Experimental facilities, raw and processed data
Flame spread over thin PMMA sheets (thickness: 100, 200, 300, and 400 μm) in an opposed flow configuration at 21% and 17% O2 level. Opposing flow ranging from 20 cm/s down to zero. For the first time, we have an experiment where we have captured the entire range, radiative quenching through blow-off extinction, using a single fuel.
Transition from 1-g downward to microgravity (quiescent) condition is studied with fuel thickness and oxygen level as parameters.
Downward spread in 1-g quiescent environment under ambient conditions over PMMA and cellulose. Content: Images (top view) and flame spread rate for downward spread for different fuel thicknesses, use of flame anlyzer to obtain the instantaneous flame spread rate, radiometer measurements, and thin and thick transition for PMMMA.
PMMA
Opposed-flow flame spread in a vertical combustion tunnel, which we call the SDSU combustion tunnel. Content: Images (top view) and flame spread rate for opposed-flow flame spread for different fuel thicknesses, effect of opposing flow velocity and boundary layer development length on the flame spread rate, and correlating the blow-off extinction velocity and the development distance through an effective extinction velocity.
PMMA
By moving the sample through this 8 m tall chamber, a variety of flow configuration, including opposed and concurrent flows at different pressure and oxygen level, can be created.
PMMA