous bed burners are described. Flame heights based on high speed photographs are presented and correlations are developed for several characteristics of the flame geometry. The entrainment process in a fire plume was found to occur in three distinct modes: a laminar flame, in the zone close to the burner surface; a turbulent flame, at larger heights; and a turbulent plume, in the region above the visible flame. A model based on these three processes is proposed and compared with entrainment measurements.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- November 1981
- Bibcode:
- 1981STIN...8226517Z
- Keywords:
-
- Combustion Physics;
- Entrainment;
- Fires;
- Flames;
- Near Fields;
- Plumes;
- Burners;
- High Speed Cameras;
- Laminar Flow;
- Mathematical Models;
- Methane;
- Porosity;
- Turbulent Flow;
- Engineering (General)