Control of the sound generation due to impinging shear layersby the hole-tone feedback cycle

• Project/Area Number: 18560152
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Yamagata University
• Principal Investigator: LANGTHJEM M・A Yamagata University, 大学院・理工研究科, 准教授 (30344815)
• Research Collaborator: NAKANO Masami 東北大学, 流体科学研究所
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,940,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥540,000); Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2007: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2006: ¥1,600,000 (Direct Cost: ¥1,600,000)
• Keywords: 音響 / 流力騒音 / 制御 / 離散渦法 / 渦騒音 / 境界要素法

Research Abstract

離散渦法及びPowell・Howe 渦音論(theory of vortex sound)を基づいた三次元の数値解析法を開発した。そのほか、数学的に厳密な軸対称のあるモデルも開発した。

Research Products

• [Journal Article] A threedimensionalnumerical study of thehole-tone feedback problem (2009)
  • Author(s): M. A. Langthjem, M. Nakano
  • Journal Title: Journal of Computational Physics (submitted)
  • Peer Reviewed
• [Journal Article] Numericalstudy of the hole-tone feedback cyclebased on an axisymmetric formulation (2009)
  • Author(s): M. A. Langthjem, M. Nakano
  • Journal Title: Fluid Dynamics Research (accepted for publication, in press)
  • Peer Reviewed
• [Journal Article] Soundgeneration in the hole-tonefeedback problem, RIMS 研究集会 (2009)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: 非線形波動現象の数理と応用, RIMS講研録 1645 Pages: 221-230
• [Journal Article] Influenceof non-axisymmetric perturbations onthe hole-tone feedback cycle: Anumerical study(Paper # 279) (2009)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: In : Proceedings of Inter・Noise 2006, Honolulu, HI, USA (CD-Rom) Pages: 9-9
• [Journal Article] Numerical study of the hole-tone feedback cycle based on an axisymmetric formulation (2009)
  • Author(s): M. A. Langthjem, M. Nakano
  • Journal Title: Fluid Dynamics Research (Invited paper for Special Issue on Aeroacoustics) (To appear 2009) Pages: 25-38
  • NAID: 10028205626
  • Peer Reviewed
• [Journal Article] Sound generation in the hole-tone feedback problem (2009)
  • Author(s): M. A. Langthjem, M. Nakano
  • Journal Title: RIMS硬究集会, 非線形波動現象の数理と応用, RIMS講研録 (To appear) Pages: 10-10
• [Journal Article] The effectof non-axisymmetric flow disturbanceson the sound generation in the holetonefeedback cycle(Paper#10414) (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: In : XXIIInternational Congress of Theoreticaland Applied Mechanics (ICTAM 2008) (CD-ROM) Pages: 2-2
  • Peer Reviewed
• [Journal Article] ホールトンフィードバック問題での自励流体振動の制御[Control of self-sustainedflow oscillations in the hole-tonefeedback problem] (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: 第51回自動制御連合講演会、論文集 (CD-ROM) Pages: 5-5
• [Journal Article] Numericalstudy of the hole-tone feedbackcycle (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: In : 日本応用数理学会2008年度年会講演予稿集 Pages: 101-102
• [Journal Article] Selfsustainedflow-oscillations in thehole-tone problem (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: In : 非線形波動現象の数理と応用.数理解析研究所講究録 1594 Pages: 18-33
• [Journal Article] The effect of non-axisymmetric flow disturbances on the sound generation in the holetone feedback cycle (2008)
  • Author(s): M. A. Langthjem, M. Nakano
  • Journal Title: XXII International Congress of Theoretical and Applied Mechanics (ICTAM 2008), CD-ROM ISBN 978-0-9805142-1-6 Pages: 2-10414
  • Peer Reviewed
• [Journal Article] ホールトンフィードバック問題での自励流体振動の制御Control of self-sustained flow oscillations in the hole-tone feedback problem (2008)
  • Author(s): M. A. ランジェム・中野政身 M. A. Langthjem, M. Nakano
  • Journal Title: 第51回自動制御連合講演会、論文集 CD-ROM Pages: 6-6
• [Journal Article] Numerical study of the hole-tone feedback cycle (2008)
  • Author(s): M. A. Langthjem, M. Nakano
  • Journal Title: 日本応用数里学会2008年度年会講演予稿集 ISSN 1345-3378 Pages: 2-2
• [Journal Article] A three-dimensional study into non-axisymmetric perturbations of the hole-tone feedback cycle (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: Proceedings of IUTAM Symposium on Unsteady Separated Flows and their Control (Springer) Pages: 5-5
  • Peer Reviewed
• [Journal Article] The effect of non-axisymmetric flow disturbances on the sound generation in the holetone feedback cycle (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: XXII International Congress of Theoretical and Applied Mechanics (ICTAM 2008), Adelaide, Aus-tralia 2008-extended abstract; accepted for lecture presentation (Session: Acoustics) Pages: 2-2
  • Peer Reviewed
• [Journal Article] Self-sustained flow-oscillations in the hole-tone problem (2008)
  • Author(s): M.A. Langthjem, M.Nakano
  • Journal Title: RIMS研究集会, 波動現象の数里と応用, RIMS講研録 To appear Pages: 16-16
• [Journal Article] A threedimensionalstudy into non-axisymmetricperturbations of the hole-tonefeedback cycle. In : Proceedings of theIUTAM Symposium "Unsteady SeparatedFlows and their Control" (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: Corfu,Greece(M. Braza, K.Hourigan, eds.), Springer-Verlag,(ISBN : 978-1-4020-9897-0) Pages: 5-5
  • Peer Reviewed
• [Journal Article] Control ofsound generation in the hole-tonefeedback cycle by non-axi-symmetricflow perturbations (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: In : 日本流体力学会 年会2007講演要旨集 (CD-ROM) Pages: 2-2
• [Journal Article] A numericalstudy on the influence of non-axisymmetricflow perturbations in thehole-tone feedback problem (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: In : 非線形波動現象の数理と応用.数理解析研究所講究録 1543 Pages: 21-30
• [Journal Article] Control of sound generation in the hole-tone feedback cycle by non-axisymmetric flow perturbations (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Journal Title: 日本流体力学会 年会2007講演要旨集 (CD-Rom) Pages: 2-2
  • NAID: 110008459188
• [Journal Article] A numerical study on the influence of non-axisymmetric flow perturbations on the hole-tone feedback cycle (2007)
  • Author(s): MA Langthjem, M Nakano
  • Journal Title: RIMS研究集会, 波動現象の数理と応用, RIMS講究録, 京都大学 (To appera) Pages: 10-10
• [Journal Article] A three-dimensional numerical study into non-axisymmetric perturbations of the hole-tone feedback cycle (2007)
  • Author(s): MA Langthjem, M Nakano
  • Journal Title: IUTAM symposium on Unsteady Separated Flows and Their Control June 2007 (To appear)(Proceedings to be published by Springer Verlag) Pages: 5-5
• [Journal Article] Influence of swirl on the stability of a rod in annular leakage flow (2007)
  • Author(s): MA Langthjem, M Nakano
  • Journal Title: Journal of Fluids and Structures 23・2 Pages: 239-337
• [Journal Article] Physical mechanism of the destabilizing effect of damping in continuous non-conservative dissipative systems (2007)
  • Author(s): Y Sugiyama, MA Langhtjem
  • Journal Title: International Journal of Non-Linear Mechanics (doi : 10,1016/j.ijnonlinmec.2006.11.011) (In press) Pages: 1-14
• [Journal Article] Influence of non-axisymmetric perturbations on the hole-tone feedback cycle : A numerical study (2006)
  • Author(s): MA Langthjem, M Nakano
  • Journal Title: Proceedings of Inter ・Noise 2006, Honolulu, HI, USA Paper#279(Invited)(CD-Rom) Pages: 9-9
• [Journal Article] A flexible rod in annular leakage flow : Influence of turbulence and Equilibrium offset, and analysis of instability mechanisms (2006)
  • Author(s): MA Langthjem, H Morita, T Nakamura, M Nakano
  • Journal Title: Journal of Fluids and Structures 22・5 Pages: 617-645
• [Presentation] Aspects of the hole-tone feedback problem (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: 第28回流力シンポジウム
  • Place of Presentation: 東京大学工学部本郷キャンパス
  • Year and Date: 2008-12-06
• [Presentation] Aspects of the hole-tone feedback problem (2008)
  • Author(s): Mikael A. Langthjem
  • Organizer: 第28回流力騒音シンポジウム
  • Place of Presentation: 東京大学工学部本郷キャンパス
  • Year and Date: 2008-12-06
• [Presentation] ホールトンフィードバック問題での自励流体振動の制御[Control of self-sustained flow oscillations in the hole-tone feedback problem] (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: 第51回自動制御連合講演会
  • Place of Presentation: 山形大学工学部, 米沢キャンパス
  • Year and Date: 2008-11-22
• [Presentation] ホールトンフィードバック問題での自励流体振動の制御Control of self-sustained flow oscillations in the hole-tone feedback problem (2008)
  • Author(s): Mikael A. Langthjem
  • Organizer: 第51回自動制御連合講演会
  • Place of Presentation: 山形大学工学部、米沢
  • Year and Date: 2008-11-22
• [Presentation] Aspects ofthe hole-tone feedback problem (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: RIMS研究集会,非線形波動現象の数理と応用
  • Place of Presentation: 京都大学数理研究所
  • Year and Date: 2008-10-23
• [Presentation] Aspects of the hole-tone feedback problem (2008)
  • Author(s): Mikael A. Langthjem
  • Organizer: RIMS研究集会, 非線形波動現象の数理と応用
  • Place of Presentation: 京都大学数里研究所
  • Year and Date: 2008-10-23
• [Presentation] Numericalstudy of the hole-tone feedbackcycle (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: 日本応用数里学会2008年度年会
  • Place of Presentation: 東京大学柏キャンパス
  • Year and Date: 2008-09-17
• [Presentation] Numerical study of the hole-tone feedback cycle (2008)
  • Author(s): Mikael A. Langthjem
  • Organizer: 日本応用数里学会2008年度年会
  • Place of Presentation: 東京大学柏キャンパス
  • Year and Date: 2008-09-17
• [Presentation] The effectof non-axisymmetric flow disturbanceson the sound generation in the holetonefeedback cycle (2008)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: XXII InternationalCongress of Theoretical andApplied Mechanics (ICTAM 2008)
  • Year and Date: 2008-08-25
• [Presentation] The effect of non-axisymmetric flow disturbances on the sound generation in the holetone feedback cycle (2008)
  • Author(s): Mikael A. Langthjem
  • Organizer: XII International Congress of Theoretical and Applied Mechanics (ICTAM 2008) Lecture presentation (Session : Acoustics)
  • Place of Presentation: Adelaide, Australia
  • Year and Date: 2008-08-25
• [Presentation] A numericalstudy on the influence of non-axisymmetricflow perturbations in thehole-tone feedback problem (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: RIMS研究集会,非線形波動現象の数理と応用
  • Place of Presentation: 京都大学数理研究所
  • Year and Date: 2007-10-30
• [Presentation] Nakano, POD-basedanalysis of self-sustained flowoscillationsin the hole-tone problem (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: RIMS研究集会,非線形波動現象の数理と応用
  • Place of Presentation: 京都大学数理研究所
  • Year and Date: 2007-09-18
• [Presentation] Control ofsound generation in the hole-tonefeedback cycle by non-axi-symmetricflow perturbations (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: 日本流体力学会年会2007年度
  • Place of Presentation: 東京大学教養学部
  • Year and Date: 2007-08-07
• [Presentation] IUTAM Symposium"Unsteady Separated Flows and theirControl" (2007)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: A threedimensionalstudy into non-axisymmetricperturbations of the hole-tonefeedback cycle
  • Place of Presentation: Corfu, Greece
  • Year and Date: 2007-06-20
• [Presentation] Influenceof non-axisymmeric perturbations onthe hole-tone feedback cycle : Anumerical study (2006)
  • Author(s): M.A. Langthjem, M. Nakano
  • Organizer: Inter・Noise 2006
  • Place of Presentation: Honolulu, HI, USA
  • Year and Date: 2006-12-06