Hi,
I am a little bit confused because the gustoutput from IECWind v5.01.02 and my calculations are showing differences.
The “IEC.ipt” whih is included in IECWind with give me this result for EOGR-2.0 (8m/s):
!This file was generated by IECwind v5.01.02 (13-Sep-2012).
! Wind condition defined by IEC 61400-1 3rd EDITION.
! for IEC Turbine Class 2 and IEC Turbulence Category b
!----------------------------------------------------------
! Rotor diameter = 80.0 m.
! 80.0 m hub-height yields 42.0 m turbulence scale.
!----------------------------------------------------------
! IEC Condition: Extreme Operating Gust.
! Stats for this wind file:
! The transient occurs over 10.5 seconds.
!
! The maximum gust speed is 3.331 m/s.
! The maximum total wind speed is 11.331 m/s.
! This maximum occurs at 45.250 seconds.
!
! The wind inflow inclination angle is 0.0 degrees to the horizontal.
This is my calculation:
Sigma1 = Iref*(0.75Vhub+b) = 0.14(0.75*8+5.6) = 1.62 m/s
Vgust = 3.3 (Sigma1/(1+0.1(D/Lambda1))) = 3.3 (1.62/(1+0.1(80/42))) = 4.5 m/s
The other Vgust formula is higher then this one, thats why i only write the formula.
Can someone see the failure?
