切欠きフィン付設流路内の熱流動特性  [in Japanese] Flow and Heat Transfer Characteristics of a Channel with Cut-Fins  [in Japanese]

Search this Article

Author(s)

Abstract

Square shape notches were applied to a parallel fin array, referred to as "cut-fin", for the purpose of enhancing the fluid mixing and heat transfer, and also reducing the pressure loss penalty. Three-dimensional numerical simulation, velocity measurement and heat transfer experiment were carried out for a rectangular channel with cut-fins mounted on the bottom wall, and the notch size and spanwise fin pitch effects on the fin performances were evaluated under laminar flow condition. In the cut-fin case, although the heat transfer area was reduced, a comparable heat transfer performance to the notch-less plain-fin case was obtained. The notch size did not largely affect the overall heat transfer performance due to the trade-off problem between the heat transfer coefficient at fin sidewalls and the extended heat transfer area. Reduction of the friction loss was also achieved in this case, indicating an increase of the total performance. An optimum value of the fin pitch in minimizing the fin thermal resistance was found and the value of the cut-fin case was smaller than that of the plain-fin case. As the Reynolds number, Re, was increased in the range of 1000⪇Re≤2000, heat transfer coefficient remained constant in the plain-fin case but increased in the cut-fin case.

Journal

  • Transactions of the Japan Society of Mechanical Engineers B

    Transactions of the Japan Society of Mechanical Engineers B 73(731), 1464-1471, 2007-07-25

    The Japan Society of Mechanical Engineers

References:  15

Cited by:  1

Codes

  • NII Article ID (NAID)
    110006367694
  • NII NACSIS-CAT ID (NCID)
    AN00187441
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03875016
  • NDL Article ID
    8902709
  • NDL Source Classification
    ZN11(科学技術--機械工学・工業)
  • NDL Call No.
    Z16-109
  • Data Source
    CJP  CJPref  NDL  NII-ELS 
Page Top