measurement of amplitude modulation and dispersive effect of nonlinear resonant oscillations

• Project/Area Number: 20760103
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Fluid engineering
• Research Institution: Hokkaido University
• Principal Investigator: KURIHARA Eru Hokkaido University, 大学院・工学研究科, 助教 (90344481)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 音響 / 非線形音波 / 衝撃波 / 分散性 / 共鳴

Research Abstract

Measurement of dispersion effect of resonant cylindrical waves is performed by using the cylindrical transducer. The amplitude modulation due to the dispersive effect of the resonant gas oscillations was found through the experiment. Spatial distribution of the resonant wave was observed by the particle in the resonator. The experiment revealed that the dispersion effect associated with the amplitude modulations. Since the period of the modulation is consistent with the results of both theoretical and numerical analysis, the presence of the dispersion effect resulting from the geometry of the sound field was shown experimentally.

Research Products

• [Presentation] 円筒音波の非線形共鳴現象における振幅変調計測 (2009)
  • Author(s): 栗原央流
  • Organizer: 日本流体力学会年会2009
  • Place of Presentation: 東洋大学(東京都文京区)
  • Year and Date: 2009-09-03
• [Presentation] Nonlinear analysis of resonant sound wave excited in an elliptical cylinder (2008)
  • Author(s): T. Kanagawa, E. Kurihara
  • Organizer: 7th JSME-KSME Thermal and Fluids Engineering Conference
  • Place of Presentation: Sapporo
  • Year and Date: 2008-10-15
• [Presentation] Nonlinear analysis of resonant sound wave excited in an elliptical cylinder (2008)
  • Author(s): T. Kanagawa
  • Organizer: 7th JSME-KSME Thermal and Fluids Engineering Conference
  • Place of Presentation: 北海道立道民活動センターかでる27(札幌市)
  • Year and Date: 2008-10-15
• [Presentation] Numerical simulation of nonlinear resonant oscillations in an elliptical cylinder (2008)
  • Author(s): E. Kurihara
  • Organizer: 18th International Symposium on Nonlinear Acoustics
  • Place of Presentation: Stockholm, Sweden
  • Year and Date: 2008-06-19
• [Presentation] Numerical simulation of nonlinear resonant oscillations in an elliptical cylinder (2008)
  • Author(s): E. Kurihara
  • Organizer: 18th International Symposium on Nonlinear Acou stics
  • Place of Presentation: スウェーデン王立工科大学・ストックホルム・スウェーデシ
  • Year and Date: 2008-06-19