Enhancement of Fuel Mixing and Jet Penetration using Pulsed Injection into a Supersonic Flow

• Project/Area Number: 20760105
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Fluid engineering
• Research Institution: Tohoku University
• Principal Investigator: KOUCHI Toshinori Tohoku University, 大学院・工学研究科, 助教 (40415922)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 圧縮 / 非圧縮 / 超音速混合 / 噴流 / 非定常流れ / 推進工学

Research Abstract

This research experimentally and numerically investigated the penetration characteristics of the pulsed injection into Mach 2 supersonic crossflow. This research revealed the pulsed jet penetration in a rising phase of injection pressure was higher than that in a declining phase of injection pressure at a certain value of injection pressure. This hysteresis was owing to the upward flow produced by the pulsed jet like a slug which inclined toward the injection wall. The numerical simulations revealed the vortex rings was generated in each pulse cycle. They dominated the jet penetration and promoted mixing of the injectant with crossflow-air. Based on these experimental and numerical results, we conclude that the pulsed injection could control the jet penetration and mixing by changing its frequency.

Research Products

• [Journal Article] Penetration Characteristics of Pulsed Injection into Supersonic Crossflow (2010)
  • Author(s): T.Kouchi, K.Sasaya, J.Watanabe, H.Shibaya-ma, G.Masuya
  • Journal Title: AIAA paper Pages: 2010-6645
• [Journal Article] Numerical Simulation of Pulsed Injection into a Supersonic Crossflow (2010)
  • Author(s): K.Sasaya, J.Watanabe, T.Kouchi, G.Ma-suya
  • Journal Title: AJCPP Pages: 2010-2058
• [Journal Article] Penetration Characteristics of Pulsed Injection into Supersonic Crossflow (2010)
  • Author(s): T.Kouchi, K.Sasaya, J.Watanabe, H.Shibayama, G.Masuya
  • Journal Title: AIAA paper 2010-6645
• [Journal Article] Numerical Simulation of Pulsed Injection into a Supersonic Crossflow (2010)
  • Author(s): K.Sasaya, J.Watanabe, T.Kouchi, G.Masuay
  • Journal Title: Proceedings of Asian Joint Conference on Propulsion and Power 2010
• [Journal Article] Time-Space Trajectory of Unsteady Jet into Supersonic Crossflow Using High-Speed Framing Schlieren Images (2009)
  • Author(s): T.Kouchi, T.Hoshino, K.Sasaya, G.Ma-suya
  • Journal Title: AIAA paper Pages: 2009-7316
• [Journal Article] Time-Space Trajectory of Unsteady Jet into Supersonic Crossflow Using High-Speed Framing Schlieren Images (2009)
  • Author(s): T.Kouchi, T.Hoshino, K.Sasaya, G.Masuya
  • Journal Title: AIAA paper 2009-7316
• [Presentation] Penetration Characteristics of Pulsed Injection into Supersonic Crossflow (2010)
  • Author(s): T.Kouchi, K.Sasaya, J.Watanabe, H.Shibayama, G.Masuya
  • Organizer: 46^<th> AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
  • Place of Presentation: Nashville USA.
  • Year and Date: 2010-07-26
• [Presentation] 高速シュリーレンを用いた超音速噴流場のスペクトル解析 (2010)
  • Author(s): 河内俊憲, 升谷五郎
  • Organizer: 第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010
  • Place of Presentation: 米子
  • Year and Date: 2010-06-25
• [Presentation] Numerical Simulation of Pulsed Injection into a Supersonic Crossflow (2010)
  • Author(s): K.Sasaya, J.Watanabe, T.Kouchi, G.Ma-suya
  • Organizer: Asian Joint Conference on Propulsion and Power 2010
  • Place of Presentation: Miyazaki, Japan.
  • Year and Date: 2010-03-05
• [Presentation] Penetration Characteristics of Pulsed Injection into Supersonic Crossflow (2010)
  • Author(s): T.Kouchi, K.Sasaya, J.Watanabe, H.Shibayama, G.Masuya
  • Organizer: 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
  • Place of Presentation: Nashville, USA
• [Presentation] 高速シュリーレンを用いた超音速噴流場のスペクトル解析 (2010)
  • Author(s): 河内俊憲, 升谷五郎
  • Organizer: 第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010
  • Place of Presentation: 米子,日本
• [Presentation] Numerical Simulation of Pulsed Injection into a Supersonic Crossflow (2010)
  • Author(s): K.Sasaya, J.Watanabe, T.Kouchi, G.Masuay
  • Organizer: Asian Joint Conference on Propulsion and Power 2010
  • Place of Presentation: Miyazaki, Japan
• [Presentation] Time-Space Trajectory of Unsteady Jet into Supersonic Crossflow Using High-Speed Framing Schlieren Images (2009)
  • Author(s): T.Kouchi, T.Hoshino, K.Sasaya, G.Ma-suya
  • Organizer: 16^<th> AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference
  • Place of Presentation: Bremen, Germany.
  • Year and Date: 2009-10-21
• [Presentation] 超音速横風中のパルス噴射において観測された噴流貫通のヒステリシス (2009)
  • Author(s): 河内俊憲, 升谷五郎, 柴山博治, 星野貴久
  • Organizer: 日本航空宇宙学会北部支部2009年講演会ならびに第10回再使用型宇宙推進系シンポジウム
  • Place of Presentation: 仙台
  • Year and Date: 2009-03-11
• [Presentation] 超音速横風中のパルス噴射において観測された噴流貫通のヒステリシス (2009)
  • Author(s): 河内俊憲
  • Organizer: 日本航空宇宙学会北部支部2009講演会ならびに第10回再使用型宇宙輸送系シンポジウム
  • Place of Presentation: 仙台
  • Year and Date: 2009-03-11
• [Presentation] Time-Space Trajectory of Unsteady Jet into Supersonic Crossflow Using High-Speed Framing Schlieren Images (2009)
  • Author(s): T.Kouchi, T.Hoshino, K.Sasaya, G.Masuya
  • Organizer: 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference
  • Place of Presentation: Breamen, Germany
• [Presentation] 超音速流におけるパルス噴射の貫通特性 (2008)
  • Author(s): 柴山博治, 河内俊憲, 升谷五郎
  • Organizer: 第40回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2008
  • Place of Presentation: 仙台
  • Year and Date: 2008-06-12
• [Presentation] 高速シュリーレン撮影を用いた超音速流中における垂直噴流の貫通の評価 (2008)
  • Author(s): 河内俊憲, 柴山博治, 升谷五郎
  • Organizer: 第40回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2008
  • Place of Presentation: 仙台
  • Year and Date: 2008-06-12
• [Presentation] 超音速流中のパルス噴流の貫通特性 (2008)
  • Author(s): 柴山博治
  • Organizer: 第40回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2008
  • Place of Presentation: 仙台
  • Year and Date: 2008-06-12
• [Remarks] ホームページ
  • URL: http://www.scramjet.mech.tohoku.ac.jp/lab/index.htm
• [Remarks] 第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010流体力学部門 最優秀賞
• [Remarks]
  • URL: http://www.scramjet.mech.tohoku.ac.jp/lab/index.htm
• [Remarks]
  • URL: http://www.scramjet.mech.tohoku.ac.jp/lab/index.htm