Heat Transfer Mechanism of Solid Combustion by Mulitple Impinging Jets Involving both Flow and Reaction Field

2013 Fiscal Year Final Research Report

• Project/Area Number: 24860002
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Aerospace engineering
• Research Institution: Toyohashi University of Technology
• Principal Investigator: MATSUOKA Tsuneyoshi 豊橋技術科学大学, 工学(系)研究科(研究院), 助教 (90633040)
• Project Period (FY): 2012-08-31 – 2014-03-31
• Keywords: 衝突噴流 / 平面噴流 / 壁面噴流 / よどみ点 / 熱伝達 / 燃焼速度 / 固体燃焼 / 拡散火炎

Research Abstract

To investigate the effect of jet-to-jet spacing of multiple impinging oxidizer jets on burning rate of solid combustibles, experiments with different jet-to-jet spacing nozzles were performed. Main achievements are as follows.
1. Lateral profiles of burning rate using double impinging oxidizer jets were entirely different depending on spacing of the nozzle. Typically, the point at which maximum burning rate was obtained was shifted outside for the wider spacing nozzle.
2. The Dependence of burning rate on Reynolds number was also shown. As well as heat transfer dependence in the stagnation region of non-combustion case, the burning rate was proportional to Reynolds number to the power of 0.5. On the other hand, the burning rate just below the slits for the case of wider jet-to-jet spacing was proportional to Reynolds number to the power of 0.8.

Research Products

• [Presentation] Effect of distance between double two-dimensional impinging oxidizer jets on burning rate of solid combustibles (2014)
  • Author(s): Tsuneyoshi Matsuoka, Kyohei Kamei, Susumu Noda
  • Organizer: Work-In Progress Poster Colloquium at 35th International Symposium on Combustion
  • Place of Presentation: Hyatt Regency Embarcadero, San Francisco, USA(#W4P062, 査読有り)
  • Year and Date: 20140803-08
• [Presentation] Scale Effect on Flame Spread Rate in Narrow Cylindrical Gap (2013)
  • Author(s): Tsuneyoshi Matsuoka, Yuji Nakmura, Harunori Nagata, Takuya Yamazaki
  • Organizer: Proc. The 8th International Symposium on Advanced Science and Technology in Experimental Mechanics (8th ISEM'13-Sendai)
  • Place of Presentation: Sendai City War Reconstruction Memorial Hall, Sendai, Japan (#069 on CD-ROM, 査読有り)
  • Year and Date: 20131103-06
• [Presentation] 可燃性固体内部の微小空隙内部を燃え拡がる火炎におよぼすスケールの影響 (2013)
  • Author(s): 松岡常吉,中村祐二,永田晴紀,山崎拓也
  • Organizer: 日本実験力学会講演論文集
  • Place of Presentation: 由利本荘市文化交流館カダーレ,由利本荘(No.13, 2013, pp.394-399, 査読なし)
  • Year and Date: 20130820-22
• [Presentation] Gravity Effect on Flow Field of Flame Spread in Fuel Tube (2013)
  • Author(s): Tsuneyoshi Matsuoka, Harunori Nagata, Yuji Nakamura
  • Organizer: Proc. Seventh International Symposium on Scale Modeling (ISSM-7)
  • Place of Presentation: Hirosaki University, Hirosaki, Japan (#4-06 on USB, 査読有り)
  • Year and Date: 20130806-09