Basic research of the generation mechanism of aerodynamic Noise and its control

• Project/Area Number: 19360079
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Tohoku University
• Principal Investigator: INOUE Osamu Tohoku University, 流体科学研究所, 教授 (00107476)
• Co-Investigator(Kenkyū-buntansha): FUKUNISHI Yu 東北大学, 大学院・工学研究科, 教授 (60189967) ; HATAKEYAMA Nozomu 東北大学, 大学院・工学研究科, 准教授 (50312666)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000); Fiscal Year 2008: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2007: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
• Keywords: 流体騒音 / エオルス音 / キャビティー騒音 / 渦音 / 流体 / 流体工学 / 計算物理 / 公害防止・対策 / シミュレーション工学

Research Abstract

航空機のジェット騒音や自動車の排気音など交通輸送機関の高速化に伴って生ずる騒音の多くは流体力学的な原因に基づく音(流体音)である。本研究課題では、高次精度(空間8次精度、時間4次精度)の差分スキームを用いることにより、流体の運動を支配する方程式、即ち圧縮性ナビエ・ストークスの式を精度良く解くことにより、渦運動が中心的役割を果たしている流れ場に生ずる流体騒音の発生機構を明らかにし、その制御方法を提案することができた。

Research Products

• [Journal Article] Active Control of Cavity Noise by Fluidic Oscillators (2008)
  • Author(s): M. Shigeta, T. Miura, S. Izawa and Y. Fukunishi
  • Journal Title: Theoretical and Applied Mechanics Japan Vol.57
  • NAID: 130004463671
  • Peer Reviewed
• [Journal Article] Vortex Shedding from a Circular Cylinder of Finite Length at Low Reynolds Numbers (2008)
  • Author(s): O. Inoue and A. Sakuragi
  • Journal Title: Physics of Fluids Vol.19, No.3
  • Peer Reviewed
• [Journal Article] Beat of Sound Generated by Flow past Two Side-by-side Square Cylinders of Different Sizes (2008)
  • Author(s): O. Inoue and Y. Suzuki
  • Journal Title: Physics of Fluids Vol.20, No.7
  • Peer Reviewed
• [Journal Article] Sound Generation by a Vortex Ring Collision with a Wall (2008)
  • Author(s): Y. Nakashima and O. Inoue
  • Journal Title: Physics of Fluids Vol.20, No.12
  • Peer Reviewed
• [Journal Article] Sound Generation by a Vortex Ring Collision with a Wall (2008)
  • Author(s): Y. Nakashima and O. Inoue
  • Journal Title: Physics of Fluids. Vol.20, No.12 Pages: 126104-126120
  • Peer Reviewed
• [Journal Article] Beat of Sound Generated by Flow past Two Side-by-side Square Cylinders of Different Sizes (2008)
  • Author(s): O. Inoue and Y. Suzuki
  • Journal Title: Physics of Fluids. Vol.20, No.7 Pages: 76101-76108
  • Peer Reviewed
• [Journal Article] Vortex Shedding from a Circular Cylinder of Finite Length at Low Reynolds Numbers (2008)
  • Author(s): O. Inoue and A. Sakuragi
  • Journal Title: Physics of Fluids. Vol.19, No.3 Pages: 33601-33613
  • Peer Reviewed
• [Journal Article] Active Control of Cavity Noise by Fluidic Oscillators (2008)
  • Author(s): M. Shigeta, T. Miura, S. Izawa and Y. Fukunishi
  • Journal Title: Theoretical and Applied Mechanics Japan. Vol.57(Accepted)
  • NAID: 130004463671
  • Peer Reviewed
• [Journal Article] Vortex shedding from a circular cylinder of finite length at low Reynolds numbers (2008)
  • Author(s): O. Inoue and A. Sakuragi
  • Journal Title: Physics of Fluids 20 Pages: 1-12
  • Peer Reviewed
• [Journal Article] Beat of Sound Generated by Flow past Three Side-by-side Square Cylinders (2007)
  • Author(s): O. Inoue and Y. Suzuki
  • Journal Title: Physics of Fluids Vol.19, No.4
  • Peer Reviewed
• [Journal Article] 3-D DNS of vortex sound by a finite difference method with an L-grid system (2007)
  • Author(s): Y. Nakashima and O. Inoue
  • Journal Title: Proc. 10th ISGG Conference on Numerical Grid Generation (CD-Rom)
  • Peer Reviewed
• [Journal Article] DNS of Aeolian tones by a highly-accurate finite difference method (2007)
  • Author(s): Y. Suzuki and O. Inoue
  • Journal Title: Proc. 10th ISGG Conference on Numerical Grid Generation (CD-Rom)
  • Peer Reviewed
• [Journal Article] Three-dimensional DNS of sound generated by oblique collision of vortex rings (2007)
  • Author(s): Y. Nakashima and O. Inoue
  • Journal Title: Proc. 10th ISGG Conference on Numerical Grid Generation (CD-Rom)
  • Peer Reviewed
• [Presentation] Suppression of Cavity Noise by Controlling the Spanwise Phase of the Separating Flow. (Invited Paper) (2008)
  • Author(s): Y. Fukunishi, M. Shigeta and S. Izawa
  • Organizer: 2nd International Conference on Jets Wakes and Separated Flows
  • Place of Presentation: Berlin, Germany
• [Presentation] Suppression of Cavity Noise by Fluidic Oscillators (2008)
  • Author(s): S. Izawa, T. Miura, M. Shigeta and Y. Fukunishi
  • Organizer: 2nd International Conference on Jets, Wakes and Separated Flows
  • Place of Presentation: Berlin, Germany
• [Presentation] DNS of Acoustic Sound Generated by Collision of Vortex Rings (2008)
  • Author(s): Y. Nakashima and O. Inoue
  • Organizer: 5th European Congress on Computational Methods in Applied Science and Engineering(ECCOMAS2008)
  • Place of Presentation: Venice, Italy
• [Presentation] DNS of Acoustic Sound Generated by Collision of Vortex Rings (2008)
  • Author(s): Y. Nakashima and O. Inoue
  • Organizer: 5th European Congress on Computational Methods in Applied Science and Engineering (ECCOMAS2008)
  • Place of Presentation: Venice, Italy
• [Presentation] Suppression of Cavity Noise by Controlling the Spanwise Phase of the Separating Flow. (Invited Paper) (2008)
  • Author(s): Y. Fukunishi, M. Shigeta and S. Izawa
  • Organizer: 2nd International Conference on Jets, Wakes and Separated Flows
  • Place of Presentation: Berlin, Germany
• [Presentation] 渦二題-後流の渦構造の話と渦音の話-(特別講演) (2008)
  • Author(s): 井上督
  • Organizer: 第40回流体力学講演会
  • Place of Presentation: 仙台
• [Presentation] 二つの渦輪の衝突による音波発生の三次元DNS (2007)
  • Author(s): 中嶋吉隆、井上 督
  • Organizer: 第21回数値流体力学シンポジウム
  • Place of Presentation: 秋葉原コンベンションセンター
  • Year and Date: 2007-12-19
• [Presentation] 径比の異なる並列二角柱周りの流れから発生する音の直接数値計算 (2007)
  • Author(s): 鈴木良典、井上 督
  • Organizer: 第21回数値流体力学シンポジウム
  • Place of Presentation: 秋葉原コンベンションセンター
  • Year and Date: 2007-12-19
• [Presentation] フルイディクスを応用したキャビティ音の能動制御 (2007)
  • Author(s): 三浦 聡允, 前原 翔太, 茂田 正哉, 伊澤 精一郎, 福西 祐
  • Organizer: 日本機械学会2007年 年次大会
  • Place of Presentation: 関西大学千里山キャンパス
  • Year and Date: 2007-09-10
• [Presentation] 3-D DNS of Vortex Sound by a Finite Difference Method with an L-grid System (2007)
  • Author(s): Y. Nakashima and O. Inoue
  • Organizer: 10th ISGG Conference on Numerical Grid Generation
  • Place of Presentation: Crete, Greece
• [Presentation] DNS of Aeolian Tones by a Highly-Accurate Finite Difference Method (2007)
  • Author(s): Y. Suzuki and O. Inoue
  • Organizer: 10th ISGG Conference on Numerical Grid Generation
  • Place of Presentation: Crete, Greece
• [Presentation] Three-Dimensional DNS of Sound Generated by Oblique Collision of Vortex Rings. AIAA Paper 2007-3502 (2007)
  • Author(s): Y. Nakashima and O. Inoue
  • Organizer: 13th AIAA/CEAS AeroAcoustics Conference
  • Place of Presentation: Rome, Italy