A study of a coarse particle dispersion mechanism in a swirl flame

• Project/Area Number: 25630055
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Sophia University
• Principal Investigator: Watanabe Mariko 上智大学, 理工学部, 准教授 (80452473)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 混相流 / 燃焼 / 粒子

Outline of Final Research Achievements

Studies of laboratory-scale swirl flames and motion of a heated solid fuel particle were performed both experimentally and via numerical simulation to clarify a dispersion mechanism of particles in a swirl flame. The swirl velocity of the gas increased as the measuring point approached the flame surface but decreased as the point approached the center of the flame. When the air was supplied in the swirled direction, the magnitude of the air’s velocity affected both the length of the swirl flame and the gas concentration distribution. A change in the trajectory of the particle by a jet of pyrolysis gas was experimentally observed. It was numerically clarified that a local gas jet from the particle surface and a change in particle temperature affected the drag and lift forces acting on the particle.

Research Products

• [Presentation] 表面噴き出しや発熱を伴う粒子の抗力・揚力に関する研究 (2015)
  • Author(s): 矢作丞史、安嶋大稀、渡邉摩理子
  • Organizer: 日本機械学会2015年度年次大会
  • Place of Presentation: 北海道大学工学部
  • Year and Date: 2015-09-14 – 2015-09-16
• [Presentation] 表面噴き出しや発熱を伴う粒子の抗力・揚力に関する数値解析的研究 (2015)
  • Author(s): 矢作丞史, 安嶋大稀, 渡邉摩理子
  • Organizer: 日本機械学会2015年度年次大会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2015-09-14