@inproceedings{oai:jaxa.repo.nii.ac.jp:00013953,
 author = {尾山, 孝博 and 菅原, 直人 and 山名, 俊輔 and 岡島, 敏 and Oyama, Takahiro and Sugawara, Naoto and Yamana, Shunsuke and Okajima, Satoshi},
 book = {宇宙利用シンポジウム　第19回　平成14年度, Space Utilization Research: Proceedings of the Nineteenth Space Utilization Symposium},
 month = {Feb},
 note = {The flame propagation behavior of combustible mixtures close to the flammability limits are very slow so that the flame development is markedly affected by buoyancy induced from gravity. Under condition of normal gravity it is very difficult to determine the fundamental combustion characteristics such as burning velocity of such mixtures. Thus, the microgravity environment realized by free fall method is employed in this experiment. Especially microgravity environment makes it possible to achieve the symmetrical behavior of combustion phenomena even at very lean combustion mixtures due to eliminating the gravity effect. The main conclusion is as follows: The Lewis number (Le = mass diffusivity/thermal diffusivity) becomes smaller than unity for lean mixtures of propane in air or Ar. The flame propagation will be limited by relatively higher heat transfer rate from the flame front to the unburnt mixtures. As the mixture becomes leaner and leaner, the enhanced thermal diffusivity shifts Lewis number to the smaller value and the poor mass transfer conditions make the flame propagation irregular., 資料番号: AA0045438046},
 pages = {159--162},
 publisher = {宇宙科学研究所, The Institute of Space and Astronautical Science (ISAS)},
 title = {微小重力環境を利用しての希薄限界混合気の燃焼特性の解明に関する研究},
 year = {2003}
}