Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures

Beibei Shen; Yang Li; Hongbin Yan; Sandra K.S. Boetcher; Gongnan Xie

doi:10.1016/j.ijheatmasstransfer.2019.06.059

Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures

Beibei Shen, Yang Li, Hongbin Yan, Sandra K.S. Boetcher, Gongnan Xie

School of Marine Science and Technology

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

This study introduces Kagome lattice structures to replace pin fins or ribs in a wedge-shaped channel, which represents a turbine-blade trailing edge, for heat transfer enhancement. Present simulation methods are verified against available experimental data. The local and overall thermo-fluidic characteristics of the four designed channels, at five Reynolds numbers and a given porosity, are investigated numerically and compared. The results reveal that the proposed structures exhibit 6–71% higher overall Nusselt numbers relative to the original structure but with similar pressure loss. The heat transfer enhancement is attributed to the fact that the first array of Kagome cores separates more high momentum fluid to the tip region, which results in the reduction of recirculation and increases convective heat transfer.

Original language	English
Pages (from-to)	88-101
Number of pages	14
Journal	International Journal of Heat and Mass Transfer
Volume	141
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2019.06.059
State	Published - Oct 2019

Keywords

Flow characteristics
Heat transfer enhancement
Kagome cores
Pin fins
Trailing edge

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10.1016/j.ijheatmasstransfer.2019.06.059

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title = "Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures",

abstract = "This study introduces Kagome lattice structures to replace pin fins or ribs in a wedge-shaped channel, which represents a turbine-blade trailing edge, for heat transfer enhancement. Present simulation methods are verified against available experimental data. The local and overall thermo-fluidic characteristics of the four designed channels, at five Reynolds numbers and a given porosity, are investigated numerically and compared. The results reveal that the proposed structures exhibit 6–71% higher overall Nusselt numbers relative to the original structure but with similar pressure loss. The heat transfer enhancement is attributed to the fact that the first array of Kagome cores separates more high momentum fluid to the tip region, which results in the reduction of recirculation and increases convective heat transfer.",

keywords = "Flow characteristics, Heat transfer enhancement, Kagome cores, Pin fins, Trailing edge",

author = "Beibei Shen and Yang Li and Hongbin Yan and Boetcher, {Sandra K.S.} and Gongnan Xie",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = oct,

doi = "10.1016/j.ijheatmasstransfer.2019.06.059",

language = "英语",

volume = "141",

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journal = "International Journal of Heat and Mass Transfer",

issn = "0017-9310",

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TY - JOUR

T1 - Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures

AU - Shen, Beibei

AU - Li, Yang

AU - Yan, Hongbin

AU - Boetcher, Sandra K.S.

AU - Xie, Gongnan

PY - 2019/10

Y1 - 2019/10

N2 - This study introduces Kagome lattice structures to replace pin fins or ribs in a wedge-shaped channel, which represents a turbine-blade trailing edge, for heat transfer enhancement. Present simulation methods are verified against available experimental data. The local and overall thermo-fluidic characteristics of the four designed channels, at five Reynolds numbers and a given porosity, are investigated numerically and compared. The results reveal that the proposed structures exhibit 6–71% higher overall Nusselt numbers relative to the original structure but with similar pressure loss. The heat transfer enhancement is attributed to the fact that the first array of Kagome cores separates more high momentum fluid to the tip region, which results in the reduction of recirculation and increases convective heat transfer.

AB - This study introduces Kagome lattice structures to replace pin fins or ribs in a wedge-shaped channel, which represents a turbine-blade trailing edge, for heat transfer enhancement. Present simulation methods are verified against available experimental data. The local and overall thermo-fluidic characteristics of the four designed channels, at five Reynolds numbers and a given porosity, are investigated numerically and compared. The results reveal that the proposed structures exhibit 6–71% higher overall Nusselt numbers relative to the original structure but with similar pressure loss. The heat transfer enhancement is attributed to the fact that the first array of Kagome cores separates more high momentum fluid to the tip region, which results in the reduction of recirculation and increases convective heat transfer.

KW - Flow characteristics

KW - Heat transfer enhancement

KW - Kagome cores

KW - Pin fins

KW - Trailing edge

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M3 - 文章

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JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

ER -

Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures

Abstract

Keywords

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