## EOG with IECWind v5.01.02

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Kemal.Kartal
Posts: 41
Joined: Mon Jan 11, 2016 5:01 am
Organization: self
Location: Germany

### EOG with IECWind v5.01.02

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?

Kemal.Kartal
Posts: 41
Joined: Mon Jan 11, 2016 5:01 am
Organization: self
Location: Germany

### Re: EOG with IECWind v5.01.02

Found the problem:

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