Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow

Ünal Akdağ; Meray Sizğen; Soefou Omar Hassani

doi:10.5281/zenodo.21479051

Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow

Abstract

This study aims to investigate the flow and heat transfer characteristics of pulsating-jet cooling with sister holes in the flow through a duct. The sister-hole cooling structures were implemented by varying blowing rates, main-flow Reynolds number, pulsating-jet amplitude, and frequency, while the hole diameters and geometrical parameters were kept constant. A single-hole jet film cooling structure with only duct flow when the holes are inactive, as well as a single-hole jet, was selected as the model for comparison. The numerical results are verified using experimental data from literature, and the tangential velocity vectors and flow structures are examined. Additionally, instantaneous velocity and temperature contours are obtained, and the flow structure is analyzed. The results demonstrate that the primary hole generates large vortices in the flow. The sister holes facilitate flow adhesion to the surface, forming a homogeneous distribution on the heater and enhancing film cooling performance. The blowing ratio and pulsating jet parameters revealed that the presence of sister holes significantly impacted the flow and heat transfer characteristics of the cooling cases. It was observed that the vortex distributions generated by the jet effect along the channel increased the degree of flow mixing. It is concluded that flow mixtures significantly improve heat transfer, and that jetting with sister holes offers an effective means to achieve this improvement.

Keywords

Supporting Institution

AKSARAY ÜNİVERSİTESİ

Project Number

ASÜ-BAP-2025-028

Ethical Statement

he author(s) declare(s) that this study does not require ethical approval, as it does not involve any human or animal subjects, clinical trials, or personal data collection."

Thanks

The authors would like to thank Aksaray University Scientific Research Projects Coordination Unit for supporting this study (Project No: ASÜ-BAP-2025-028).

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Details

Primary Language

English

Subjects

Numerical Methods in Mechanical Engineering

Journal Section

Research Article

Authors

Ünal Akdağ ^*
0000-0002-1149-7425
Türkiye

Meray Sizğen
0009-0005-3195-4039
Türkiye

Soefou Omar Hassani
0009-0008-7827-1165
Comoros

Publication Date

July 22, 2026

Submission Date

May 12, 2026

Acceptance Date

July 3, 2026

Published in Issue

Year 2026 Volume: 3 Number: 1

DOI

https://doi.org/10.5281/zenodo.21479051

IZ

https://izlik.org/JA39CH48YS

Cite

RIS / Bibtex

APA

Akdağ, Ü., Sizğen, M., & Hassani, S. O. (2026). Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow. Journal of Energy Trends, 3(1), 1-10. https://doi.org/10.5281/zenodo.21479051

AMA

1.Akdağ Ü, Sizğen M, Hassani SO. Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow. Journal of Energy Trends. 2026;3(1):1-10. doi:10.5281/zenodo.21479051

Chicago

Akdağ, Ünal, Meray Sizğen, and Soefou Omar Hassani. 2026. “Numerical Investigation of a Pulsating Jet With Sister-Holes on Heat Transfer in a Channel Flow”. Journal of Energy Trends 3 (1): 1-10. https://doi.org/10.5281/zenodo.21479051.

EndNote

Akdağ Ü, Sizğen M, Hassani SO (July 1, 2026) Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow. Journal of Energy Trends 3 1 1–10.

IEEE

[1]Ü. Akdağ, M. Sizğen, and S. O. Hassani, “Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow”, Journal of Energy Trends, vol. 3, no. 1, pp. 1–10, July 2026, doi: 10.5281/zenodo.21479051.

ISNAD

Akdağ, Ünal - Sizğen, Meray - Hassani, Soefou Omar. “Numerical Investigation of a Pulsating Jet With Sister-Holes on Heat Transfer in a Channel Flow”. Journal of Energy Trends 3/1 (July 1, 2026): 1-10. https://doi.org/10.5281/zenodo.21479051.

JAMA

1.Akdağ Ü, Sizğen M, Hassani SO. Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow. Journal of Energy Trends. 2026;3:1–10.

MLA

Akdağ, Ünal, et al. “Numerical Investigation of a Pulsating Jet With Sister-Holes on Heat Transfer in a Channel Flow”. Journal of Energy Trends, vol. 3, no. 1, July 2026, pp. 1-10, doi:10.5281/zenodo.21479051.

Vancouver

1.Ünal Akdağ, Meray Sizğen, Soefou Omar Hassani. Numerical Investigation of a Pulsating Jet with Sister-Holes on Heat Transfer in a Channel Flow. Journal of Energy Trends. 2026 Jul. 1;3(1):1-10. doi:10.5281/zenodo.21479051