Paper Title:
Acoustic Techniques for Wind Turbine Blade Monitoring
  Abstract

The total electrical generation capacity from wind sources in the International Energy Agency (IEA) Wind Member Countries has increased from 4 GW in 1995 to more than 51 GW in 2005 thus underlining the strategic importance of the resource. In the last year alone the UK increased its wind generation by 447 MW, an increase of 85% over that for the previous year. In 2004, wind generation formed just 0.5% of the national electric demand; this contribution is set to rise over the next few years with some predictions that wind energy will rise to 8% of the total UK demand by 2010. The rotor blades of a wind turbine system are a significant structural component of the overall system, and typically account for 30% of lifecycle costs, and contribute 34% to overall system downtime. Despite their importance, there is currently very little monitoring of the structural integrity of rotor components, and what does exist is limited. We perceive that especially with the current political and technological emphasis on offshore installations, there will be an increase in the perceived need for remote structural monitoring, and there is indeed currently great interest in this area from the wind turbine industry. This work focuses on the applications of acoustic techniques to assess the integrity of typical rotor blade structures. Preliminary results discuss the limiting aspects of acoustic based techniques based on the physics of acoustic wave propagation in typical structural components. Comparisons between acoustic emission approaches and conventional active ultrasound will be considered.

  Info
Periodical
Edited by
L. Garibaldi, C. Surace, K. Holford and W.M. Ostachowicz
Pages
639-644
DOI
10.4028/www.scientific.net/KEM.347.639
Citation
K. Burnham, G. Pierce, "Acoustic Techniques for Wind Turbine Blade Monitoring", Key Engineering Materials, Vol. 347, pp. 639-644, 2007
Online since
September 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jai Won Byeon, C.S. Kim, J.H. Song, S.I. Kwun
Abstract:For the quality monitoring and reliable application of stationary gas turbine blade (vane), near surface damages in the isothermally degraded...
1998
Authors: U. Straube, Giovanni Mazzolai, A. Biscarini, B. Coluzzi, Fabio M. Mazzolai, Horst Beige
Abstract:The ultrasound pulse echo overlap method has been used to determine the elastic stiffness coefficients and the corresponding ultrasonic...
63
Authors: Zhen Tian, Nai Ci Bing, Hong Yong Xie
Chapter 5:New Instruments and Sensors Development
Abstract:High-Resolution Ultrasonic Spectroscopy (HRUS) is a novel analytical technique for non-destructive material analysis for a wide range of...
146
Authors: Bo Zhao, Fan Chen, Jing Lin Tong
Chapter 7: Grinding and Non-Traditional Machining Technologies
Abstract:The nonlocal theory was introduced to establish the nonlocal constitutive model and analyze the effect of ultrasonic on the tensile strength...
456
Authors: Bo Zhao, Ping Yan Bian, Yu Li
Chapter 1: Grinding and Grinding Wheels
Abstract:Based on nonlocal theory, The effects of ultrasonic frequencies on the grinding force and nonlocal decay rate are obtained through the...
148