Publication detail
Experimental Verification of the Effect of Rotor Design Changes on the Mechanical Losses
KUDLÁČEK, P. NOVOTNÝ, P. VACULA, J.
English title
Experimental Verification of the Effect of Rotor Design Changes on the Mechanical Losses
Type
article in a collection out of WoS and Scopus
Language
en
Original abstract
The overall efficiency of high-speed rotating machines depends largely on their mechanical efficiency. Mechanical efficiency is not just a matter of bearing losses, but it includes all interactions of the rotor with its environment. Significant losses occur as a result of rotating surfaces in the operating fluids or as a result of interaction with the rotor seal system. Analytical and empirical descriptions of turbulent or laminar flows around the rotating surfaces were used to estimate the mechanical losses of the turbocharger rotor based on geometric parameters and operational conditions. Based on the knowledge of the influence of each parameter, design changes on the rotor and stator were proposed. The positive effect of design modifications on mechanical losses was experimentally verified by measurements on a test turbocharger. The results demonstrate that a reduction of mechanical losses can be achieved by very simple design modifications, without significant costs.
English abstract
The overall efficiency of high-speed rotating machines depends largely on their mechanical efficiency. Mechanical efficiency is not just a matter of bearing losses, but it includes all interactions of the rotor with its environment. Significant losses occur as a result of rotating surfaces in the operating fluids or as a result of interaction with the rotor seal system. Analytical and empirical descriptions of turbulent or laminar flows around the rotating surfaces were used to estimate the mechanical losses of the turbocharger rotor based on geometric parameters and operational conditions. Based on the knowledge of the influence of each parameter, design changes on the rotor and stator were proposed. The positive effect of design modifications on mechanical losses was experimentally verified by measurements on a test turbocharger. The results demonstrate that a reduction of mechanical losses can be achieved by very simple design modifications, without significant costs.
Keywords in English
Turbocharger; friction losses; rotor fluid interaction; shape modification
Released
09.09.2022
Publisher
Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering
Location
Bratislava
ISBN
978-80-227-5215-2
Book
Scientific Proceedings KOKA 2022
Edition number
1
Pages from–to
97–104
Pages count
7
BIBTEX
@inproceedings{BUT179955,
author="Petr {Kudláček} and Pavel {Novotný} and Jiří {Vacula},
title="Experimental Verification of the Effect of Rotor Design Changes on the Mechanical Losses",
booktitle="Scientific Proceedings KOKA 2022",
year="2022",
month="September",
pages="97--104",
publisher="Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering",
address="Bratislava",
isbn="978-80-227-5215-2"
}