Effect on Heat Transfer Augmentation of Some Geometric Shapes of a Turbulence Promoter in a Rectangular Duct

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概要

• 論文の詳細を見る

• This paper investigates how the local heat transfer coefficient is affected by geometric shape and the clearance "C", when turbulence promoters of various types (blockage ratio D/2H=0.22) are set in staggered arrangement in a rectangular duct in order to augment heat transfer from the wall. The distribution of local heat transfer coefficients depends on the clearance "C", which can be further differentiated by the presence or absence of the Karman vortex shedding. The degree of augmentation is also analysed, taking account of the pressure loss. It is found that the performance ratio η(the ratio of average heat transfer for the present system to that for a smooth duct under the condition of equivalent pumping power) is larger than unity for all types, when the range of clearance "C" is smaller than 3 mm.

• 一般社団法人日本機械学会の論文

著者

• Oyakawa Kenyu

  Faculty Of Engineering Ryukyu University

• Oyakawa Kenyu

  Faculty Engineering Ryukyu University

• MABUCHI Ikuo

  Faculty of Engineering, Gifu University

• SHINZATO Takao

  Faculty of Engineering, Ryukyu University

• Shinzato Takao

  Faculty Of Engineering Ryukyu University

• Mabuchi Ikuo

  Faculty Of Engineering Gifu University

• Mabuchi Ikuo

  Faculty Engineering Gifu University

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