Elucidation and Modeling on Unsteady Combustion Behavior of Heterogeneous Fuel System

• Project/Area Number: 21760162
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Thermal engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: NAKAYA Shinji Osaka Prefecture University, 工学研究科, 助教 (00382234)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 燃焼 / 微小重力環境 / 液滴燃焼 / 噴霧燃焼 / すす / 放射 / アルコール燃料

Research Abstract

Unsteady combustion behaviors of the isolated droplet for alcohols and hydrocarbons were investigated and the effect of fuel properties, ambient components and soot were focused upon. Ethanol combustion in air showed a quasi-steady behavior and a weak effect of the water condensation into the droplet. N-buthanol with a higher boiling temperature shows a gradual increasing trend of the burning rate. An unsteady stepwise increase in the burning rate for sooting fuels were clearly observed. High concentrations of ambient carbon dioxide suppress the soot production and it results in a mitigation of the unsteady behavior. On the other hand, high concentrations of argon enhances the soot production and the unsteady behavior was also promoted. The effect of sooting and ambient factors on the unsteady burning behaviors were clarified.

Research Products

• [Journal Article] Combustion behaviors of isolated n-decane and ethanol droplets in Carbon Dioxide-Rich Ambience under Microgravity (2011)
  • Author(s): Nakaya, S., Segawa, D., Kadota, T., Nagashima, Y., Furuta, T.
  • Journal Title: Proceedings of the Combustion Institute Vol.33 Pages: 2031-2038
  • Peer Reviewed
• [Journal Article] Combustion behaviors of isolated n-decane and ethanol droplets in Carbon Dioxide-Rich Ambience under Microgravity (2011)
  • Author(s): Nakaya, S., Segawa, D., Kadota, T., Nagashima, Y., Furuta, T.
  • Journal Title: Proceedings of the Combustion Institute Volume: 33 Pages: 2031-2038
  • Peer Reviewed
• [Journal Article] Effects of Carbon Dioxide on Unsteady Combustion of Isolated Fuel Droplet in Microgravity (2010)
  • Author(s): Nakaya, S., Nagashima, Y., Takase, K., Segawa, D., Kadota, T.
  • Journal Title: Transactions of JSASS, Space Technology Japan Vol.8 Pages: 1-7
  • NAID: 130000450602
  • Peer Reviewed
• [Journal Article] Effects of Carbon Dioxide on Unsteady Combustion of Isolated Fuel Droplet in Microgravity (2010)
  • Author(s): Nakaya, S., Nagashima, Y., Takase, K., Segawa, D., Kadota, T.
  • Journal Title: Transactions of JSASS, Space Technology Japan Volume: 8 Pages: 1-7
  • NAID: 130000450602
  • Peer Reviewed
• [Presentation] 微小重力環境下での二酸化炭素を含む雰囲気中におけるアルコール系単一燃料液滴の非定常燃焼挙動に関する研究 (2010)
  • Author(s): 古田智也, 中谷辰爾, 瀬川大資, 角田敏一
  • Organizer: 第48回燃焼シンポジウム
  • Place of Presentation: 福岡ガーデンパレス,都久志会館
  • Year and Date: 2010-12-02
• [Presentation] Combustion Behaviors of Isolated n-Decane and Ethanol Droplets in Carbon Dioxide - Rich Ambience under Microgravity (2010)
  • Author(s): Nakaya, S., Segawa, D., Kadota, T., Nagashima, Y., Furuta, T.
  • Organizer: 33rd International Symposium on Combustion
  • Place of Presentation: Tsinghua University (China).
  • Year and Date: 2010-08-05
• [Presentation] Combustion behaviors of isolated n-decane and ethanol droplets in Carbon Dioxide-Rich Ambience under Microgravity (2010)
  • Author(s): Nakaya, S., Segawa, D., Kadota, T., Nagashima, Y., Furuta, T.
  • Organizer: 33rd International Symposium on Combustion
  • Place of Presentation: Tsinghua University (China)
  • Year and Date: 2010-08-05
• [Presentation] Effects of Carbon Dioxide on Isolated Droplet Combustion forSooting and non-Sooting Fuels in Microgravity (2010)
  • Author(s): Nakaya, S., Furuta, T., Nagashima, Y., Segawa, D., Kadota, T.
  • Organizer: Scientific Assembly of the Committee on space research 2010 (COSPAR 2010)
  • Place of Presentation: Bremen Arena (Germany).
  • Year and Date: 2010-07-18
• [Presentation] Effects of Carbon Dioxide on Isolated Droplet Combustion for Sooting and non-Sooting Fuels in Microgravity (2010)
  • Author(s): Nakaya, S., Furuta, T., Nagashima, Y., Segawa, D., Kadota, T.
  • Organizer: Scientific Assembly of the Committee on space research 2010 (COSPAR 2010)
  • Place of Presentation: Bremen Arena (Germany)
  • Year and Date: 2010-07-18
• [Presentation] 空気雰囲気中における微小重力環境下での非定常液滴燃焼挙動に関する研究 (2009)
  • Author(s): 古田智也, 中谷辰爾, 長嶋芳明, 瀬川大資, 角田敏一
  • Organizer: 第47回燃焼シンポジウム
  • Place of Presentation: 札幌コンベンションセンター
  • Year and Date: 2009-12-04
• [Presentation] 微小重力環境下での二酸化炭素を含む雰囲気中における非定常液滴燃焼挙動 (2009)
  • Author(s): 中谷辰爾, 長嶋芳明, 古田智也, 瀬川大資, 角田敏一
  • Organizer: 第47回燃焼シンポジウム
  • Place of Presentation: 札幌コンベンションセンター
  • Year and Date: 2009-12-04
• [Presentation] 空気雰囲気中における微小重力環境下での非定常液滴燃焼挙動に関する研究 (2009)
  • Author(s): 古田智也, 中谷辰爾, 長嶋芳明, 瀬川大資, 角田敏一
  • Organizer: 第47回燃焼シンポジウム(日本燃焼学会)
  • Place of Presentation: 札幌コンベンションセンター「SORA」
  • Year and Date: 2009-12-04
• [Presentation] 微小重力環境下での二酸化炭素を含む雰囲気中における非定常液滴燃焼挙動 (2009)
  • Author(s): 中谷辰爾, 長嶋芳明, 古田智也, 瀬川大資, 角田敏一
  • Organizer: 第47回燃焼シンポジウム(日本燃焼学会)
  • Place of Presentation: 札幌コンベンションセンター「SORA」
  • Year and Date: 2009-12-04
• [Presentation] Effects of Carbon Dioxide on Unsteady Combustion of Isolated Fuel Droplet in Microgravity (2009)
  • Author(s): Nakaya, S., Nagashima, Y., Takase, K., Segawa, D., Kadota, T.
  • Organizer: 27th International Symposium on Space Technology and Science
  • Place of Presentation: Tsukuba International Convention Center (Japan).
  • Year and Date: 2009-07-09
• [Presentation] Effects of Carbon Dioxide on Unsteady Combustion of Isolated Fuel Droplet in Microgravity (2009)
  • Author(s): S.Nakaya, Y.Nagashima, K.Takase, D.Segawa, T.Kadota
  • Organizer: 27th International Symposium on Space Technology and Science
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2009-07-09