Unidirectional coupled aerodynamic and structural mechanic analysis of a turbine blading

verfasst von: Michael Henke, Y. Guendogdu, J. Seume, C. Siewert, L. Panning, J. Wallaschek
Abstract: This paper presents a procedure for the unidirectional coupled aerodynamic and structural mechanic analysis of a turbine blading by the use of modern commercial Computational Fluid Dynamics (CFD) and Finite Element Method (FEM) software. For that purpose, numerical as well as experimental investigations are carried out, based on the blading of the model air turbine test rig installed at the Institute of Turbomachinery and Fluid Dynamics (TFD) of the Leibniz Universitaet Hannover. An experimental and numerical modal analysis of the 2^nd moving blade row blading is used as a starting point for the subsequent numerical investigations. Once the critical operating points are identified using the results of the modal analysis in terms of a computed Campbell diagram, flow calculations at the corresponding operation points are conducted and compared to design point data. As a result of the flow calculations, the circumferential alteration of the total pressure in the wake of the 2^nd1 standing blade row is analyzed in order to obtain the dynamic loads needed in a forced response analysis. In the next step, the blades static surface pressure distribution known from the CFD calculations is transferred to the FE model. To model the dynamic loads acting on the blades of the 2^nd moving blade row, the static pressure field is scaled by the normalized total pressure alteration amplitude, also called the stimulus, determined by a harmonic analysis of the data obtained form the flow calculations. Afterwards, a frequency response analysis is conducted to determine forced vibrations of the blading.
Organisationseinheit(en): Institut für Turbomaschinen und Fluid-Dynamik
Institut für Dynamik und Schwingungen
Typ: Aufsatz in Konferenzband
Seiten: 171-184
Anzahl der Seiten: 14
Publikationsdatum: 2008
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Maschinenbau

BibTeX

@inproceedings{d72a953be2884f26826ff087f0c7f65a,
title = "Unidirectional coupled aerodynamic and structural mechanic analysis of a turbine blading",
abstract = "This paper presents a procedure for the unidirectional coupled aerodynamic and structural mechanic analysis of a turbine blading by the use of modern commercial Computational Fluid Dynamics (CFD) and Finite Element Method (FEM) software. For that purpose, numerical as well as experimental investigations are carried out, based on the blading of the model air turbine test rig installed at the Institute of Turbomachinery and Fluid Dynamics (TFD) of the Leibniz Universitaet Hannover. An experimental and numerical modal analysis of the 2nd moving blade row blading is used as a starting point for the subsequent numerical investigations. Once the critical operating points are identified using the results of the modal analysis in terms of a computed Campbell diagram, flow calculations at the corresponding operation points are conducted and compared to design point data. As a result of the flow calculations, the circumferential alteration of the total pressure in the wake of the 2nd1 standing blade row is analyzed in order to obtain the dynamic loads needed in a forced response analysis. In the next step, the blades static surface pressure distribution known from the CFD calculations is transferred to the FE model. To model the dynamic loads acting on the blades of the 2nd moving blade row, the static pressure field is scaled by the normalized total pressure alteration amplitude, also called the stimulus, determined by a harmonic analysis of the data obtained form the flow calculations. Afterwards, a frequency response analysis is conducted to determine forced vibrations of the blading.",
author = "Michael Henke and Y. Guendogdu and J. Seume and C. Siewert and L. Panning and J. Wallaschek",
year = "2008",
language = "English",
isbn = "9781843344582",
pages = "171--184",
booktitle = "Ninth International Conference on Vibrations in Rotating Machinery",
note = "9th International Conference on Vibrations in Rotating Machinery ; Conference date: 08-09-2008 Through 10-09-2008",
}