JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 38

FEATURE “Wind Energy” Characteristics of each blade in a rotor with different blade numbers Figures 10 to 12 show the power coefficient characteristics for tapered blades, while Figures 13 to 15 show those for inversely tapered blades. For both tapered and inversely tapered types, the maximum power coefficient is obtained at the greatest chord length. With regard to the number of blades, the five-bladed rotor has the highest maximum power coefficient. g…/… An experimental study of rotor shapes: for small horizontal-axis wind turbines highest torque coefficient is obtained for the two-bladed rotor and the maximum torque coefficient decreases with the number of blades. However, the tip-speed ratio corresponding to each maximum torque coefficient increases with the number of blades. The maximum power coefficient is over 0.38 for a 2- to 5-bladed rotor, but under 0.3 for a 6-bladed rotor. The highest power coefficient, Cpmax=0.39, is obtained for the 3-bladed rotor when λ=4.06. For the inversely tapered blades, Cp reached 0.38 for the two-bladed rotor when λ=3.72. Fig. 9: Power coefficient of inversely tapered types. Fig. 6: Layout of the experimental apparatus. Fig. 10: Power coefficient of the 202 tapered type. Fig. 7: Torque coefficient of tapered types (λ=3.4). Fig. 11: Power coefficient of the 302 tapered type. Fig. 8: Power coefficient of tapered types. In addition, the inversely tapered blades show an obvious increase of power coefficient with the number of blades compared to normally tapered blades. These results show that jec composites magazine / No54 January 2010

JEC COMPOSITES MAGAZINE - Issue #54 - January 2010

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #54 - January 2010

Cover
Editorial
Contents
NEWS WORLDWIDE
Companies
- Focus Aeronautics
- Jushi lets its ambitious plans out of the bag
- Dedienne Multiplasturgy Group marches on
Agenda of events
Equipment : Software
- SigmaNEST saves £70,000 in composites manufacturing
BUSINESS
Market survey
- A market with a rosy future
Niche market
- High-tech first at NASA: a crew module structure made of composite materials
Human capital
- The graduate with a degree in composite materials
FEATURE - WIND ENERGY
China
- China: No slown in global wind developments as country continues expansion
Fibre
- High-performance E6 glass fibre: Meeting the needs of the wind energy industry
Foam
- Infusion moulding structural panels
- New PET foams for wind turbine construction
Epoxy
- Blade length: Top-end limits are set by the materials
Manufacturer
- SHFRP: still limited as a player
Equipment
- Epoxy-resin infusion systems for wind-blade manufacturing
- Workflow optimization for rotor blades manufacturing
- New robotic wind-blade finishing system reduces work time by 90%
Small wind turbines
- An experimental study of rotor shapes: for small horizontal-axis wind-turbines
Maintenance
- Predictive maintenance in the wind energy industry
USERS’ PLATFORM
Composites in the world
- The world’s most environmentally friendly aircraft
- Bicycling enthusiasts can adjust bike parts themselves
- Champagne!!!
Successful partners
- High-pressure hydrogen storage tanks made by RTM
Application
- Lightweight, ultra-durable air cargo containers
- Solar Plane takes of
- First solar-powered speedboat
KNOW-HOW
Laser projection
- Recent innovations in laser templating
Nanochemicals
- LEO semi-solid resin film
Mould
- DEMOCRAT, an electrostatic process
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - Cover
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 2
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - Editorial
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - Contents
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 5
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 6
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Focus Aeronautics
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 8
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Jushi lets its ambitious plans out of the bag
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 10
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Dedienne Multiplasturgy Group marches on
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 12
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 13
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 15
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - SigmaNEST saves £70,000 in composites manufacturing
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 17
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - A market with a rosy future
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - High-tech first at NASA: a crew module structure made of composite materials
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - The graduate with a degree in composite materials
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 21
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - China: No slown in global wind developments as country continues expansion
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 23
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - High-performance E6 glass fibre: Meeting the needs of the wind energy industry
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 25
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Infusion moulding structural panels
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - New PET foams for wind turbine construction
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Blade length: Top-end limits are set by the materials
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 29
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - SHFRP: still limited as a player
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Epoxy-resin infusion systems for wind-blade manufacturing
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Workflow optimization for rotor blades manufacturing
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 33
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - New robotic wind-blade finishing system reduces work time by 90%
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 35
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - An experimental study of rotor shapes: for small horizontal-axis wind-turbines
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 37
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 38
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 39
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Predictive maintenance in the wind energy industry
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 41
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Champagne!!!
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - High-pressure hydrogen storage tanks made by RTM
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Lightweight, ultra-durable air cargo containers
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Solar Plane takes of
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - First solar-powered speedboat
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 47
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - Recent innovations in laser templating
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 49
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 50
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 51
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 52
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - LEO semi-solid resin film
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 54
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 55
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - - DEMOCRAT, an electrostatic process
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 57
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 58
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 59
JEC COMPOSITES MAGAZINE - Issue #54 - January 2010 - 60
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