visualisation of flamestructure in coflow diffusion flames (COFLOW)

research area: combustion

experiment title:

Visualisation of Flamestructure in Coflow Diffusion Flames

experiment acronym: COFLOW

funding agency: ESA

grant number: AO-98/99-001

performing organization:

Laboratoire de Combustion et de Détonique (LCD), ENSMA - Université de Poitiers, France

prime investigator: Prof. Dr. Pierre Joulain

experiment objective


An infrared camera is used to obtain a temperature field for a thin laminar diffusion flame. The flame is treated as an emitting surface and a global emissivity is determined by calibration with thermocouples. The configuration is that of a porous burner and an oxidizer flow parallel to the surface. This configuration provides a one-dimensional flame surface that minimizes errors due to spatial integration of the emissions. Experiments have been mostly conducted in microgravity. Preliminary results have shown that calibration of an infrared camera is possible by means of thermocouples and video images. Temperatures for the thin flame surface are presented and the limitations and future developments are explained. Although precision is a primary objective, in this particular case it is clear that the quality of the results is limited by the thermocouple measurements. This compromise is necessary to obtain a full temperature field in a short time period, making this approach especially attractive for short-term microgravity facilities.

related publications

  • Lynda Brahmi, Thomas Vietoris, José L. Torero and Pierre Joulain: Estimation of boundary layer diffusion flame temperatures by means of an infrared camera under microgravity conditions. Meas. Sci. Technol. 10, 859–865 (1999)

experimental setup

experiment campaigns

experiment year: 2000
number of drops: 11