Search found 14 matches

by Sebastian.Hippel
Thu Sep 26, 2019 6:39 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, Actually I’m very new with VS. Can you provide me with more information about how to stepping through the solation with the debugger. I already generate an OpenFAST_Debug.exe file and I read the instructions for debugging with Visual Studio. But I still don’t know how to navigate the deb...
by Sebastian.Hippel
Tue Sep 24, 2019 8:09 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, Unfortunately, the change of both parameters (mass per unit length, p%MassB(K,J), and mass per element, p%ElmntMass(J,K)) doesn’t mad any changes in the result. The result still identical even when I used your cod in the previous post. Actually I’ve two comprehension questions about the ...
by Sebastian.Hippel
Mon Sep 23, 2019 3:19 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, Thank you for your quick response. Regarding to the first part of my question: after the modifications in open FAST and ElstoDyn (see my post in Jun 05, 2019) I can’t see any changes in the results of TEST 18, the results were identical Now I changed the time of calling of Suroutine AddM...
by Sebastian.Hippel
Fri Sep 20, 2019 5:59 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, First of all thank you very much for your help. After changing the AddMass Subroutine to Public, I could compile FAST with VS without errors. To check if the compiled .exe recognise the changes that I’ve done in ElastoDyn. I performed TEST 18 (5MW_Land_DLL_WTurb) for 10 s as TMax and wi...
by Sebastian.Hippel
Wed Jun 05, 2019 8:46 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, I add a routine to ElastoDyn.f90 to perform the mass addition to blade elements as follows: !********************************************************************************************************************************** !> This routine is used to add mass to blade elements at a given...
by Sebastian.Hippel
Fri May 24, 2019 3:33 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, I tried to modify the Blade element mass during the simulation by adding a time condition in the SOUBROUTINE Coeff() as below: IF (t > 5) THEN ! Add mass to blade Element at simulation time 5 [s] p%BElmntMass(J,K) = 1.5*p%MassB(K,J)*p%DRNodes(J) ! Mass of blade element J Multiples by 1.5...
by Sebastian.Hippel
Fri May 10, 2019 1:42 am
Forum: Airfoils
Topic: Making fault
Replies: 31
Views: 8073

Re: Making fault

Dear Jason, I'm intending to do similar thing what Yichau.Li already tried to do. I'm trying to change the blade mass properties dynamically within a given simulation. I know such changes is not possible without changing the source code. But I'm just wondering which source code must be changed, to c...
by Sebastian.Hippel
Wed May 23, 2018 4:03 am
Forum: Rotor Aerodynamics
Topic: turbine aerodynamics for time independet computing
Replies: 3
Views: 2595

Re: turbine aerodynamics for time independet computing

Dear Jason, Thank you very much for the fast replay, Actually I wanted to ask you from my previous question if it’s possible with AeroDyn to deactivate the aerodynamic inertia. For this reason I looked for the aerodynamic effects which could include this air inertia. What I think the most inertia of...
by Sebastian.Hippel
Tue May 22, 2018 5:29 am
Forum: Rotor Aerodynamics
Topic: turbine aerodynamics for time independet computing
Replies: 3
Views: 2595

turbine aerodynamics for time independet computing

Hello everyone, Is that possible to perform a simulation with FAST & Aerodyn for computing turbine aerodynamics independent of dynamic (Time) coupling, so that at the end the thrust coefficient (CT), and torque coefficient (CQ) are independent for each operation point and as only a function of t...
by Sebastian.Hippel
Fri Mar 10, 2017 1:04 am
Forum: Computer-Aided Engineering Software Tools
Topic: Atmospheric Ice Accretion On The Blades
Replies: 15
Views: 4473

Re: Atmospheric Ice Accretion On The Blades

Thanks a lot Jason for your help!

Best regards,

Sebastian
by Sebastian.Hippel
Thu Mar 09, 2017 10:11 am
Forum: Computer-Aided Engineering Software Tools
Topic: Atmospheric Ice Accretion On The Blades
Replies: 15
Views: 4473

Re: Atmospheric Ice Accretion On The Blades

Dear Jason, thanks for your really fast reply! Do you know if there is a possibility to change the BMassDen during simulation? For example: At the beginning of the simulation an additional mass, m_add , contributes to the blade root. During simulation this mass linearly decreases at the blade root b...
by Sebastian.Hippel
Thu Mar 09, 2017 9:23 am
Forum: Computer-Aided Engineering Software Tools
Topic: Atmospheric Ice Accretion On The Blades
Replies: 15
Views: 4473

Re: Atmospheric Ice Accretion On The Blades

...Icing is typically modeled with increased blade mass... Dear Jason, I am currently facing some small problems and I hope we can figure them out. As I want to model some additional mass in a rotor blade, I changed the mass density in the blade input file. I increased the mass density of the last ...
by Sebastian.Hippel
Mon Nov 23, 2015 2:21 am
Forum: Rotor Aerodynamics
Topic: NREL 5-MW reference turbine - CP, CQ, CT Coefficients
Replies: 27
Views: 71077

Re: NREL 5-MW reference turbine - CP, CQ, CT Coefficients

Hello! The mentioned problem could be solved by the hints given in the follwing forum topic: https://wind.nrel.gov/forum/wind/viewtopic.php?f=2&t=917 --> The sensor "RotThrust" is not the aerodynamic thrust as it includes gravity and inertial loads. As a result, I was able to calculate...
by Sebastian.Hippel
Tue Nov 17, 2015 2:46 am
Forum: Rotor Aerodynamics
Topic: NREL 5-MW reference turbine - CP, CQ, CT Coefficients
Replies: 27
Views: 71077

Re: NREL 5-MW reference turbine - CP, CQ, CT Coefficients

Dear all, thank you for your posts which helped me a lot to calculate the aerodynamic coefficients for different pitch angles. I used the FAST model input file which Rannam suggested on 15 March 2012. Assuming wind speed to be constant (v_w =8m/s), a Tip Speed Ratio (TSR) of 5 to 10 (step 1) and Pit...

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