Effects of cross-flow mach number on flow and heat transfer characteristics around effusion hole

Wen Chao Su; Hui Ren Zhu; Jian Hao Nie

doi:10.13675/j.cnki.tjjs.2014.12.009

Effects of cross-flow mach number on flow and heat transfer characteristics around effusion hole

Wen Chao Su, Hui Ren Zhu, Jian Hao Nie

School of Power and Energy

Northwestern Polytechnical University Xian

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

2 Scopus citations

Abstract

Heat transfer and flow characteristics in a rectangular channel with 90° and 45° effusion hole under the cross-flow Mach number of 0.2 and 0.7 have been numerically studied. The entrance Reynolds number is 8×10⁴ and cross-flow ratio is 0.5 and 1. A smooth channel was also investigated to get a reference for calculation. Numerical results reveal that when both the entrance Reynolds number and cross-flow ratio are constant, with an increase in cross-flow Mach number from 0.2 to 0.7, the range of inverse flow in the effusion hole is decreased and thus the flow resistance is weakened. Besides, the local heat transfer near the effusion holes is weakened with increase of the cross-flow Mach numbers. Additionally, the cross-flow Mach number, under the low cross-flow ratio, has a stronger effect on the heat transfer on cooling channel wall in comparison with the high cross-flow ratio.

Original language	English
Pages (from-to)	1645-1652
Number of pages	8
Journal	Tuijin Jishu/Journal of Propulsion Technology
Volume	35
Issue number	12
DOIs	https://doi.org/10.13675/j.cnki.tjjs.2014.12.009
State	Published - 1 Dec 2014

Keywords

Cooling channel
Cross-flow ratio
Effusion hole
Heat transfer coefficient
Mach number
Numerical simulation
Turbine blade

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10.13675/j.cnki.tjjs.2014.12.009

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title = "Effects of cross-flow mach number on flow and heat transfer characteristics around effusion hole",

abstract = "Heat transfer and flow characteristics in a rectangular channel with 90° and 45° effusion hole under the cross-flow Mach number of 0.2 and 0.7 have been numerically studied. The entrance Reynolds number is 8×104 and cross-flow ratio is 0.5 and 1. A smooth channel was also investigated to get a reference for calculation. Numerical results reveal that when both the entrance Reynolds number and cross-flow ratio are constant, with an increase in cross-flow Mach number from 0.2 to 0.7, the range of inverse flow in the effusion hole is decreased and thus the flow resistance is weakened. Besides, the local heat transfer near the effusion holes is weakened with increase of the cross-flow Mach numbers. Additionally, the cross-flow Mach number, under the low cross-flow ratio, has a stronger effect on the heat transfer on cooling channel wall in comparison with the high cross-flow ratio.",

keywords = "Cooling channel, Cross-flow ratio, Effusion hole, Heat transfer coefficient, Mach number, Numerical simulation, Turbine blade",

author = "Su, {Wen Chao} and Zhu, {Hui Ren} and Nie, {Jian Hao}",

year = "2014",

month = dec,

day = "1",

doi = "10.13675/j.cnki.tjjs.2014.12.009",

language = "英语",

volume = "35",

pages = "1645--1652",

journal = "Tuijin Jishu/Journal of Propulsion Technology",

issn = "1001-4055",

publisher = "Journal of Propulsion Technology",

number = "12",

}

TY - JOUR

T1 - Effects of cross-flow mach number on flow and heat transfer characteristics around effusion hole

AU - Su, Wen Chao

AU - Zhu, Hui Ren

AU - Nie, Jian Hao

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Heat transfer and flow characteristics in a rectangular channel with 90° and 45° effusion hole under the cross-flow Mach number of 0.2 and 0.7 have been numerically studied. The entrance Reynolds number is 8×104 and cross-flow ratio is 0.5 and 1. A smooth channel was also investigated to get a reference for calculation. Numerical results reveal that when both the entrance Reynolds number and cross-flow ratio are constant, with an increase in cross-flow Mach number from 0.2 to 0.7, the range of inverse flow in the effusion hole is decreased and thus the flow resistance is weakened. Besides, the local heat transfer near the effusion holes is weakened with increase of the cross-flow Mach numbers. Additionally, the cross-flow Mach number, under the low cross-flow ratio, has a stronger effect on the heat transfer on cooling channel wall in comparison with the high cross-flow ratio.

AB - Heat transfer and flow characteristics in a rectangular channel with 90° and 45° effusion hole under the cross-flow Mach number of 0.2 and 0.7 have been numerically studied. The entrance Reynolds number is 8×104 and cross-flow ratio is 0.5 and 1. A smooth channel was also investigated to get a reference for calculation. Numerical results reveal that when both the entrance Reynolds number and cross-flow ratio are constant, with an increase in cross-flow Mach number from 0.2 to 0.7, the range of inverse flow in the effusion hole is decreased and thus the flow resistance is weakened. Besides, the local heat transfer near the effusion holes is weakened with increase of the cross-flow Mach numbers. Additionally, the cross-flow Mach number, under the low cross-flow ratio, has a stronger effect on the heat transfer on cooling channel wall in comparison with the high cross-flow ratio.

KW - Cooling channel

KW - Cross-flow ratio

KW - Effusion hole

KW - Heat transfer coefficient

KW - Mach number

KW - Numerical simulation

KW - Turbine blade

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U2 - 10.13675/j.cnki.tjjs.2014.12.009

DO - 10.13675/j.cnki.tjjs.2014.12.009

M3 - 文章

AN - SCOPUS:84920748914

SN - 1001-4055

VL - 35

SP - 1645

EP - 1652

JO - Tuijin Jishu/Journal of Propulsion Technology

JF - Tuijin Jishu/Journal of Propulsion Technology

IS - 12

ER -

Effects of cross-flow mach number on flow and heat transfer characteristics around effusion hole

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Keywords

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