Proceedings of the 10th International Conference on Science and Technology (ICST 2024)

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Numerical Simulation of the Effect of Number of Runner Blades on a Cross-Flow Turbine Performance

Authors
Piter Harefa1, Muhammad Agung Bramantya1, *, Joko Waluyo1
1Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
*Corresponding author. Email: bramantya@mail.ugm.ac.id
Corresponding Author
Muhammad Agung Bramantya
Available Online 1 July 2025.
DOI
10.2991/978-94-6463-772-4_3How to use a DOI?
Keywords
Cross-flow turbine; Impeller; Runner blades; Computational fluid dynamics; Efficiency
Abstract

The utilization of renewable energy, particularly from hydropower, is still a developing field of research, and the optimal design for maximum efficiency remains a challenge to achieve. The objective of this study is to investigate the impact of the number of runner blades on the performance of a cross-flow turbine through computational fluid dynamics. The cross-flow turbine designed and experimentally tested by Sammartano et al. (2016) is used in simulation then modified impeller by changing the number of runner blades from 35 to 25 and 45. The simulation is conducted in a transient manner using a three-dimensional model and applied mesh motion method. The CFD simulation results indicate that the maximum efficiencies obtained using 25, 35 and 45 runner blades were 88.2%, 87.0% and 89.3% respectively. The impeller with 45 runner blades shows a more uniform velocity profile and a reduced exit angl. The pressure at the center and exit of the impeller is also lower, indicating a higher conversion of kinetic energy into rotational motion. Additionally, there is a reduction in turbulent kinetic energy, resulting in an enhanced output torque.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 10th International Conference on Science and Technology (ICST 2024)
Series
Advances in Engineering Research
Publication Date
1 July 2025
ISBN
978-94-6463-772-4
ISSN
2352-5401
DOI
10.2991/978-94-6463-772-4_3How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Piter Harefa
AU  - Muhammad Agung Bramantya
AU  - Joko Waluyo
PY  - 2025
DA  - 2025/07/01
TI  - Numerical Simulation of the Effect of Number of Runner Blades on a Cross-Flow Turbine Performance
BT  - Proceedings of the 10th International Conference on Science and Technology (ICST 2024)
PB  - Atlantis Press
SP  - 11
EP  - 25
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-772-4_3
DO  - 10.2991/978-94-6463-772-4_3
ID  - Harefa2025
ER  -