Acoustic techniques for wind turbine blade monitoring

Research output: Contribution to conferencePaper

4 Citations (Scopus)

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.
LanguageEnglish
Pages639-644
Number of pages5
Publication statusPublished - 2007
Event7th International Conference on Damage Assessment of Structures - Torino, Italy
Duration: 25 Jun 200727 Jun 2007

Conference

Conference7th International Conference on Damage Assessment of Structures
Abbreviated titleDAMAS 2007
CountryItaly
CityTorino
Period25/06/0727/06/07
Other 25th to 27th June 2007

Fingerprint

Wind turbines
Turbomachine blades
Acoustics
Monitoring
Rotors
Acoustic wave propagation
Structural integrity
Acoustic emissions
Wind power
Physics
Ultrasonics
Costs
Industry

Keywords

  • acoustics
  • wind turbines
  • blade monitoring

Cite this

Burnham, K., & Pierce, S. G. (2007). Acoustic techniques for wind turbine blade monitoring. 639-644. Paper presented at 7th International Conference on Damage Assessment of Structures, Torino, Italy.
Burnham, K. ; Pierce, S.G. / Acoustic techniques for wind turbine blade monitoring. Paper presented at 7th International Conference on Damage Assessment of Structures, Torino, Italy.5 p.
@conference{7fbb8c3f295d4482b758b3dcab9c4ace,
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.",
keywords = "acoustics, wind turbines, blade monitoring",
author = "K. Burnham and S.G. Pierce",
year = "2007",
language = "English",
pages = "639--644",
note = "7th International Conference on Damage Assessment of Structures, DAMAS 2007 ; Conference date: 25-06-2007 Through 27-06-2007",

}

Burnham, K & Pierce, SG 2007, 'Acoustic techniques for wind turbine blade monitoring' Paper presented at 7th International Conference on Damage Assessment of Structures, Torino, Italy, 25/06/07 - 27/06/07, pp. 639-644.

Acoustic techniques for wind turbine blade monitoring. / Burnham, K.; Pierce, S.G.

2007. 639-644 Paper presented at 7th International Conference on Damage Assessment of Structures, Torino, Italy.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Acoustic techniques for wind turbine blade monitoring

AU - Burnham, K.

AU - Pierce, S.G.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - acoustics

KW - wind turbines

KW - blade monitoring

UR - http://dx.doi.org/10.4028/www.scientific.net/KEM.347.639

M3 - Paper

SP - 639

EP - 644

ER -

Burnham K, Pierce SG. Acoustic techniques for wind turbine blade monitoring. 2007. Paper presented at 7th International Conference on Damage Assessment of Structures, Torino, Italy.