Experiments were conducted on flat, vertical samples of polymethylmethacrylate burning in ambient atmospheres having nonuniform vertical distribution of temperature and oxygen mass fraction, simulating wall fire in a room. The stratification of ambient atmosphere was determined by measuring the temperature and oxygen mass fraction variation with the height, and their effect on burning of the wall was determined by measuring the local mass loss rate of the wall as a function of the distance from the leading edge. Measurements were compared with a previously developed model and available data on burning rates in uniform atmosphere. It was clearly seen that the upstream (lower-layer) conditions have a strong effect on the burning of the entire wall via convection of oxygen, and the radiation form the upper layer also affects the burning rates significantly.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Nuclear Energy and Engineering
- Aerospace Engineering
- Mechanical Engineering
- Fluid Flow and Transfer Processes