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EXCITED BLADE VIBRATION FOR AEROELASTIC INVESTIGATIONS OF A ROTATING BLISK USING PIEZO-ELECTRIC MACRO FIBER COMPOSITES

Belz, Joachim and May, Markus and Siemann, Jan and Seume, Joerg R. and Voigt, Christian and Böhmer, Heiko and Grüber, Björn (2013) EXCITED BLADE VIBRATION FOR AEROELASTIC INVESTIGATIONS OF A ROTATING BLISK USING PIEZO-ELECTRIC MACRO FIBER COMPOSITES. In: Proceedings ASME Turbo Expo 2013. ASME Turbo Expo 2013, 03.-07. Jun. 2013, San Antonio, TX, USA.

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Abstract

Experimental investigations of the aerodynamic damping of compressor blades are usually performed by forcing the blades externally to a motion that is similar to a given mode shape and inter-blade phase angle (IBPA) while measuring the motioninduced unsteady pressure distribution. Evaluating this to an aerodynamic work entry from the fluid to the blade, at least a local contribution to the flutter (in-)stability can be determined. Test rigs are usually non-rotating linear or rotating annular cascade wind tunnels. In the latter case, besides measuring in and transmitting data out of the rotating system, the excitation of the blades themselves is still a challenge. In the present case a blisk rotor with realistic fan blade geometries and flow conditions was investigated aeroelastically. For the excitation of the 1st bending (1F) mode shape of the blading a sector of five blades was chosen. In this sector the natural vibration of the blading, represented by constant vibration amplitudes and a given IBPA should be simulated. Therefore the blades were equipped with Macro Fiber Composites (MFC). These foils of piezoelectric material expand and contract due to the applied high voltage. A control system was developed to adjust the amplitude and the IBPA of the blade vibration. For the transmission of the high voltage, a separate data transmission system on the base of liquid metals was chosen. The blade vibration was measured by strain gauges and additionally monitored by a specific rig system. The aeroelastic investigations were carried out in the compressor test facility M2VP of the DLR Institute of Propulsion Technology in Cologne. During the measurement, the MFCs were able to excite the blades to a certain extent. The paper will present the technique to excite the blades of a compressor blisk by means of MFCs as well as achieved vibration amplitudes and limitations under engine-like operating conditions.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:EXCITED BLADE VIBRATION FOR AEROELASTIC INVESTIGATIONS OF A ROTATING BLISK USING PIEZO-ELECTRIC MACRO FIBER COMPOSITES
Authors:
AuthorsInstitution or Email of Authors
Belz, Joachimjoachim.belz@dlr.de
May, Markusmarkus.may@airbus.com
Siemann, Jansiemann@tfd.uni-hannover.de
Seume, Joerg R.seume@tfd.uni-hannover.de
Voigt, Christianc.voigt@dlr.de
Böhmer, Heikoboehmer@hawk-hhg.de
Grüber, Björnbjoern.grueber@mtu.de
Date:2013
Journal or Publication Title:Proceedings ASME Turbo Expo 2013
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:aeroelastic investigation, blisk, excited blade vibration, piezo foils (MFC)
Event Title:ASME Turbo Expo 2013
Event Location:San Antonio, TX, USA
Event Type:international Conference
Event Dates:03.-07. Jun. 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies
Location: Köln-Porz , Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Experiments
Institute of Propulsion Technology > Fan and Compressor
Deposited By: Joachim Belz
Deposited On:15 Aug 2013 11:01
Last Modified:15 Aug 2013 11:01

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