Publication result detail

Experimental Verification of the Effect of Rotor Design Changes on the Mechanical Losses

KUDLÁČEK, P.; NOVOTNÝ, P.; VACULA, J.

Original Title

Experimental Verification of the Effect of Rotor Design Changes on the Mechanical Losses

English Title

Experimental Verification of the Effect of Rotor Design Changes on the Mechanical Losses

Type

Paper in proceedings outside WoS and Scopus

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

Turbocharger; friction losses; rotor fluid interaction; shape modification

Key words in English

Turbocharger; friction losses; rotor fluid interaction; shape modification

Authors

KUDLÁČEK, P.; NOVOTNÝ, P.; VACULA, J.

RIV year

2023

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

Pages from

97

Pages to

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",
  number="1",
  pages="97--104",
  publisher="Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering",
  address="Bratislava",
  isbn="978-80-227-5215-2"
}