Abstract
The fundamental principles of combustion mechanisms are of great interest to scientists and engineers. Contemporary key issues are the reduction of fuel consumption, the reduction of pollutant emissions and fire safety. The launching of space craft relies exclusively on combustion engines and manned spaceflight systems are subject to stringent fire safety requirements. This paper shows that the science of combustion can derive important benefits from experiments under microgravity conditions.
In the first section it is argued that combustion processes are in the main driven by physical processes, such as mass and heat transport, as much as by the chemical ones. It is noted that combusting flows are characterized by very large temperature gradients in the gas phase which induce significant “mean buoyancy” effects under gravity conditions, and also by a “fluctuating buoyancy” when a flame is turbulent.
In the second section some of the limitations of the present understanding of combustion processes are reviewed. The relevancy of conducting experiments with negligible natural convection is then discussed. It is concluded that the most valuable means for reducing natural convection is to use reduced gravity conditions.
The third section is devoted to some of the applications of microgravity conditions in the combustion field. Two typical examples are presented to illustrate these applications: single fuel droplet burning and flame spread along a solid surface. Results of relevant experiments are presented which show the feasibility of combustion tests using microgravity conditions and the advantages of eliminating natural convection for conducting well-defined model experiments.
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References
Berlad A.L., Microgravity Science and Applications, Chapter 12: Combustion studies in microgravity — Report on a workshop held on December 3–4, 1984 in Pasadera, Cal., National Academy Press, Washington DC, 1986
Cochran T.H. and Summerfield M., Combustion experments in a zero-gravity laboratory, Progress in Aeronautics and Astronautics, 73, 1981
Cochran T.H., Overview study of combustion experiments in a space laboratory, Progress in Aeronautics and Astronautics, 73, 1981
De Witt R.L., Combustion experimentation aboard the space transportation system, Progress in Aeronautics and Astronautics, 73, 1981
Altenkirch R.A. et al., Definition of experiments requirements for a spacelab combustion facility, USRA Report on NASA contract NAS-3–22651 (1982)
Berlad A.L., Fundamental combustion experiments in microgravity, 4th European Symposium on Materials Science under Microgravity, Madrid (1983)
Summerfield M., Scientific combustion research in a microgravity environment, 33rd IAF Congress, Paris (1982)
Kumagai S., Combustion experiments under microgravity, 4th European Symposium on Materials Science under Microgravity, Madrid (1983)
Kumagai S., Survey of research on gravitational effects on combustion, Combustion Institute (1977)
Kumagai S. and Isoda H., Combustion of fuel droplets in a falling chamber, 6th International Symposium on Combustion (1957)
Kumagai S. and Isoda H., New aspects of droplet combustion, 7th International Symposium on Combustion (1958)
Kumagai S., Sakai T., Okajima S., Combustion of free fuel droplets in a freely falling chamber, 13th International Symposium on Combustion (1971)
Okajima S. and Kumagai S., Further investigations of combustion of free droplets in a freely falling chamber including moving droplets, 15th International Symposium on Combustion (1974)
Okajima S., Abe K., Yamaguchi S., Combustion of fuel droplets under augmented gravity, 16th International Symposium on Combustion (1976)
Okajima S., Kumagai S., Experimental studies on combustion of fuel droplets in flowing air under zero and high gravity conditions, 19th International Symposium on Combustion (1983)
Williams F.A., Droplet burning at zero-gravity, NASA CR 159531 (1980)
Williams F.A., Droplet burning, Progress in Astronautincs and Aeronautics, 73, 1981
Williams F.A., Studies of experiments on droplet burning at reduced gravity, 4th European Symposium on Materials Science under Microgravity, Madrid (1983)
Willimas F. A., Ignition and burning of single liquid droplets, 35th IAF Congress (1984)
Okajima S., Karno M., Combustion of emulsified fuel droplets under microgravity, 35th IAF Congress (1984)
Dordain J.J., Droplet combustion under microgravity, Rapport ESA MAT(83)2, 1983
Wang C.H., Law C.K., Combustion and micro-explosion of freely falling multicomponent droplets, 9th International Colloquium on Dynamics of Explosions and Reactive Systems, Poitiers (1983)
Altenkirch R.A., Microgravity Science and Applications, Chapter 13: Flame spreading — Report on a Workshop held on December 3–4, 1984 in Pasadena, Cal., National Academy Press, Washington DC, 1986
Altenkirch R.A., Eichborn R., Shang P.C., Buoyancy effects on flame spreading down thermally thin fuels, Combustion and Flame 37 (1980) 71–83
Fernandez-Pello A.C., Santoro R.J., On the dominant mode of heat transfer in downward flame spread, 17th International Symposium on Combustion (1979)
Andracchio C.R., Cochran T.H., Gravity effects on flame spreading over solid surfaces, NASA TN D.8828 (1976)
Altenkirch R.A., Vedha-Nayagam M., Gravitational effects on flames spreading over thick solid surfaces, 35th IAF Congress (1984)
Winchester D.C., An experimental determination of the effect of an opposed buoyant flow on flame spread rate over solid combustibles, NSME Thesis, University of Kentucky (1980)
Sanches Tarifa C., Linan A. et al., Study on heterogeneous combustion processes under microgravity conditions, Technical report of the University of Madrid under the ESA Contract n° 6284/85/F/FL.
Berlad A.L., Combustion of particle clouds, Progress in Astronautics and Aeronautics, 73, 1981
Strehlow R.A., Reuss D.L., Effect of a zero-g environment on flammability limits determined with a standard flammability tube — NASA Report 3259 (1980)
Berlad A.L., Joshi N.D., Gravitational effects on the extinction conditions for premixed flames, 35th IAF Congress (1984)
Cochran T.H., Masica W., Effects of gravity on laminar gas jet diffusion flames, NASA TN D5872 (1970)
Edelman R.B. et al., An analytical and experimental investigation of gravity effects upon laminar gas jet diffusion flames, 14th International Symposium on Combustion (1973)
Summerfield M., Messina N., Smoldering combustion in porous fuels, NASA CR 159528 (1979)
Kanury A.M., Liquid pool burning, NASA CR 159642 (1979)
Ronney P.D., Effect of gravity on haloginated hydrocarbon flame retardent effectiveness, 35th IAF Congress (1984)
Gieras M., Klemens R., Nojcichi, Ignition and combustion of coal particles, 35th IAF Congress (1984)
Barrere M., Stabilité des surfaces de separation de deux milieux en microgravité, 35th IAF Congress (1984)
Kimzey J.M., Zero-gravity flammability, 35th IAF Congress (1984)
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© 1987 European Space Agency, Paris Cedex, France
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Dordain, J.J., Lockwood, F.C. (1987). Combustion. In: Walter, H.U. (eds) Fluid Sciences and Materials Science in Space. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-46613-7_9
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DOI: https://doi.org/10.1007/978-3-642-46613-7_9
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