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Heat Transfer, Relationship Between Erosion and Particle Cluster in the Multiphase Flow

Research Project

Project/Area Number 06650251
Research Category

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

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionYamaguchi University

Principal Investigator

KATOH Yasuo  Yamaguchi University, Mechanical Engineering, Associate Professor, 工学部, 助教授 (50152749)

Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥900,000 (Direct Cost: ¥900,000)
KeywordsMULTIPHASE FLOW / FLUIDIZED BED / EROSION / PARTICLE CLUSTER / HEAT TRANSFER / VISUALIZATION / HIGH SPEED VIDEO / IMAGE ANALYSIS
Research Abstract

In order to know the heat transfer, relationship between erosion and particle cluster in the multiphase Flow (namely circulating fluidized bed (CFB) ) , the typical approach on the image processing of the image data such as spatial filtering method (SFM) for estimating of the particle velocity and the heat transfer mechanism from a fine wire to a particle for measuring the heat transfer coefficient around a horizontal fine platinum wire, which was heated electrically in a CFB,has been done experimentally.
[1] Image analysis for estimating of the particle velocity in a CFB,
(1) The clear and local particle velocity distributions for the various superficial gas velocity and the various circulating particle flow rate were obtained.
(2) The characteristics of particle flow varied with the change of the superficial gas velocity and the change of the circulating particle flow rate in this fluidization region (fast fluidization region).
(3) The particle velocity distribution obtained by SFM with … More the mean particle velocity from the measuring particle hold-up and with the particle velocity distributions obtained by optical fiber cross-correlation method and also with the velocity distribution obtained by eye observation were compared. Those values agreed very well each others in the experimental conditions.
(4) The applied limitation of this SFM for measuring the particle velocity was obtained the particle velocity only below the value of the above equation in density.
[2] Heat transfer mechanism in a CFB
(1) The relationship between the particle behavior and the characteristics of heat transfer around a horizontal fine wire in CFB was influenced by the flow patterns such as the turbulent fluidization and the dilute fluidization.
(2) This mechanism also influenced by the particle density which coincided with the particle packing ratio. In the turbulent fluidization region, the heat transfer coefficient for dp<dw was larger than that for dp>dw.
(3) The relationship between the gas velocity and the characteristics of heat transfer around a horizontal fine wire in the dilute fluidization. This seemed to be the reason why the heat transfer coefficients were the something effects by the difference of direct contact area between the particle and the fine wire which corresponded to the ratio of the particle size to the fine wire size roughly. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 加藤泰生: "循環流動層内流路中央断面における粒子速度のSFM画像処理計測" 日本可視化情報学会誌. 15. 89-92 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y. Katoh: "Characteristics of heat trasnsfer around a horizontal thin wire in solid-air mixed flow" Proc. of 1995 ASME/JSME Thernnal Engineering. 2. 471-476 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 加藤泰生: "循環流動層内粒子挙動と熱伝達に関する研究" 山口大学工学部 研究報告. 45-2. 15-20 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 加藤泰生: "SFM法による画像処理計測“混相流体内粒子速度分布計測への適用"" 画像ラボ・日刊工業. 7. 22-24 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y. Katoh: "Image Analysis with SFM for the Particle Velocity Distributions in a circulating Fluidized Bed. (to be presented)" Proc. of Asian Symposium, Visualization '96. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 加藤泰生: "循環流動層内水平細線まわりの熱伝達特性について" 機械学会・中・中国・九州連合講演会講演論文集. No. 955-2. 155-156 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Katoh et al.: "SFM image analysis on particle velocity distributions in a center cross sectional area of circulating fluidized bed" Journal of the visualization society of japan. Vol.15. 89-92 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Katoh et al.: "Characteristics of heat transfer around a horizontal thin wire in a solid-air mixed flow" Proc.of 1995 ASME/JSME Thermal Engineering. Vol.2. 471-476 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Katoh et al.: "A study on the relationship between particle behavior and heat transfer in a circulating fluidized bed" Yamaguchi Univ.Tech.Report. Vol.45-2. 15-20 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Katoh et al.: "Image analysis using SFM -Application for measuring of particle velocity distributions-, Image Lab." Nikkan Kogyo. Vol.7. 22-24 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Katoh et al.: "Image Analysis with SFM for the Particle Velocity Distributions in a circulating fluidized bed" Proc.of Asian Symposium, Visualization '1996. (to be presented.).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Katoh et al.: "Heat transfer around a thin wire in a circulating fluidized bed" Proc.of Mechanical engineering national meeting (Chu-Sikoku District). No.955-2. 155-156 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 加藤 泰生: "循環流動層流路中央断面における粒子速度のSFM画像処理計測" 日本可視化情報学会誌. Vol.15. 89-92 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Katoh: "Characteristics of heat transfer around 〜 horizontal thin wire in solid-air mixed flow" Proc.of 1995 ASME/JSME Thermal Engineering. 2. 471-476 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 加藤 泰生: "循環流動層内粒子挙動と熱伝達に関する研究" 山口大学工学部研究報告. 45-2. 15-20 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 加藤 泰生: "SFM法による画像処理計測混相流体内粒子速度分布計測への適用" 画像ラボ(日刊工業). 7. 22-24 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Katoh: "Image Analysis with SFM for the Particle Velouty Distributions in a Circulating Fluidized Bed," Proc.of Asian Symposium,Visualization '96. (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 加藤 泰生: "循環流動層内水平細線まわりの熱伝達特性について" 機械学会中四国九州連合講演会講演論文集. No.955-2. 155-156 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.KATOH et.al.: "Flow characteristics of fluidized particles in a riser" FLUIDIZATION'94. 1. 143-149 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤泰生 他: "混相上昇流内粒子速度の空間フィルター法による画像処理計測" 第22回可視化シンポジウム講演論文集. Suppl.1. 23-26 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤泰生 他: "循環流動層内粒子速度の画像処理計測の一例" 第1回循環流動層シンポジウム講演論文集. 1. 93-96 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤泰生 他: "空間フィルター法による循環流動層内粒子の速度計測" 日本機関学会中・四国支部講演論文集No.955-1. 69-70 (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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