2025 SMSI Bannerklein

7.1 - Application of Fibre Optic Range-Resolved Interferometric Vibrometry to a Full-Scale Feathered Propeller in a Wind Tunnel

Event
ettc2018 - European Test and Telemetry Conference
2018-06-26 - 2018-06-28
Nürnberg, Germany
Chapter
7. AIM 2018
Author(s)
N. Lawson, T. Kissinger, S. James, R. Tatam - School of Aerospace, Transport and Manufacturing Cranfield University (United Kingdom), M. Finnis - Defence Academy, Cranfield University, Shrivenham (United Kingdom)
Pages
130 - 135
DOI
10.5162/ettc2018/7.1
ISBN
978-3-9816876-7-5
Price
free

Abstract

The vibration characteristics of a full scale Jetstream 31 turboprop propeller blade are analysed using a fibre optic range-resolved vibrometer. Using this vibrometer, a 1.2m length propeller blade was interrogated on the low pressure surface at selected spanwise positions. The spectral characteristics of the surface were recorded over wind tunnel speeds ranging from 5m/s to 30m/s in an attempt to decouple an expected aerodynamic shedding frequency from the natural structural frequency of the blade. However, the dominant frequency was found to be the natural frequency and no evidence of shedding aerodynamic frequencies were found using subsequent hot-wire anemometry measurements. Further work is planned to isolate structural and aerodynamic effects, including measurements adjacent to the aerofoil surface and a computation model.

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