| Project/Area Number |
15H04201
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Aerospace engineering
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| Research Institution | Yamaguchi University |
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Principal Investigator |
Mikami Masato 山口大学, 大学院創成科学研究科, 教授 (20274178)
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| Co-Investigator(Kenkyū-buntansha) |
瀬尾 健彦 山口大学, 大学院創成科学研究科, 准教授 (00432526)
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| Co-Investigator(Renkei-kenkyūsha) |
KIKUCHI Masao 宇宙航空研究開発機構, 有人宇宙部門, 研究員 (80371144)
NOMURA Hiroshi 日本大学, 生産工学部, 教授 (30246847)
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| Research Collaborator |
SAPUTRO Herman
SANO Narita
MOTOMATSU Naoya
YOSHIDA Yasuko
IWAI Kentaro
NAGATA Kentaro
UNEYAMA Ryo
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
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| Keywords | 燃焼 / 液滴群 / 燃え広がり / 群燃焼 / 高圧 / 航空宇宙工 / 航空宇宙工学 |
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| Outline of Final Research Achievements |
This research conducted microgravity experiments of flame spread over
droplet-cloud elements and randomly distributed droplet clouds in a wide pressure range in order to improve understanding of the flame spread and group-combustion excitation in fuel sprays under high-altitude relight condition of aero engines. The experiments elucidated the effects of droplet diameter ratio, local droplet interaction and ambient pressure. The results show that the thermal conduction from a burning droplet to the next unburned droplet plays an important role and the burning lifetime of the base droplet controls the flame-spread limit. Anomalous flame-spread behavior was observed over 1.5 MPa and near the group-combustion-excitation limit in randomly distributed droplet clouds. These phenomena should be elucidated in future researches.
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