• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Mechanisms for the generation of self-excited traveling waves in thermoacoustic engines

Research Project

Project/Area Number 25820044
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Fluid engineering
Research InstitutionFukui University of Technology (2014)
Osaka University (2013)

Principal Investigator

SHIMIZU DAI  福井工業大学, 工学部, 准教授 (40448048)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords熱音響自励振動 / 境界層理論 / 臨界条件 / 進行波 / スタック / 空隙率 / 熱音響エンジン / ループ管 / 熱交換器
Outline of Final Research Achievements

Numerical simulations of self-excited thermoacoustic oscillations in a looped tube are performed based on the one-dimensional theory in the boundary-layer approximation. Effects of porosity and other sub-parameters of the so-called stack on the generation of traveling waves are studied. It is found that the generation of traveling waves is enhanced as the porosity decreases when the wall thickness of the stack is constant. Thinner wall thickness of the stack is also effective for the generation of traveling waves when the porosity is constant. It is also found that these results become opposite for the porosity below around 0.5. It is unveiled that not only the common parameter omega tau but also the porosity of the stack and other sub-parameters are important for the specification of marginal temperature ratios and for the generation of traveling waves. The boundary-layer theory has turned out to be applicable even to the case with apparently narrow pores in the stack.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (9 results)

All 2015 2014 2013 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (6 results) (of which Invited: 1 results) Remarks (1 results)

  • [Journal Article] Determination of marginal conditions for thermoacoustic oscillations in a looped tube by evolution of an initial disturbance based on the boundary-layer theory2014

    • Author(s)
      Shimizu, D. & Sugimoto, N.
    • Journal Title

      J. Phys. Soc. Japan

      Volume: 83 Issue: 3 Pages: 03440301-9

    • DOI

      10.7566/jpsj.83.034403

    • NAID

      210000132996

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical simulations of a transient behavior in the onset of thermoacoustic marginal oscillations in a looped tube2013

    • Author(s)
      Dai Shimizu and Nobumasa Sugimoto
    • Journal Title

      Acoustical Society of America Proceedings of Meetings on Acoustics

      Volume: POMA Vol. 19, No. 1 Pages: 0450851-5

    • DOI

      10.1121/1.4799368

    • NAID

      130004604992

    • Related Report
      2013 Research-status Report
  • [Presentation] 熱音響ソリトンの発生実験2015

    • Author(s)
      清水 大
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学 早稲田キャンパス
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] 熱音響自励振動の発生メカニズムの解明~タコニス振動から熱音響ソリトンまで~2015

    • Author(s)
      清水 大
    • Organizer
      平成26年度 第3回応用熱音響研究会
    • Place of Presentation
      東海大学 代々木キャンパス
    • Year and Date
      2015-03-21
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] 熱音響現象と新しい熱機関への応用2014

    • Author(s)
      清水 大
    • Organizer
      機械学会北陸信越支部特別講演会
    • Place of Presentation
      福井工業大学 福井キャンパス
    • Year and Date
      2014-12-12
    • Related Report
      2014 Annual Research Report
  • [Presentation] 非線形熱音響振動の発生と大振幅化に向けた実験2014

    • Author(s)
      杉本 信正
    • Organizer
      第38回非線形音響研究会
    • Place of Presentation
      加藤山崎教育基金 軽井沢研修所
    • Year and Date
      2014-07-26 – 2014-07-27
    • Related Report
      2014 Annual Research Report
  • [Presentation] Experiments of nonlinear thermoacoustic oscillations in a straight tube and effects of Helmholtz resonators on suppression of higher harmonics2014

    • Author(s)
      Dai SHIMIZU
    • Organizer
      The Second International Workshop on Thermoacoustics
    • Place of Presentation
      Sakura Hall, Tohoku University
    • Year and Date
      2014-05-23 – 2014-05-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] 直管における非線形熱音響振動の実験2013

    • Author(s)
      清水大,服部佑規,杉本信正
    • Organizer
      日本流体力学会年会2013
    • Place of Presentation
      東京農工大学 小金井キャンパス
    • Related Report
      2013 Research-status Report
  • [Remarks] 大阪大学研究者総覧

    • URL

      http://www.dma.jim.osaka-u.ac.jp/view?l=ja&u=4615

    • Related Report
      2013 Research-status Report

URL: 

Published: 2014-07-25   Modified: 2019-07-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi