Technical Solution to Decrease Cavitation Effects in the Kaplan Turbine Blade
- Authors: Khalid M.R.1, Reza Kashyzadeh K.1, Ghorbani S.1
-
Affiliations:
- RUDN University
- Issue: Vol 25, No 2 (2024)
- Pages: 121-129
- Section: Articles
- URL: https://journals.rcsi.science/2312-8143/article/view/327562
- DOI: https://doi.org/10.22363/2312-8143-2024-25-2-121-129
- EDN: https://elibrary.ru/HWEUSZ
- ID: 327562
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Abstract
Application of Kaplan turbines is widespread in low-water-head and large-capacity hydropower plants. An understanding of the failure mechanism of Kaplan Turbines is a key factor to provide useful solutions for their prevention or early treatment and to guarantee their workability. The long-term performance of Kaplan turbines depends on many factors such as cavitation, erosion, fatigue, and material defects. Cavitation in Kaplan turbines leads to flow instability, vibrations, surface damage, and reduce the machine performance. Therefore, this paper investigates the factors leading to cavitation in Kaplan turbine and presents practical solutions for it. Thermal-sprayed coatings are frequently applied due to their high wear resistance, cost effectiveness, weight reduction, and less negative impacts on base metal. Moreover, HVOF is used to create coatings with a high density and bonding strength. At high temperatures, cermet coatings, including nanoparticles, exhibit exceptional wear resistance. WC-based nanostructured and multifaceted coatings are utilized due to their high wear resistance. In addition, chromium carbide in WC-based coatings increases their oxidation and wear resistance.
Keywords
About the authors
Mohammed Ridha W. Khalid
RUDN University
Email: 1042218144@rudn.ru
ORCID iD: 0009-0009-0798-4317
Ph.D. student, Department of Mechanical Engineering Technologies, Academy of Engineering
Moscow, RussiaKazem Reza Kashyzadeh
RUDN University
Email: reza-kashi-zade-ka@rudn.ru
ORCID iD: 0000-0003-0552-9950
Candidate of Technical Sciences, Professor, Department of Transport, Academy of Engineering
Moscow, RussiaSiamak Ghorbani
RUDN University
Author for correspondence.
Email: gorbani-s@rudn.ru
ORCID iD: 0000-0003-0251-3144
SPIN-code: 8272-2337
Candidate of Technical Sciences, Associate Professor, Department of Mechanical Engineering Technologies, Academy of Engineering
Moscow, RussiaReferences
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