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EOG with IECWind v5.01.02

Posted: Sat Oct 05, 2019 2:10 am
by Kemal.Kartal
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):

Code: Select all

!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*(0.75*Vhub+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?

Re: EOG with IECWind v5.01.02

Posted: Sat Oct 05, 2019 6:09 am
by Kemal.Kartal
Found the problem:

Image