Numerical analysis on the shape of ribs for enhancing heat transfer in matrix channel

Hyoung Min Lee, Seok Min Choi, Minho Bang, Taehyun Kim, Won-Gu Joo, Hyung Hee Cho

Research output: Contribution to journalArticle

Abstract

This study aimed to improve the thermal performance of matrix channels used for the internal cooling of gas turbine blades. Two types of ribs were installed on the leading and trailing surfaces in the channel with a constant height. Numerical analyses were carried out for the vertical and inclined ribs, and the Reynolds number was fixed at 10,500. In the case of vertical rib, the swirl flow was not enhanced, and the flow was disturbed. As a result, the pressure drop increased considerably, and the thermal performance decreased. However, in the case of the inclined rib, the swirl flow was strengthened by the secondary flow. As a result, a hight heat transfer distribution was observed at the back of the rib. Futhermore, the thermal performance improved significantly compared to that of the matrix channel without a rib.

Original languageEnglish
Pages (from-to)329-337
Number of pages9
JournalTransactions of the Korean Society of Mechanical Engineers, B
Volume43
Issue number5
DOIs
Publication statusPublished - 2019 Jan 1

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Numerical analysis
Heat transfer
Secondary flow
Turbomachine blades
Pressure drop
Gas turbines
Reynolds number
Cooling
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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title = "Numerical analysis on the shape of ribs for enhancing heat transfer in matrix channel",
abstract = "This study aimed to improve the thermal performance of matrix channels used for the internal cooling of gas turbine blades. Two types of ribs were installed on the leading and trailing surfaces in the channel with a constant height. Numerical analyses were carried out for the vertical and inclined ribs, and the Reynolds number was fixed at 10,500. In the case of vertical rib, the swirl flow was not enhanced, and the flow was disturbed. As a result, the pressure drop increased considerably, and the thermal performance decreased. However, in the case of the inclined rib, the swirl flow was strengthened by the secondary flow. As a result, a hight heat transfer distribution was observed at the back of the rib. Futhermore, the thermal performance improved significantly compared to that of the matrix channel without a rib.",
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Numerical analysis on the shape of ribs for enhancing heat transfer in matrix channel. / Lee, Hyoung Min; Choi, Seok Min; Bang, Minho; Kim, Taehyun; Joo, Won-Gu; Cho, Hyung Hee.

In: Transactions of the Korean Society of Mechanical Engineers, B, Vol. 43, No. 5, 01.01.2019, p. 329-337.

Research output: Contribution to journalArticle

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AU - Lee, Hyoung Min

AU - Choi, Seok Min

AU - Bang, Minho

AU - Kim, Taehyun

AU - Joo, Won-Gu

AU - Cho, Hyung Hee

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AB - This study aimed to improve the thermal performance of matrix channels used for the internal cooling of gas turbine blades. Two types of ribs were installed on the leading and trailing surfaces in the channel with a constant height. Numerical analyses were carried out for the vertical and inclined ribs, and the Reynolds number was fixed at 10,500. In the case of vertical rib, the swirl flow was not enhanced, and the flow was disturbed. As a result, the pressure drop increased considerably, and the thermal performance decreased. However, in the case of the inclined rib, the swirl flow was strengthened by the secondary flow. As a result, a hight heat transfer distribution was observed at the back of the rib. Futhermore, the thermal performance improved significantly compared to that of the matrix channel without a rib.

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