<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>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 includes all interactions of the rotor with the environment. Analytical and empirical descriptions of turbulent or laminar flow around rotating surfaces have been used to estimate the mechanical losses of a turbocharger rotor based on geometric parameters and operating conditions. Based on the knowledge of the effect of each parameter, design changes to the rotor were proposed. The positive effect of simple design modifications on mechanical losses was experimentally verified by measurements on a test turbocharger.</p>
</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 includes all interactions of the rotor with the environment. Analytical and empirical descriptions of turbulent or laminar flow around rotating surfaces have been used to estimate the mechanical losses of a turbocharger rotor based on geometric parameters and operating conditions. Based on the knowledge of the effect of each parameter, design changes to the rotor were proposed. The positive effect of simple design modifications on mechanical losses was experimentally verified by measurements on a test turbocharger.

Investigating the Effect of Rotor Design Changes on Mechanical Losses Due to Rotor-Fluid Interaction

Faculty of Mechanical Engineering, Brno University of Technology

Department of Automotive and Material Handling Engineering

Strojnícky časopis - Journal of Mechanical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The overall efficiency of high-speed rotating machines depends largely on their mechanical efficiency. Mechanical efficiency is not just a matter of bearing...

Investigating the Effect of Rotor Design Changes on Mechanical Losses Due to Rotor-Fluid Interaction

Published Online: Nov 18, 2022

Page range: 71 - 80

DOI: https://doi.org/10.2478/scjme-2022-0042

Keywords
Turbocharger, rotor fluid interaction, mechanical efficiency, shape modification, friction losses

© 2022 Petr Kudláček et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Investigating the Effect of Rotor Design Changes on Mechanical Losses Due to Rotor-Fluid Interaction

Published Online: Nov 18, 2022

Page range: 71 - 80

DOI: https://doi.org/10.2478/scjme-2022-0042

KeywordsTurbocharger, rotor fluid interaction, mechanical efficiency, shape modification, friction losses

© 2022 Petr Kudláček et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Turbocharger, rotor fluid interaction, mechanical efficiency, shape modification, friction losses