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Heat transfer mechanism and thermal performance of a channel with square-wing perforated transverse baffles installed: effect of square-wing location

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Abstract

The aim of this study is to report the influence of wing position (h/e) of perforated transverse baffles with square-wings (SW-PBs) on heat transfer rate and pressure drop characteristics in a channel. The channel has a cross-sectional dimension of 15 cm × 4 cm and a length of 60 cm. Two types of baffles: Solid transverse baffles and square-wing perforated transverse baffles, are comparatively tested. The baffle pitch ratio (p/e) is set to 5.0 and remains constant throughout all experiments which encompass Reynolds numbers (Re) of 6000, 9000, 12,000, 15,000, 18,000, 21,000, and 24,000. Square-wings are introduced at four different locations, h/e = 0.92 (highest wing location), 0.83, 0.75, and 0.67 (lowest wing location). The maximum heat transfer rates achieved in channels with SW-PBs at h/e = 0.92, 0.83, 0.75, and 0.67 are 148%, 157%, 166%, and 180% above that of a plain channel, while pressure losses increase by 9.51–10.69, 9.56–10.79, 9.59–10.86, and 9.64–10.99 times, respectively. Experimental results show that square-wings create multiple impinging jet flows and Nusselt number peaks appear adjacent to the rear of the perforated transverse baffles. When compared to solid transverse baffles, SW-PBs cause lower pressure losses and yield higher thermal performance.

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Author information

Authors and Affiliations

  1. Division of System Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan

    Smith Eiamsa-Ard

  2. Department of Mechanical Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand

    Smith Eiamsa-Ard & Arnut Phila

  3. Department of Mechanical Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

    Monsak Pimsarn

  4. Engineering Innovation Unit, Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, 514-8507, Japan

    Naoki Maruyama

  5. Division of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan

    Naoki Maruyama & Masafumi Hirota

Authors
  1. Smith Eiamsa-Ard
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  2. Arnut Phila
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  5. Masafumi Hirota
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Correspondence to Smith Eiamsa-Ard.

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Eiamsa-Ard, S., Phila, A., Pimsarn, M. et al. Heat transfer mechanism and thermal performance of a channel with square-wing perforated transverse baffles installed: effect of square-wing location. J Therm Anal Calorim 148, 3835–3849 (2023). https://doi.org/10.1007/s10973-022-11937-w

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