An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F14%3APU110124" target="_blank" >RIV/00216305:26620/14:PU110124 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly

Popis výsledku v původním jazyce

This paper presents experimental research on a turbine wheel assembly used in car engines. The aim the paper is to investigate various procedures ensuring optimal search of resonant frequencies related to mechanical excitation and measuring methods. To perform the mechanical excitation described in the article, we used a vibration shaker and a modal hammer. In the given context, two measurement approaches are compared: the application of a single-point vibrometer, and the use of a special differential vibrometer. The purpose of the research is to facilitate reliable diagnostics of resonant frequencies in turbine blades, which is a process markedly responsible for the correct balancing of a turbine wheel. Such accurate determination of the resonant frequencies of a turbine wheel influences the life of the turbocharger and, moreover, enables us to eliminate possible damage to an automotive engine caused by vibrations. All the indicated measurements are mutually compared, and another comparison is performed involving the simulation results obtained from the modal analysis. The experiments demonstrate the advantages, disadvantages and differences characterising the different types of excitation and laser interferometer measurement, with a special focus on the streamlining and acceleration of experimental measurements in the development of new turbine wheels.

Název v anglickém jazyce

An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly

Popis výsledku anglicky

This paper presents experimental research on a turbine wheel assembly used in car engines. The aim the paper is to investigate various procedures ensuring optimal search of resonant frequencies related to mechanical excitation and measuring methods. To perform the mechanical excitation described in the article, we used a vibration shaker and a modal hammer. In the given context, two measurement approaches are compared: the application of a single-point vibrometer, and the use of a special differential vibrometer. The purpose of the research is to facilitate reliable diagnostics of resonant frequencies in turbine blades, which is a process markedly responsible for the correct balancing of a turbine wheel. Such accurate determination of the resonant frequencies of a turbine wheel influences the life of the turbocharger and, moreover, enables us to eliminate possible damage to an automotive engine caused by vibrations. All the indicated measurements are mutually compared, and another comparison is performed involving the simulation results obtained from the modal analysis. The experiments demonstrate the advantages, disadvantages and differences characterising the different types of excitation and laser interferometer measurement, with a special focus on the streamlining and acceleration of experimental measurements in the development of new turbine wheels.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 21st International Congress on Sound and Vibration

ISBN

978-83-62652-66-2

ISSN

2329-3675

e-ISSN

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Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

International Institute of Acoustic and Vibration

Místo vydání

Peking

Místo konání akce

Peking

Datum konání akce

13. 7. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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