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Toward a Microgravity Research Strategy (1992) / Chapter Skim
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Appendix B: Combustion Science
Pages 26-30

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From page 26...
... Other journals in the fields of fluid REPORT MENU mechanics, heat and mass transfer, chemical physics, thermophysics, propulsion NOTICE and power, spectroscopy, applied mathematics, and environmental science MEMBERSHIP regularly contain articles relating to combustion. Several international research SUMMARY conferences are dedicated to combustion topics.
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From page 27...
... Control of the acceleration environment offers the prospect of scientific breakthroughs in several areas of combustion science. MAJOR RESEARCH ACCOMPLISHMENTS Generally, the acceleration environment is found to have not only observable but also profound effects on material flammability characteristics, flame spread rates, and burning rates.
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From page 28...
... Cellular structures have been found experimentally at reduced gravity levels for lean hydrogen-air mixtures. Experiments indicate that jet diffusion flames become larger, more spherical, and sootier as gravity is reduced, but the mechanism is not yet fully understood.7 Preliminary data on spherically symmetric fuel droplet vaporization and burning support the theoretical prediction of the importance of certain unsteady effects.8 Buoyancy tends to destroy spherical symmetry, making the microgravity environment particularly appealing.
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From page 29...
... A series of experiments on flame propagation through gaseous combustible mixtures is needed in order to evaluate the relative effects of various mechanisms on flammability limits. The consequences of chemical kinetics, radiative heat losses, fluid dynamical strain, Lewis number variation, and buoyancy should be determined, The consequences of these same parameters on flame front instabilities and cellular flame formation are also of interest.
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From page 30...
... 1987. "Effects of Buoyancy on Gas Jet Diffusion Flames, Experiment and Theory." Acta Astronautica 13:681-688.
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Key Terms

  • flame spread
  • combustion science
  • combustion institute
  • fire safety
  • flammability limits

  • combustion topics
  • flame propagation
  • jet diffusion
  • combustion research
  • combustion processes

  • microgravity environment
  • solid fuels
  • thin solid
  • diffusion flames
  • gaseous combustible

  • spacecraft fire
  • oxygen concentration
  • reduced gravity
  • environment offers
  • acceleration environment

  • combustible mixtures
  • microgravity combustion
  • spray combustion
  • address combustion
  • combustion researchers

  • combustion receives
  • flame spreading
  • flame calls
  • cellular flame
  • flame front


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