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

doi:10.3795/KSME-B.2019.43.5.329

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

Department of Mechanical Engineering

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

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 language	English
Pages (from-to)	329-337
Number of pages	9
Journal	Transactions of the Korean Society of Mechanical Engineers, B
Volume	43
Issue number	5
DOIs	https://doi.org/10.3795/KSME-B.2019.43.5.329
Publication status	Published - 2019

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Publisher Copyright:
© 2019 The Korean Society of Mechanical Engineers

All Science Journal Classification (ASJC) codes

Mechanical Engineering

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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.",

author = "Lee, {Hyoung Min} and Choi, {Seok Min} and Minho Bang and Taehyun Kim and Joo, {Won Gu} and Cho, {Hyung Hee}",

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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

PY - 2019

Y1 - 2019

N2 - 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.

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

Abstract

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