Multipoint electromagnetic excitation for experimental investigation of rotating bladed wheel dynamics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F21%3A00546975" target="_blank" >RIV/61388998:_____/21:00546975 - isvavai.cz</a>

Result on the web

<a href="https://www.icsv27.org/" target="_blank" >https://www.icsv27.org/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Multipoint electromagnetic excitation for experimental investigation of rotating bladed wheel dynamics

Original language description

Modern turbine bladed wheels are designed for higher operating temperatures and flow rates. How-ever, the trend of producing ever-longer and ever-thinner blades leads to lower dynamic stiffness. Therefore, dynamic stiffness and structural damping must be increased by additional structural ele-ments, e.g. tie-bosses, shroud connections. Such a complex mechanical structures with dry friction contacts require very precise experimental investigation under rotation. However, verification of their dynamics needs also sufficient force capacity of contactless excitation to exceed the adhesion forces in contacts. Therefore we have dealt with a development of multipoint electromagnetic exci-tation systems in our rotary laboratory. We use two strategies of excitation. The strategy A is based on the affinity of excitation forces to the travelling waves when analytical solution serves for design of the optimal space distribution and time dependences of the multipoint electromagnetic excitation. As to the placement of electromagnets and phase shift of the excitation harmonic signals, it is de-pendent on number of nodal diameters. At the strategy B, the electromagnetic pulses are synchro-nized with wheel revolutions and with dynamic responses of selected blades measured by the strain-gauge system. It requires accurate synchronization of the electromagnets with wheel revolutions and with a dynamic response of the selected blade.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

<a href="/en/project/GA20-26779S" target="_blank" >GA20-26779S: Study of dynamic stall flutter instabilities and their consequences in turbomachinery application by mathematical, numerical and experimental methods</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Article name in the collection

27th International Congress on Sound and Vibration: ICSV27

ISBN

978-83-7880-799-5

ISSN

2329-3675

e-ISSN

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Number of pages

8

Pages from-to

176

Publisher name

Silesian University Press

Place of publication

Gliwice, Poland

Event location

Virtual, Online

Event date

Jul 11, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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