Blade Vibration on Centrifugal Compressors — Blade Response to Different Excitation Conditions

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Haupt, U.; Bammert, K.; Rautenberg, M.: Blade Vibration on Centrifugal Compressors — Blade Response to Different Excitation Conditions. In: International Journal of Turbo and Jet Engines 4 (1987), S. 271-284. DOI: https://doi.org/10.1515/TJJ.1987.4.3-4.271

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Sum total of downloads: 23




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Abstract: 
Results and analysis of blade vibration measurements on a high pressure ratio/high mass flow centrifugal compressor made with strain gages and using multichannel telemetry are described for compressors with 3 different types of vaned diffusers. Considerable high frequency blade excitation and vibration of the shallow region near the impeller outlet were observed. Initial progress to predict this dangerous excitation caused by the diffuser vanes was made with the help of FE computations using a simplified element system consisting of the vibrating zones of a 90ºsector of the impeller. Satisfactory agreement with measured vibration data was achieved. The influence of rotating stall on blade excitation was investigated using different types of vaned diffusers leading to different numbers of rotation stall zones and variations in the rotational speed of the cells. Blade vibration intensity due to surge in conjunction with variations of the diffuser is also considered. Holographic interferometry was successfully applied to blade vibration measurements on compressors in operation. The investigation was aimed at studying the occurrence of blade modes and the vibratory behavior of the different blades near the interesting inlet zone. The occurrence of different constellations of blade modes at a resonance point and at an operating point far from resonance was demonstrated. © Freund Publishing House Ltd.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: article
Publishing status: publishedVersion
Issue Date: 1987
Appears in Collections:Fakultät für Maschinenbau

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1 image of flag of Germany Germany 21 91.30%
2 image of flag of China China 2 8.70%

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