Engineering Mechanics

International Conference

Proceedings Vol. 27/28 (2022)


May 9 – 12, 2022, Milovy, Czech Republic
Editors: Cyril Fischer and Jiří Náprstek

Copyright © 2022 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague

ISBN 978-80-86246-48-2 (printed)
ISBN 978-80-86246-51-2 (electronic)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

Computational estimation of sealing gas blowby
Kudláček P., Novotný P., Vacula J.
pages 233 - 236, full text

From the design and principle of operation of the sealing system of turbochargers, it is obvious that the seal of the non-contact type cannot perfectly close and separate the central housing from the compressor and turbine housing, thus gas blowby occurs. Approaches to determine the gas flow through a sealing system based on CFD models or direct measurement are often, expensive, time consuming and require some computational power. For rapid analysis of turbocharger blowby, analytical relationships can be used that provide sufficient accuracy. This paper demonstrates the use of these simplified analytical relations and expresses their agreement with measurements made on a real turbocharger under real operating conditions. The results show minor differences between the performed measurement and the analytical calculation. This can be attributed to the many simplifying assumptions in place. In a real machine, due to variable operating conditions, the seal rings move and thus the axial clearances change. A closer analysis of the ring movements could decrease the difference between experiment and calculation results.

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Ownership of copyright in original research articles remains with the Authors, and provided that, when reproducing parts of the contribution, the Authors acknowledge and/or reference the Proceedings, the Authors do not need to seek permission for re-use of their material.

All papers were reviewed by members of the scientific committee.

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