Details
| Original language | English |
|---|---|
| Article number | 121023 |
| Number of pages | 7 |
| Journal | Journal of Engineering for Gas Turbines and Power |
| Volume | 141 |
| Issue number | 12 |
| Publication status | Published - 20 Nov 2019 |
Abstract
A novel design approach for friction hysteresis measurements is introduced to simplify the characterization of turbine blade contact dynamics. It makes use of dimensionless numbers of a metallic friction contact undergoing small, periodic displacements. Such contacts are used in turbine blades to lower resonance amplitudes by energy dissipation through friction. Nonetheless, this approach is not limited to this field. The dimensionless numbers for characterization of the contact are derived based on a generic contact that is typical for applications in turbine blades. A dimensionless number can be found that characterizes the contact extensively. Several friction hysteresis measurements are conducted on a special test rig in a systematic manner exploring a large parameter space for the derived dimensionless number. Based on the experiments, it is concluded that the normalized measured friction hysteresis loops show similitude despite being measured with parameters spanning a wide range. It results in the possibility to design friction hysteresis tests for friction damped turbine blades in a simple and representative way.
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Aerospace Engineering
- Energy(all)
- Energy Engineering and Power Technology
- Energy(all)
- Fuel Technology
- Energy(all)
- Nuclear Energy and Engineering
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In: Journal of Engineering for Gas Turbines and Power, Vol. 141, No. 12, 121023, 20.11.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Analysis of Contacts in Friction Damped Turbine Blades Using Dimensionless Numbers
AU - Hoffmann, Thomas
AU - Panning-von Scheidt, Lars
AU - Wallaschek, Jörg
N1 - Funding Information: The investigations were conducted as part of the joint research program COOREFlex-turbo in the frame of AG Turbo. The work was supported by the Bundesministerium fur Wirtschaft und Technologie (BMWi) as per resolution of the German Federal Parliament under grant number 03ET7041 L. The authors gratefully acknowledge Siemens AG for their support and permission to publish this paper.
PY - 2019/11/20
Y1 - 2019/11/20
N2 - A novel design approach for friction hysteresis measurements is introduced to simplify the characterization of turbine blade contact dynamics. It makes use of dimensionless numbers of a metallic friction contact undergoing small, periodic displacements. Such contacts are used in turbine blades to lower resonance amplitudes by energy dissipation through friction. Nonetheless, this approach is not limited to this field. The dimensionless numbers for characterization of the contact are derived based on a generic contact that is typical for applications in turbine blades. A dimensionless number can be found that characterizes the contact extensively. Several friction hysteresis measurements are conducted on a special test rig in a systematic manner exploring a large parameter space for the derived dimensionless number. Based on the experiments, it is concluded that the normalized measured friction hysteresis loops show similitude despite being measured with parameters spanning a wide range. It results in the possibility to design friction hysteresis tests for friction damped turbine blades in a simple and representative way.
AB - A novel design approach for friction hysteresis measurements is introduced to simplify the characterization of turbine blade contact dynamics. It makes use of dimensionless numbers of a metallic friction contact undergoing small, periodic displacements. Such contacts are used in turbine blades to lower resonance amplitudes by energy dissipation through friction. Nonetheless, this approach is not limited to this field. The dimensionless numbers for characterization of the contact are derived based on a generic contact that is typical for applications in turbine blades. A dimensionless number can be found that characterizes the contact extensively. Several friction hysteresis measurements are conducted on a special test rig in a systematic manner exploring a large parameter space for the derived dimensionless number. Based on the experiments, it is concluded that the normalized measured friction hysteresis loops show similitude despite being measured with parameters spanning a wide range. It results in the possibility to design friction hysteresis tests for friction damped turbine blades in a simple and representative way.
UR - http://www.scopus.com/inward/record.url?scp=85105690886&partnerID=8YFLogxK
U2 - 10.1115/1.4044481
DO - 10.1115/1.4044481
M3 - Article
VL - 141
JO - Journal of Engineering for Gas Turbines and Power
JF - Journal of Engineering for Gas Turbines and Power
SN - 0742-4795
IS - 12
M1 - 121023
ER -