Flow Pattern at Critical Heat Flux Condition of Forced Convection Boiling in Uniformly Heated Vertical Tubes

• YOKOYA Sadao

  "Dept. of Mech. Eng., The Univ. of Tokyo"

• WATANABE Makoto

  "Dept. of Mech. Eng., The Univ. of Tokyo"

• SHOJI Masahiro

  "Dept. of Mech. Eng., The Univ. of Tokyo"

Bibliographic Information

Other Title

• B133 一様加熱垂直円管内の強制流動沸騰限界熱流束における流動状況
• イチヨウ カネツ スイチョク エンカンナイ ノ キョウセイ リュウドウ フット

Abstract

Critical heat flux (CHF) of a uniformly heated tube usually occurs at the tube exit but is sometimes detected at an upstream location under high mass flux at high system pressure. To clarify the characteristics of upstream CHF, systematic experiments were conducted using R115 as the test fluid over wide experimental ranges of system pressure, mass flux, tube length and liquid inlet subcooling. As the inner surface roughness of the test tube was found to have a strong influence on the CHF, three test tubes with different inner surface finishes were used. Flow pattern at the tube exit is observed to find that upstream CHF is caused by the liquid film break on a heated surface while regular downstream CHF by the liquid film consumption of dryout type.

Journal

• Journal of the Visualization Society of Japan

  Journal of the Visualization Society of Japan 17 (Supplement2), 153-156, 1997

  The Visualization Society of Japan

Details

• CRID: 1390001204620133120
• NII Article ID: 10002675170
• NII Article ID: 130003648745
• NII Book ID: AN10374478
• DOI: 10.3154/jvs.17.supplement2_153
• ISSN: 1884037X
• ISSN: 09164731
• NDL BIB ID: 4302652
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4302652
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed