UFC 4-159-03
3 October 2005
Table 4-2. Sample Wind Coefficients for Ships
SHIP
C
NOTES
Hull dominated
0.82
Aircraft carriers, drydocks
Typical
0.92
ships with moderate superstructure
Extensive
1.02
superstructure
The shape function for the transverse wind force (NCEL, TN-1628) is
given by:
f yw {θ w
}=
+ (sinθ w - 0.05* sin{5θ w }) / 0.95
EQUATION:
(4)
where
f yw {θ w } = transverse wind coefficient shape function
θw
= wind angle (degrees)
Equation 4 is positive for wind angles 0 < θw < 180 degrees and negative
for wind angles 180 < θw < 360 degrees. Figure 4-4 shows the shape and typical
values for Equation 4.
These two components were derived by integrating wind over the hull and
superstructure areas to obtain effective wind speeds (NCEL, TN-1628). The following
example illustrates calculations of the transverse wind force drag coefficient.
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