On the influence of a five-hole-probe on the vibration characteristics of a low pressure turbine rotor while performing aerodynamic measurements

Florian Schönleitner, Thorsten Selic, Manuel Zenz, Franz Heitmeir, Andreas Marn

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

For many reasons it is essential to know and assess the flow field and its characteristics up- and downstream of a turbine stage. For these purpose measurements are conducted in test rigs such as the STTF-AAAI (subsonic test turbine facility for aerodynamic, acoustic, and aeroelastic investigations) at the Institute for Thermal Turbomachinery and Machine Dynamics at Graz University of Technology. A low pressure turbine is operated in engine relevant operating conditions. The turbine is experienced high mechanical loads and is excited to vibrate (forced response). In the rotor design process forced response predictions and structural assessments are performed. However, it is not common to include instrumentation (e.g. total pressure and temperature rakes, five-hole-probes, fast response aerodynamic pressure probes) in these forced response predictions. But, these measurement devices are essential and therefore this paper investigates the influence of such an instrumentation onto the vibrational behaviour of a low pressure turbine rotor of the STTF-AAAI. Several vibration measurements at distinct circumferential and radial positions of the five-hole-probe in the flow channel are conducted. These measurement results are compared to measurements performed without a five-hole-probe in the flow channel. A clear influence of the five-hole-probe on the vibration level is shown.

Originalspracheenglisch
Seiten (von - bis)196-207
Seitenumfang12
FachzeitschriftTechnische Mechanik
Jahrgang37
Ausgabenummer2-5
DOIs
PublikationsstatusVeröffentlicht - 2017

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Aerodynamics
Turbines
Rotors
Channel flow
Acoustics
Vibration measurement
Turbomachinery
Flow fields
Engines
Temperature

ASJC Scopus subject areas

  • !!Mechanics of Materials
  • !!Mechanical Engineering

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On the influence of a five-hole-probe on the vibration characteristics of a low pressure turbine rotor while performing aerodynamic measurements. / Schönleitner, Florian; Selic, Thorsten; Zenz, Manuel; Heitmeir, Franz; Marn, Andreas.

in: Technische Mechanik, Jahrgang 37, Nr. 2-5, 2017, S. 196-207.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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AU - Marn, Andreas

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