Microgravity diffusion flame spread over a thick solid in step-changed low-velocity opposed flows

Microgravity opposed-flow flame spread in polyvinyl chloride tubes

The effects of gravity on opposed-flow flame spread in a confined geometry were investigated experimentally in the 2.2-s drop tower at the NASA Glenn Research Center. Pure oxygen flowed through samples of 0.64-cminner-diameter polyvinyl chloride (PVC) tubing held either horizontally or vertically in a combustion chamber filled with nitrogen. The sample was ignited in normal gravity with a hot w...

Radiation-Driven Flame Spread Over Thermally-Thick Fuels in Quiescent Microgravity Environments

Microgravity experiments on flame spread over thermally-thick fuels were conducted using foam fuels to obtain low density and thermal conductivity, and thus large spread rate (Sf) over thermally-thick fuels compared to dense fuels such as PMMA. This scheme enabled meaningful results to be obtained even in 2.2 second drop tower experiments. It was found that, in contrast conventional understandi...

Creeping Flame Spread along Fuel Cylinders in Forced and Natural Flows and Microgravity

MICHAEL A. DELICHATSIOS,1 ROBERT A. ALTENKIRCH,2 MATTHEW F. BUNDY,3 SUBRATA BHATTACHARJEE,4 LIN TANG2 and KURT SACKSTEDER5 Fire Science and Technology Laboratory CSIRO/DBCE Fire Safety Engineering Division North Ryde, NSW Australia 1670 NSF Engineering Research Center Department of Mechanical Engineering Mississippi State University Mississippi State, MS 39762, USA National Institute of Standar...

Upward Flame Spread Over Discrete Fuels

Title of Document: Upward Flame Spread Over Discrete Fuels Colin H. Miller, Master of Science, 2014 Directed By: Dr. Michael J. Gollner, Assistant Professor, Department of Fire Protection Engineering Upward flame spread over discrete fuels has been analyzed through experimental research on vertical arrays of alternating lengths of PMMA and insulation. By manipulating the lengths of the PMMA fue...

A Two -Step Modification toward Implementing Compressible Source Terms in Low Compressible Flows