Fundamental investigation on the impact of a swirling through-flow in a rotating cavity on the formation of acoustic modes

• Applicant: Professor Dr.-Ing. Dieter Brillert
• Subject Area: Hydraulic and Turbo Engines and Piston Engines
• Term: from 2019 to 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 429153912

• Final Report Year: 2024

Final Report Abstract

The research project „Fundamental Research on Acoustoelastic Modes in a Rotor-Stator Cavity with Superposed Through Flow and pre-Swirl” experimentally investigates fluid-structure interaction in a rotor-stator cavity system with disk rotation and superposed through flow (centripetal and centrifugal through flow, with and without pre-swirl). The goal is to gain fundamental insight into acoustic modes building up in the cavity, subject to different flow parameters, and their potential to excite vibration of the disk. Interaction of the acoustic and structure dominant modes are studies in detail in order to avoid possible machine failure of centrifugal compressors due to high cycle fatigue caused by potential resonances.

Publications

• Surrogate Models for the Prediction of Damping Ratios in Coupled Acoustoelastic Rotor-Cavity Systems. Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration. American Society of Mechanical Engineers.
  Heinrich, Christoph Rocky; Unglaube, Tina; Beirow, Bernd; Brillert, Dieter; Steff, Klaus & Petry, Nico
  
• Surrogate Models for the Prediction of Damping Ratios in Coupled Acoustoelastic Rotor-Cavity Systems. Journal of Engineering for Gas Turbines and Power, 144(8).
  Heinrich, Christoph Rocky; Unglaube, Tina; Beirow, Bernd; Brillert, Dieter; Steff, Klaus & Petry, Nico