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

On the Bubble Behavior and Heat Transfer Mechanism in Microbubble Emission Boiling

Research Project

Project/Area Number 09650219
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

KUMAGAI Satoshi  Department of Machine Intelligence and Systems Engineering, Tohoku University, Associate Professor, 大学院・工学研究科, 助教授 (30134026)

Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsBoiling Heat Transfer / Microbubble Emission Phenomena / Liquid Subcooling / Bubble Motion / Pressure Fluctuation / Temperature Fluctuation / Power Spectrum / 伝熱 / 沸騰 / 気泡微細化 / 気泡挙動 / 画像処理 / サブク-ル / 周波数特性 / 液体微小噴流
Research Abstract

High heat flux far exceeding CHF can be achieved in microbubble emission boiling (MEB) without a marked increase in the wall superheat from CHF under high liquid subcooling condition, accompanying a lot of microbubbles emitted from the heating surface. Those high heat flux should be considered a result of violent behavior of coalescent bubbles in that regime. A rapid collapse of a bubble which shrinks toward the heating surface induces a strong flow of subcooled liquid like a micro-jet to make steady solid-liquid contact even in the high surface temperature region. This bubble behavior generates a moment of high pressure in the vicinity of the surface. In this study, a measurement of the pressure and the temperature fluctuation in the liquid near the surface was performed synchronously with a recording of the bubble motion by a high speed video camera to look into the mechanism of the water supply to the surface and therefore the heat transfer.
The experimental results reveals that there exists a close relation among the pressure and the temperature fluctuations and the bubble motion especially the collapsing process of it. The waveform of a pressure fluctuation is a repetition of a group of peaks which consists of a first large peak and following smaller peaks. The pressure steeply increases when a bubble begins to collapse. A sharp positive large peak in the pressure fluctuation corresponds to the collapse of a bubble, and after a short delay negative peak in the temperature fluctuation is observed, indicating a liquid flow onto the surface. The peak frequencies of the power spectrums of the temperature and the pressure fluctuation as well as the bubble collapse frequency are coincident with each other and are expressed by a simple relation against heat flux, showing a higher frequency at a higher heat flux.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 熊谷哲: "水平および鉛直伝熱面から並行流サブクール水への気泡微細化沸騰"日本機械学会論文集B編. 64. 3808-3813 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Satoshi KUMAGAI: "Temperature and Pressure Fluctuation Associated with Bubble Motion in Microbubble Emission Boiling"Proc.11th International Heat Transfer Conference. 2. 279-284 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 熊谷哲: "気泡微細化沸騰における気泡の挙動"日本機械学会論文集B編. 65. 296-300 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 熊谷哲: "気泡微細化沸騰における圧力変動特性"日本機械学会論文集B編. 65. 1055-1060 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Satoshi KUMAGAI: "Void Fracrion Behavior in the Vicinity of the Surface in Microbubble Emission Boiling"Proc. 5th ASME/JSME Termal Engineering Joint Conference. 2. AJTE99-6430 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 熊谷哲: "鉛直平面からの気泡微細化沸騰における気泡の挙動と圧力変動"日本機械学会論文集B編. 65. 1383-1388 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. KUMAGAI, R. KUBO, and M. Kawasaki: "Microbubble Emission Boiling from Horizontal and Vertical Surfaces to Subcooled Flow Water"Transaction of the Japan Society of Mechanical Engineers. 64-627. 3808-3813 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Kumagai, K. Kawabata, T. Katagiri and R. Shimada: "Temperature and Pressure Fluctuation Associated with Bubble Motion in Microbubble Emission Boiling"Proc. 11th International Heat Transfer Conference. Vol. 2. 279-284 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. KUMAGAI and R. KUBO: "Bubble Motion in Microbubble Emission Boiling"Transaction of the Japan Society of Mechanical Engineers. 65-629. 296-300 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. KUMAGAI and M. Kawasaki: "Pressure Fluctuation in Microbubble Emission Boiling"Transaction of the Japan Society of Mechanical Engineers. 65-631. 1055-1060 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Kumagai, T. Uhara, T. Nakata and M. Izumi: "Void Fracrion Behavior in the Vicinity of the Surface in Microbubble Emission Boiling"Proc. 5th ASME/JSME Thermal Engineering Joint Conference. AJTE99-6430 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Kumagai, K. Kawabata, H. Yoshikawa and R. Shimada: "Bubble and Pressure Fluctuation in Microbubble Emission Boiling from a Vertical Surface"Transaction of the Japan Society of Mechanical Engineers. 65. 1383-1388 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 熊谷,川崎: "気泡微細化沸騰における圧力変動特性"日本機械学会論文集B編. 65巻631号. 1055-1060 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kumagai,Uhara,Nakata,Izumi: "Void Fraction Behavior in the Vicinity of the Surface in Microbubble Emission Boiling"Proc. 5th ASME/JSME Thermal Engineering Joint Conference. AJTE99-6430 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 熊谷,川端,吉川,島田: "鉛直平面からの気泡微細化沸騰における気泡の挙動と圧力変動"日本機械学会論文集B編. 65巻632号. 1383-1388 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 久保,熊谷,梅原: "気泡微細化沸騰における伝熱面の壊食"日本機械学会論文集B編. 65巻633号. 1731-1736 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 兎原・熊谷: "気泡微細化沸騰における気泡挙動と個液接触" 第35回日本伝熱シンポジウム講演論文集. 1巻. 165-166 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kumagai,Kawabata,他2名: "Temperature and Pressure Fluctuation Associated with Bubble Motion in Microbubble Emission Boiling" Proc. 11th International Heat Transfer Conference. Vol.2. 279-284 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 熊谷・泉・村田: "気泡微細化沸騰における気泡の挙動と熱伝達の機構" 日本機械学会熱工学講演会講演論文集. No.98-7. C-232 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 熊谷・久保・川崎: "水平および鉛直伝熱面から並行流サブクール水への気泡微細化沸騰" 日本機械学会論文集B編. 64巻627号. 3808-3813 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 熊谷・久保: "気泡微細化沸騰における気泡の挙動" 日本機械学会論文集B編. 65巻629号. 296-300 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 片桐・熊谷・島田: "気泡微細化沸騰における気泡の挙動と温度変動" 日本伝熱シンポジウム講演論文集. 1巻. 287-288 (1998)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi