• search hit 28 of 28
Back to Result List

Simplified Determination of Aerodynamic Damping for Bladed Rotors, Part 1: Experimental Validation at Rest

  • Considering both a radial turbine rotor of a turbocharger and an axial compressor test blisk at rest, aerodynamic damping characteristics are experimentally and numerically analyzed. Linear dependencies of modal damping ratios on the ambient pressure or the acoustic impedance, respectively, could be shown within experiments carried out inside a pressure chamber. The impact of the ambient air clearly dominates the modal damping ratios compared to the minor contribution of the structure. Assuming that acoustic emission can be regarded as main source of aerodynamic damping a simplified approach for its determination is introduced which only depends on natural frequency, mode shape and acoustic impedance. It is shown that a satisfying match between experiment and computation is achieved for those cases which are dedicated to sufficiently small ratios between wave lengths of acoustic emissions and blade distances.

Export metadata

Additional Services

Search Google Scholar
Metadaten
Author: Bernd BeirowORCiD, Thomas Maywald, Felix Figaschewsky, Arnold Kühhorn, Christoph Rocky Heinrich, Thomas Giersch
DOI:https://doi.org/10.1115/GT2016-56535
ISBN:978-0-7918-4984-2
Title of the source (English):ASME Turbo Expo 2016, Turbomachinery Technical Conference and Exposition, Volume 7B, Structures and Dynamics, Seoul, South Korea, June 13–17, 2016
Publisher:ASME
Place of publication:New York, NY
Document Type:Conference publication peer-reviewed
Language:English
Year of publication:2016
Comment:
Paper No. GT2016-56535
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Strukturmechanik und Fahrzeugschwingungen
Einverstanden ✔
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.