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Influence of Rotor Tip Blockage on Near Stall Blade Vibrations in an Axial Compressor Rig

Möller, Daniel and Jüngst, Maximilian and Schiffer, Heinz-Peter and Giersch, Thomas and Heinichen, Frank (2017):
Influence of Rotor Tip Blockage on Near Stall Blade Vibrations in an Axial Compressor Rig.
7B, In: Volume 7B: Structures and Dynamics, In: Proceedings of the ASME Turbo Expo 2017, Charlotte, NC, USA, June 26-30, 2017, p. 63660, DOI: 10.1115/GT2017-63660,
[Online-Edition: https://doi.org/10.1115/GT2017-63660],
[Conference or Workshop Item]

Abstract

Rotor blade vibrations observed in the Darmstadt transonic compressor rig are investigated in this paper. The vibrations are non-synchronous and occur in the near stall operating region. Rotor tip flow fluctuations traveling near the leading edge against the direction of rotation (in the rotor relative frame of reference) with about 50% blade tip speed are found to be the reason for the occurrence of the vibrations. The investigations show, that the blockage at the rotor tip is an important factor for the aeroelastic stability of the compressor in the near stall region. It is found, that by application of a recirculating tip injection casing treatment, the aeroelastic stability increases as a result of reduced blockage in the rotor tip region.

Item Type: Conference or Workshop Item
Erschienen: 2017
Creators: Möller, Daniel and Jüngst, Maximilian and Schiffer, Heinz-Peter and Giersch, Thomas and Heinichen, Frank
Title: Influence of Rotor Tip Blockage on Near Stall Blade Vibrations in an Axial Compressor Rig
Language: English
Abstract:

Rotor blade vibrations observed in the Darmstadt transonic compressor rig are investigated in this paper. The vibrations are non-synchronous and occur in the near stall operating region. Rotor tip flow fluctuations traveling near the leading edge against the direction of rotation (in the rotor relative frame of reference) with about 50% blade tip speed are found to be the reason for the occurrence of the vibrations. The investigations show, that the blockage at the rotor tip is an important factor for the aeroelastic stability of the compressor in the near stall region. It is found, that by application of a recirculating tip injection casing treatment, the aeroelastic stability increases as a result of reduced blockage in the rotor tip region.

Title of Book: Volume 7B: Structures and Dynamics
Volume: 7B
Uncontrolled Keywords: Compressors , Rotors , Vibration , Blades
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute of Gas Turbines and Aerospace Propulsion (GLR)
Event Title: Proceedings of the ASME Turbo Expo 2017
Event Location: Charlotte, NC, USA
Event Dates: June 26-30, 2017
Date Deposited: 05 Apr 2018 09:42
DOI: 10.1115/GT2017-63660
Official URL: https://doi.org/10.1115/GT2017-63660
Additional Information:

GT2017-63660

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