The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes

Libing, Lin; , Zhang Bo; Jiquan, Li; Naru, Zhang

Lin Libing, Zhang Bo , Li Jiquan, Zhang Naru

The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes

Abstract:

With the increase of temperature requirement, the application of metal matrix materials is gradually reduced due to its poor temperature resistance. In order to improve the application of traditional metal based materials, new cooling technology must be developed to meet the application of metal based materials. In this paper, the cooling flow field of cylindrical hole and two kinds of stepped film holes based on metal materials is simulated by large eddy method(LES), the development of vortex structure and flow characteristics in the mixing area of coolant flow and mainstream are analyzed and studied. The distribution is strongly effected by stronger thermal convection compared with the new temperature resistant material. The results show that four kinds of vortices form downstream the film hole, namely, horseshoes vortex, shear layer vortex, hairpin vortex and the counter rotate vortex pair (CVP). The CVRP formed on the stepped plane which strongly influences the flow and heat transfer of downstream, which is more evident in metal based materials, especially resulted by its isotropic features. Compared with the cylindrical film hole, the structure of step plane efficiently decreases the coolant flow velocity which results in a decrease of the CVP intensity so that the cooling film is adherent to the wall. The thermal conductivity of metal base material is strong, which has a great influence on the temperature distribution inside the wall. Velocity pulsation tightly influenced by CVP, in where the CVP intensity is strong, velocity pulsation is also strong so that the coolant flow strongly mixes with the mainstream. The flow velocity and velocity pulsation decrease with the increasing of the area ratio of stepped hole. The influence of geometric parameters on the heat transfer performance is mainly due to the high heat transfer performance of the metal matrix material.

Keywords:
film cooling; LES; vortex structure; cooling effect

Issue: 2020, Volume 71, Issue 4

Pages: 488-499

Publication date: 2020/5/5

https://doi.org/10.37358/RC.20.4.8091

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
LIBING, L., , Z.B., JIQUAN, L., NARU, Z., The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes, Rev. Chim., 71(4), 2020, 488-499.

Vancouver
Libing L, ZB, Jiquan L, Naru Z. The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes. Rev. Chim.[internet]. 2020 Apr;71(4):488-499. Available from: https://doi.org/10.37358/RC.20.4.8091

APA 6th edition
Libing, L., , Z.B., Jiquan, L. & Naru, Z. (2020). The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes. Revista de Chimie, 71(4), 488-499. https://doi.org/10.37358/RC.20.4.8091

Harvard
Libing, L., , Z.B., Jiquan, L., Naru, Z. (2020). 'The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes', Revista de Chimie, 71(4), pp. 488-499. https://doi.org/10.37358/RC.20.4.8091

IEEE
L. Libing, Z.B. , L. Jiquan, Z. Naru, "The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes". Revista de Chimie, vol. 71, no. 4, pp. 488-499, 2020. [online]. https://doi.org/10.37358/RC.20.4.8091

Text
Lin Libing, Zhang Bo , Li Jiquan, Zhang Naru,
The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes,
Revista de Chimie,
Volume 71, Issue 4,
2020,
Pages 488-499,
ISSN 2668-8212,
https://doi.org/10.37358/RC.20.4.8091.
(https://revistadechimie.ro/Articles.asp?ID=8091)
Keywords: film cooling; LES; vortex structure; cooling effect

RIS
TY - JOUR
T1 - The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes
A1 - Libing, Lin
A2 - , Zhang Bo
A3 - Jiquan, Li
A4 - Naru, Zhang
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2020
VL - 71
IS - 4
SP - 488
EP - 499
UR - https://doi.org/10.37358/RC.20.4.8091
KW - film cooling
KW - LES; vortex structure
KW - cooling effect
ER -

BibTex
@article{RevCh2020P488,
author = {Libing Lin and Zhang Bo and Jiquan Li and Naru Zhang},
title = {The Heat Transfer Characteristics in Stepped Hole of Traditional Metal Materials Induced by Stepped Film Holes},
journal = {Revista de Chimie},
volume = {71},
number = {4},
pages = {488-499},
year = {2020},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.20.4.8091},
url = {https://revistadechimie.ro/Articles.asp?ID=8091}
}

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