Sandia 2014 Wind Turbine Blade Workshop- Standish

Siemens Rotor R&D:
An OEM Perspective
Siemens Energy, Inc. - Boulder, CO USA
Restricted © Siemens AG 2014 All rights reserved.

Motivation
Future of wind power requires reducing the LCOE
from wind to be directly competitive with traditional
energy sources without subsidies.
• Why wind? Æ Why not wind?
Blades are a small fraction of the total cost, but
generate 100% of the AEP, and produce the majority
of the design-driving loads.
• Loads = Material = Cost
Nearly all advances in blade design and technology
have resulted from the combined efforts between
academia, research institutions, and industry!
• Innovation is collaborative!
2014-Aug-26 Restricted Page 2 © Siemens AG 2014 All rights reserved. Boulder Wind R&D

Agenda
Blade technology performance and validation:
Laboratory Testing
• Structural testing
• Aerodynamic wind tunnel testing
• Aeroacoustic wind tunnel testing
Field Testing
• Acoustic field-testing
• Oil-flow visualization
• Tuft Flow visualization
• Aeroelastic deformations
• NREL-SWP CRADA research turbine
• Extreme gust event
Research areas of interest:

Laboratory Testing & Validation

Structural Testing
Coupon Level Element or Panel Level Simple substructure Complex substructure Full Scale
Mfg. Design Testing

Aerodynamic Wind Tunnel Testing

Acoustic Wind Tunnel Testing
70
65
60
55
50
45
40
35
Airfoil
Flow
Configuration 1 Configuration 2
100 1000 10000
SPL [dBA re. 20e-6 Pa]
Frequency [Hz]

Field Testing & Validation

Acoustic Field Testing

Oil-Flow Visualization

Tuft Flow Visualization
Clean leading edge
Soiled leading edge
Attached flow Separated flow
Vortex
generators

Tip-Root Blade Perspective
Two Go-Pro cameras facing inboard/outboard
Static load testing for g-loading

ATB Deflection Validation
Imaging
Leading edge targets
Trailing edge

ATB Deflection Validation
Root strain gauge
Image-based flap defl.

NREL-SWP CRADA Test Turbine

NREL-SWP CRADA – 108m Rotor

NREL-SWP CRADA – Highlights

NREL-SWP CRADA – Highlights
• Pressure System
• Validating key aero data (360Ý Airfoil
Polars, Vortex Shedding, Etc)

NREL-SWP CRADA – Overspeed Event
Extreme Overspeed – January 13th 2014
Inflow
• Wind Gust: 6m/s to 35 m/s over 6 seconds
• Direction Change: 90 degrees
Turbine
• RPM: 153% of nominal RPM (tip speed ~135 m/s!)
• Yaw Change: 25 degrees over 7 seconds (0.5 deg/sec capability)
• Overspeed triggered (Software & Hardware)
Measurement Systems Operational During Event
• Standard load channels
• Fiber Bragg Strains in Blade B
• Pressure System in Blade C

NREL-SWP CRADA – Overspeed Event

Research Interests

How Can Research Advance Industry?
Universities and research laboratories possess a wealth of knowledge,
experience, and opportunity. However, direct cooperation, communication
and collaboration with OEMs is rather limited.
• Improve interface between industry and the
research community
• Openly share non-proprietary information
on our challenges and our successes
• Maturing viable technologies to a higher
degree to facilitate industry implementation

Research Areas of Interest
Wind-Specific Materials Research
• Failure under long-term enviromental exposure, multi-axial static and
fatigue, scaling relationships, improved resins for fatigue
Structural Modeling
• Non-linear behavior during deformations, aero-structural
optimization (airfoils & planforms)
Blade Soiling
• ~3-5% AEP impact!, Improved computationald and laboratory
modeling
Airfoil analysis methods for wind
• Simulate VGs, flatback airfoils, trailing edge add-ons, multi-element,
etc.
Aeroacoustics
• Simple, fast, robust, semi-empirical methods!
3D & Dynamic Effects
• Improved 3D & dynamic corrections for BEM
Vortex Codes
• Improved accuracy with realistic speed compared to BEM
Turbulence Modelling
• Improved correlation between measurement and models

Conclusion
Steps towards reducing wind power LCOE will require significant
contributions from both industry and the research community
• Increase communication & collaboration
• Improve our modeling tools & methods
• Improve our field-validation techniques
Solutions must be simple, robust, and cost-effective
• Mature promising technologies in a timely manner

Acknowledgements
Many thanks to the SWP team and to
NWTC for their continued support!

Thank you for your attention!
Any questions?

Sandia 2014 Wind Turbine Blade Workshop- Standish

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (20)

Similar to Sandia 2014 Wind Turbine Blade Workshop- Standish

Similar to Sandia 2014 Wind Turbine Blade Workshop- Standish (20)

More from Sandia National Laboratories: Energy & Climate: Renewables

More from Sandia National Laboratories: Energy & Climate: Renewables (20)

Recently uploaded

Recently uploaded (20)

Sandia 2014 Wind Turbine Blade Workshop- Standish