Elucidation study of combustion dynamism of three-dimensionally dispersed fuel system through experiments in microgravity environment

微重力环境下三维分散燃料系统燃烧动力学实验阐明研究

• 批准号: 21360419
• 负责人: SEGAWA Daisuke
• 金额: $ 6.82万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21360419/
• 关键词: 推進・エンジン; 液体燃料; 噴霧燃焼; 群燃焼; 非定常蒸発; 航空宇宙工学; 熱工学; 微小重力; 蒸発

Fuel droplet clusters in which the droplets were arranged to form nearly spherical outer shape were actually produced as the three-dimensionally dispersed fuel systems, and the experiments of evaporation, autoignition and combustion, of those clusters were conducted where the clusters were quickly introduced into hot air ambience. The behaviors and the characteristic time periods of the evaporation, autoignition and combustion as well as the flame shapes were measured and examined through optical observation. We focused our attention especially on the cases for finer droplets and for polydisperse droplets, and those effects were examined. As the results, the knowledge and values concerning the scale effects were accumulated, and moreover, it was confirmed for the first time that the situations where the autoignition occurred after the part of the droplets were disappeared(evaporated) were reproduced.

实际上产生了其中液滴被布置成形成近似球形外形的燃料液滴簇作为三维分散的燃料系统，并且进行了这些簇的蒸发、自燃和燃烧的实验，其中簇被快速引入热空气环境中。通过光学观察，对蒸发、自燃和燃烧的特性、特征时间以及火焰形状进行了测量和分析。我们把我们的注意力特别集中在细液滴和多分散液滴的情况下，这些影响进行了检查。作为结果，积累了关于尺度效应的知识和值，此外，首次确认再现了在部分液滴消失（蒸发）之后发生自燃的情况。

项目成果

Effects of Droplet Spacing on Evaporation of a Cluster of 13 Fuel Droplets

液滴间距对 13 个燃料液滴簇蒸发的影响

• 发表时间: 2009
• 期刊: Transactions of JSASS, Space Technology Japan Vol.7
• 作者: D.Segawa;ほか5名
• 通讯作者: ほか5名

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不均一な燃料液滴群の蒸発および燃焼挙動

异质燃料液滴的蒸发和燃烧行为

• 发表时间: 2012
• 作者: 岡祐輔;藤室孝之;多田純輝;山下宏顕;瀬川大資;片岡秀文
• 通讯作者: 片岡秀文