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EFFECTS OF NEIGHBORING BLADE ROW ON SUPERSONIC CASCADE FLUTTER

Research Project

Project/Area Number 13650964
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Aerospace engineering
Research InstitutionSojo University

Principal Investigator

NAMBA Masanobu  SOJO UNIVERSITY, AEROSPACE SYSTEMS ENGRO., PROFESSOR, 工学部, 教授 (50037735)

Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsUNSTEADY AERODYNAMICS / AEROELASTICITY / FLUTTER / CASCADE / CONTRA-ROTATING CASCADES / BLADE ROW INTERACTION / AEROACOUSTICS / UNSTEADY LIFTING SURFACE THEORY / 動静翼列干渉 / 非定常学
Research Abstract

An unsteady lifting surface theory was developed for contra-rotating annular blade rows with vibrating blades. A program was coded to compute unsteady aerodynamic force and work on blades for specified frequency, inter-blade phase angle and other design parameters. The program is comprehensive, and it can deal with various combinations of blade rows, i.e., combinations of subsonic and subsonic blade rows, supersonic and supersonic blade rows, and subsonic and supersonic blade rows. The validity of the program was confirmed by making a comparison for a model condition between the results from the present program and those of CFD Euler code computation conducted by Professor K.C.Hall of Duke University. Both results were in complete agreement.
Parametric studies were conducted to investigate the influence of the neighboring blade rows on unsteady loading caused by blade vibration.
A computation program was coded to determine the critical condition of occurrence of coupled bending-torsion f … More lutter, which utilizes the above mentioned program as a subprogram to calculate unsteady aerodynamic force terms in flutter equations. The influence of the neighboring blade row on the flutter boundaries was investigated.
New findings are summarized as follows.
(1)Vibrating subsonic blade row : Unsteady aerodynamic work on vibrating blades, critical flutter velocity, critical flutter frequency and flutter mode are substantially influenced by the presence of a neighboring blade row in cases where the fundamental acoustic duct mode generated from the vibrating blade row is cut-on. On the other hand in cases where the fundamental acoustic duct mode is cut-off, the influence of the neighboring blade row is essentially small unless the blade row gap is very small.
(2)Vibrating supersonic blade row : Unsteady aerodynamic work on vibrating blades, critical flutter velocity, critical flutter frequency and flutter mode are very sensitive to parametric change near the resonance points of low order acoustic duct modes. The behaviors of the variations with the parametric change are heavily influenced by the presence of the neighboring blade row. Less

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report

Research Products

(19 results)

All Other

All Publications

  • [Publications] 難波昌伸, 西野竜平: "Flutter Analysis of Annular Cascades in Counter Rotation"Proceedings of Asian Joint Conference on Propulsion and Power 2004. (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 難波昌伸: "Unsteady Aerodynamic Work on Oscillating Annular Cascades in Counter Rotation"Proceedings of 10^<th) International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 難波昌伸: "Recent Findings of Analytical Studies in Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines"Proceedings of International Gas Turbine Congress 2003 Tokyo. IGTC2003 Tokyo KS-6. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 難波昌伸: "What is the Role of Analytical Methods in Modern Unsteady Aerodynamics of Turbomachines"Proceedings of 9^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. 12-23 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 難波昌伸, 山崎伸彦, 西村伸一: "Unsteady Aerodynamic Force on Oscillating Blades of Contra-Rotating Annular Cascades"Proceedings of 9^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. 375-386 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 難波昌伸: "Unsteady Aerodynamic Response of Oscillating Supersonic Annular Cascades in Counter Rotation"AIAA Meeting Papers on Disk : The 37^<th> AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Vol.6, No.3. (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masanobu NAMBA, Ryohei NISHINO: "Flutter Analysis of Annular Cascades in Counter Rotation"Proceedings of Asian Joint Conference on Propulsion and Power. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masanobu NAMBA: "Unsteady Aerodynamic Work on Oscillating Annular Cascades in Counter Rotation"Proceedings of 10^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masanobu NAMBA: "Recent Findings of Analytical Studies in Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines"Proceedings of International Gas Turbine Congress 2003 Tokyo. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masanobu NAMBA: "What is the Role of Analytical Methods in Modern Unsteady Aerodynamics of Turbomachines"Proceedings of 9^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. 12-23 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masanobu NAMBA, Nobuhiko YAMASAKI, Shinichi NISHIMURA: "Unsteady Aerodynamic Force on Oscillating Blades of Contra-Rotating Annular Cascades"Proceedings of 9^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. 375-386 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masanobu NAMBA: "Unsteady Aerodynamic Response of Oscillating Supersonic Annular Cascades in Counter Rotation"AIAA Meeting Papers on Disk : The 37^<th> AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Vol.6, No.3. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 難波昌伸: "Unsteady Aerodynamic Work on Oscillating Annular Cascades in Counter Rotation"Proceedings of 10^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 難波昌伸: "Recent Findings of Analytical Studies in Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines"Proceedings of International Gas Turbine Congress 2003 Tokyo. IGTC2003 Tokyo Ks-6. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 難波昌伸, 西野竜平: "Flutter Analysis of Annular Cascades in Counter Rotation"Proceedings of Asian Joint Conference on Propulsion and Power 2004. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 山崎伸彦, 浜辺正昭, 難波昌伸: "Unsteady Aerodynamic Forces on Vibrating Annular Cascade Blades -Cross Validation of the Linear unsteady CFD Calculations Using the TVD Scheme and the Double Linearization Theory"Proceedings of ASME Turbo Expo 2002. GT2002・30307. 1-10 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 難波昌伸: "What is the Role of Analytical Methods in Modern Unsteady Aerodynamics of Turbomachines?"Proceedings of the 9^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines : Presse Universitaires de Grenoble. 12-23 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 難波昌伸, 山崎伸彦, 西村伸一: "Unsteady Aerodynamic Force on Oscillating Blades of Contra-Rotating Annular Cascades"Proceedings of the 9^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines : Presse Universitaires de Grenoble. 375-386 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 難波昌伸: "Unsteady Aerodynamic Response of Oscillating Supersonic Annular Cascades in Counter Rotation"AIAA Meeting Papers on Disk : the 37^<th> AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Vol.6, No.3. (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-03-31   Modified: 2016-04-21  

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