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Dynamic Estimating measurement of Instantaneous Flow Rate Using Automatically Generated Fluid Line Model.

Research Project

Project/Area Number 60550167
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 機械力学・制御工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

HAKOMORI Kyojiro  Tohoku University, Faculty of Engineering, Professor, 工学部, 教授 (20005242)

Co-Investigator(Kenkyū-buntansha) IZAWA Yoshiaki  Tohoku University, Faculty of Engineering, Research Associate, 工学部, 助手 (00143016)
YOSHII Kazuo  Tohoku University, Faculty of Engineering, Research Associate, 工学部, 助手 (70108463)
UCHIYAMA Masaru  Tohoku University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30125504)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1985: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsUnsteady Flow Rate Measurement / Fluid Line Dynamical Model / Distributed-parameter System / Finite Element Method / Extended Kalman Filter / Flow Velocity Profile / Beam Scanning Laser Doppler Velocimeter / 助走区間内流れ
Research Abstract

The aim of this study is to extend the application area of the measuring method of instantaneous flow rate in a pipe through model-based estimation of velocity profiles to more general cases, where the analytical model of fluid lines is unknown or hard to know, by establishing a method to generate the fluid line model automatically in effective combination with approaches by beam scanning LDV, which leads to realization of a precision instantaneous flowmeter.
The summary of the results is as follows:
1. Finite element method to derive lumped-parameter models of fluid lines was introduced.
2. Two kinds of automatic generation method of fluid line models, each has features in derivation process of a linearized dynamical model including a set of unknown parameters, has been proposed. Simultaneous estimation of velocity profiles and value of the model parameters are executed using extended Kalman filering technique from flow velocity data at representative points in the cross-sectional area of the fluid line.Some problems, such as necessary number and optimum arrangement of the points and fitness of the model to flow boundary conditions, are also examined.
3. Beam scanning LDV and flow signal generating system have been improved.
4. A flow simulator, as numerical experiments, for the unsteady laminar pipe/duct flow by finite difference method has been developed.
5. By applying the proposed method of item 2 to the measurement of unsteady laminar flow over the whole entrance region in a circular pipe, and comparing the estimated velocity profiles with the experimental results from items 3 and 4, the methods are proved to be effective.
6. Extension of the method to rectangular duct flows was made and confirmed experimentally.
7. Next step is to apply the method to turbulent or laminar-turbulent flows.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 内山勝ほか: 第25回計測自動制御学会学術講演会予稿集,No.JS57-1. 621-622 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 劉凡ほか: 計測自動制御学会第4回流体計測シンポジウム資料. 89-92 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] F.Liuほか: 第26回計測自動制御学会学術講演会. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 箱守京次郎ほか: 第30回自動制御連合講演会. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] F, Liu and two others: "Derivation of Fluid Line Dynamical Models Using Finite Element Method" Preprint of SICE Tohoku Branch 96th Research Meeting. 96-5. 1-10. (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T. Kobayashi and three others: "Real Time Measurement of Transient Flow Velocity Profiles in a Pipe Using Beam Scanning Laser Doppler Velocimeter" Proceedings of the 24th SICE Annual Conference. 97-98. (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] F. Liu and two others: "Derivation of Fluid Line Dynamical Models Using Finite Element Method" Proceedings of the 28th Joint Automatic Control Conference. 29-30. (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] C. Su and two others: "Linear Dynamic Modeling of Fluid Flow in the Inlet Region of a Circular Pipe and Estimation of Its Velocity Profiles" Preprint of SICE Tohoku Branch 98th Research Meeting. 98-1. 1-14. (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] F. Liu and two others: "Derivation of Finite-dimensional Nonlinear Models for Unsteady Laminar Flows in the Inlet Region" Proceedings of SICE 8th Dynamical System Theory Symposium. 141-146. (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] M. Uchiyama and two others: "A Linear Estimator of Unsteady Flow Velocity Profiles in the Inlet Region of a Circular Pipe," Proceedings of the 25th SICE Annual Conference. 621-622. (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] F. Liu and two others: "Estimation of Transient Flow Velocity Profiles in the Entrance Region of a Circular Pipe" Proceedings of SICE 4th Symposium on Fluid Measurement. 89-92. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] F. Liu and two others: "Estimation of Transient Flow Velocity Profiles in the Entrance Region of a Rectangular Duct" The 26th SICE Annual Meeting. (1987.)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Hakomori and five others: "Random Access Beam Scanning Laser Doppler Velocimeter and Its Applications," The 30th Joint Automatic Control Conference. (1987.)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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