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Assessment of Research Needs for Wind Turbine Rotor Materials Technology
Figure 4-1
Commonly used early HAWT airfoils
68
Figure 4-2
SERI advanced wind turbine airfoils
68
Figure 4-3
Nine-meter GRP wind turbine blade
70
Figure 4-4
Eleven-meter wood/epoxy blade airfoil thickness distribution and planform
70
Figure 4-5
Flanged GRP blade root design
71
Figure 4-6
Flanged root design limitation due to steel/GRP strain incompatibility
73
Figure 4-7a
Bonded steel root tube GRP hub design
74
Figure 4-7b
Wood/epoxy blade root
74
Figure 4-8
All-wood/epoxy composite hub
76
Figure 5-1
UH-1H composite main rotor blade
85
Figure 5-2
RTM cooling tower blade
86
Figure 5-3
4BW hingeless bearingless rotor
88
Figure 6-1
Wind turbine drive train
92
LIST OF TABLES
Table 2-1
Blade Sectional Analysis Codes
30
Table 3-1
Typical Properties of Fibers
36
Table 3-2
Typical Properties of Unidirectional Composites
37
Table 3-3
Properties of Case Resins
41
Table 3-4
High-Performance Thermoplastics Used as Matrix Resins
43
Table 3-5
Trade-offs Between Thermosets and Thermoplastics as Matrices
44
Table 3-6
Typical Static Strength, Type 110 Laminate
53
Table 6-1
Control Effectors and Sensors for a Pitch Controlled Wind Turbine
92
