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Development of Simultaneous Non-intrusive Measurement of Size, Flowing Attitude and Velocity of Arbitrarily Shaped Particle.

Research Project

Project/Area Number 07555073
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Thermal engineering
Research InstitutionKeio University

Principal Investigator

MAEDA Masanobu  Keio University, Faculty of Science and Technology., Professor, 理工学部, 教授 (90051466)

Co-Investigator(Kenkyū-buntansha) HISHIDA Koichi  Keio University, Faculty of Science and Technology., Professor, 理工学部, 教授 (40156592)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1996: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1995: ¥4,000,000 (Direct Cost: ¥4,000,000)
KeywordsLaser technique / Non-intrusive measurement / Velocity measurement / Shape measurement / Non-spherical particle / LDV / PDA
Research Abstract

The sizing of arbitrarily shaped particles is of technical interest and accurate determination of their equivalent diameter is important, because most particles in industrial processes are non-spherical. A reliable measuring technique has been demanded for improvement of equipment with high efficiency. In general, motion of non-spherical particle in fluid is governed by drag and inertia forces. The evaluation of equivalent diameter of non-spherical particle is not relevant due to the lack of effective measuring techniques. The purpose of the present investigation is to develop the measuring technique for non-spherical particles in flow and to establish a suitable signal processing technique, which provided velocity, size shape, and attitude and trajectory of particle. The measurements were implemented with free falling flow and confined jet flow. The effect of non-sphericality on particle dispersion was presented by these experiments, and also the performance and accuracy of the presen … More t technique were confirmed by the practical application.
The present instrument consisted of a Laser Doppler Velocimeter and a receiving optics and a shadow image processor unit with a linear photo sensor array placed at the focal plane corresponding to the measuring volume. The array sampled one-dimensional slices of moving two-dimensional shadow at the pre-defined sampling frequency. The time series of the on-dimensional slices and the simultaneously measured particle velocity were used for reconstruction of the two-dimensional shadow image. From the provided shadow area the particle size was determined. Measurement accuracy of sizing was estimated at about 3% for spherical particles and 10% for non-spherical particles. The measuring system also provided spatial position of a particle traveling through the measuring volume.
The experiments in a confined jet flow with Reynolds number of 14700, in which two-component velocities, size and number density of particle were measured, indicated that the axial component of mean velocities of non-spherical particle was smaller than that of spherical particle which had a almost same terminal velocity, and that radial mean square displacement of non-spherical sarticles estimated form their number density measurements was larger than that of spherical particles. It was concluded from the results that non-spherical particle behaved differently form spherical particles in downstream of the jet, and longer resident time of non-spherical particle in the jet flow caused larger radial dispersion. Less

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 鈴木 一隆、森北 博巳、菱田 公一、前田 昌信: "軸対称噴流中の非球形粒子の拡散(第2報)" 混相流シンポジウム'97(第16回)講演論文集. 293-294 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Maeda, M.and Morikita, H.: "LDA Based Optical Particle Sizing of Spherical and Irregular Shape" Proc.of The 7th International Conference on Liquid Atomization and Spray Systems,Seoul. Vol.1. 3-21 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Morikita, K., Suzuki, K., Hishida, K. and Maeda, M.: "Disprsion of Spherical and Non-spherical Particles in a Round Jet Measured by Shadow Doppler Velocimeter" Proc.of Third International Conference on Multiphase Flow,ICMF'98,Lyon,France,1998. 発表予定. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Maeda, H.Morikita, I.Plassas, A.M.K.P.Taylor, and J.H.Whilelaw: "Shadow Doppler Velocimeter for Simultaneous Size and Velocity Measurements of Irregular Particles in Confined Reacting Flows" Particle and Particle Systems Characterization. Vol14. 79-87 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.MAEDA,H.i Morikita, I.Prassas, A.M.K.P.Taylor, and J.H.Whitelaw: "Size and Velocity Measurement by Shadow Doppler Velocimetry Within a Pulverized Coal-fired Furnace" HTD-Vol.321/FED-Vol.233,1995IMECE Proceedings of the ASME Heat Transfer and Fluids Engineering Divisions ASME. 351-360 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Maeda, H.Morikita, Ilias Prassas, A.M.K.P.Taylor and J.H.Whitelaw: "Accuracy of Particle Flux and Concentration Measurement By Shadow Doppler Velocimetry" Eighth International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal.1996 (Developments in Laser Techniques and Fluid Mechanics, Springer-Verlag, pp.233-257).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Suzuki, H Morikita, K.Hishida and M.Maeda: "Dispersion of Non-spherical Particle in Round Jet (2^<nd> Report)" Proceedings of Multiphase flow symposium of Japan. 293-294 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Maeda: "LDA Based Optical Sizing of Spherical and Irregular Shape" Proceedings of the 7^<th> International Conference on Liquid Atomization and Spray System, Seoul. 3-21 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Marikita, K.Suzuki, K..Hishida, and M.Maeda: "Dispersion of Spherical and Non-Spherical Particles in a Round Jet measured by Shadow Doppler Velocimeter" Proceedings of the Third International Conference on Multiphase flow, ICMF98, Lyon France. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 鈴木一隆、森北博巳、菱田公一、前田昌信: "軸対称噴流中の非球形粒子の拡散(第2報)" 混相流シンポジウム'97(第16回)講演論文集. 293-294 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Maeda,M.and Morikita,H.: "LDA Based Optical Particle Sizing of Spherical and Irregular Shape" Proc.of The 7th International Conference on Liquid Atomization and Spray Systems,Seoul. Vol.1. 3-21 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Morikita,K.,Suzuki,K.,Hishida,K.and maeda,M.: "Dispersion of Spherical and Non-spherical Particles in a Round Jet Measured by Shadow Doppler Velocimeter" Proc.of Third International Conference on Multiphase Flow,ICMF'98,Lyon,France,1998. (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 鈴木一隆,森北博己,菱田公一,前田昌信: "軸対称噴流中の非球形粒子の拡散" 混相流シンポジウム'96講演論文集. 125-128 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Maeda,H.Morikita,I.Parassus,A.Taylor,J.H.Whitelaw: "Shadow Doppler Velocimetry for Simultaneous Size and Velocity Measurements of Irregular Particles in Contined Reacting Flows" Part.Part.System Characterization. (未定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Maeda,H.Morikita,I.Prassas,A.M.K.P.Taylor,J.H.Whitelaw: "Size and Velocity Measurement by Shadow Doppler Velocimetry within a Pulverised Coal-Fired Fumace" ASME Forum on Measurement Techniques in Multiphase Flows. Paper 4. (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 森北博巳・A.M.K.P.Taylor・J.H.Whitelaw・菱田公一・前田昌信: "投影法レーザドップラ流速計による任意形状粒子のサイジング" 日本機械学会第72回通常総会講演論文集. (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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