Acoustic Emission Monitoring of Small Wind Turbine Blades

[+] Author and Article Information
P. A. Joosse

Delft University of Technology, WMC-Group, Stevinweg 1, 2628 CN Delft, The Netherlandse-mail: p.a.joosse@citg.tudelft.nl

M. J. Blanch, A. G. Dutton

Energy Research Unit, CLRC Rutherford Appleton Laboratory (CLRC-RAL), Chilton, Didcot, Oxon OX11 0QX, UK

D. A. Kouroussis

Envirocoustics Abee, El. Venizelou 7 and Delfon, Metamorphosi, Athens 14452, Attica, Greece

T. P. Philippidis

Dept of Mechanical Engineering & Aeronautics, University of Patras, P.O. Box 1401, Patras 265 00, Greece

P. S. Vionis

CRES, Wind Energy Department, 19th km Marathon Avenue, Pikermi 19009, Attica, Greece

J. Sol. Energy Eng 124(4), 446-454 (Nov 08, 2002) (9 pages) doi:10.1115/1.1509769 History: Received March 01, 2002; Revised August 01, 2002; Online November 08, 2002
Copyright © 2002 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Definition of the major AE hit characteristics
Grahic Jump Location
AE static certification test load profile
Grahic Jump Location
Inside view of blade 9 (post mortem, leading edge at right side)
Grahic Jump Location
Sketch of the blade root connection
Grahic Jump Location
Instrumentation plan for some of the DUT/RAL tests
Grahic Jump Location
Initial loading of virgin blade 1 to OL and repeat-load profile (top); cumulative AE hits (center-load superimposed); AE signal energy (bottom-load superimposed)
Grahic Jump Location
Non-critical damage at blade root (blade 6, fatigue)
Grahic Jump Location
Comparison of emission levels from 15 kN ELs during the blade 5 static test to failure-load profile (top); hits per channel (center); AE signal energy (bottom)
Grahic Jump Location
AST energy at receiving channel at start of test and after each load-hold cycle (blade 2)
Grahic Jump Location
Crack in blade 5 at 1.7-m radius (see pen and markings)
Grahic Jump Location
Individual channel cumulative AE events versus time, with load superimposed for channel numbers (Ch.#) on blade 1
Grahic Jump Location
Example for static load test envelope to evaluate AE procedures and EL and MTL sensitivity
Grahic Jump Location
Damage progression expressed as linear located events for blade 4; top: during MTL tests, bottom: during EL tests
Grahic Jump Location
Blade 9, fractured in static loading at the defect zone
Grahic Jump Location
Idealized load history of blade 6
Grahic Jump Location
Failed section of blade 6
Grahic Jump Location
Amplitude history of linearly located events during slow cycles for blade 6




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In