Search found 22 matches

by Alvaro.Olcoz
Sat Jun 08, 2019 5:29 am
Forum: Computer-Aided Engineering Software Tools
Topic: Simulation error for low turbulent values of wind velocity
Replies: 2
Views: 508

Re: Simulation error for low turbulent values of wind velocity

Dear Jason,
Thank you one more time for your help!
Best regards
by Alvaro.Olcoz
Tue Jun 04, 2019 3:10 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Simulation error for low turbulent values of wind velocity
Replies: 2
Views: 508

Simulation error for low turbulent values of wind velocity

Dear Jason, I am performing a batch of aeroelastic simulations under turbulent winds at several hub height average velocities, starting from 5 m/s (5 m/s, 7, 9,11...). With the lower ones, such us 5 m/s I suffer a crash in the simulations when Vx (at hub height) reaches minimum peaks, of about 2 m/s...
by Alvaro.Olcoz
Tue Jun 04, 2019 1:49 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Wind turbine does not alineate with incoming wind
Replies: 2
Views: 519

Re: Wind turbine does not alineate with incoming wind

Dear Jason,
Thank you one more time for your rapic reply.
You have been helpful as always.
Regards,
Alvaro Olcoz
by Alvaro.Olcoz
Mon May 27, 2019 3:10 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Wind turbine does not alineate with incoming wind
Replies: 2
Views: 519

Wind turbine does not alineate with incoming wind

Dear Jason, I have been doing some FAST V8 simulations for a SWT based on the SWRT CertTest data and I have encountered some behaviour that I am sure you could send me help about. The turbine is a 3 bladed, with twisted,tapperded 3.22 m long blades, and I have used the tail geometry of the SWRT furl...
by Alvaro.Olcoz
Thu Apr 25, 2019 3:12 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Some questions about PreComp
Replies: 0
Views: 863

Some questions about PreComp

Dear Jason, I have encountered some doubts when using PreComp in order to find sectional properties of an own blade design for the first time. I will number them in order to make it easier for you to answer: 1) Regarding the ply concept, as I am not a native speaker, I dont know if I understand it w...
by Alvaro.Olcoz
Fri Apr 12, 2019 12:15 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Better understanding of TipClrnc and non-interference validation
Replies: 2
Views: 631

Re: Better understanding of TipClrnc and non-interference validation

Thank you, as always, for your answer and help Jason.
Best regards
by Alvaro.Olcoz
Wed Apr 10, 2019 3:10 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Better understanding of TipClrnc and non-interference validation
Replies: 2
Views: 631

Better understanding of TipClrnc and non-interference validation

Dear Jason, After understanding the physical significance of the channel Tip-tower clearance (TipClrnc) over the 360º azimuth angle, it is clear that the only interesting region for no interference validation is when the blade points down. My question is, does FAST v8 take into account the thickness...
by Alvaro.Olcoz
Fri Mar 22, 2019 1:26 pm
Forum: Computer-Aided Engineering Software Tools
Topic: From BModes output to FAST (Blade file)
Replies: 2
Views: 616

Re: From BModes output to FAST (Blade file)

Dear Jason,
Thank you very much for your rapid help one more time!
Best regards,
Alvaro
by Alvaro.Olcoz
Wed Mar 20, 2019 10:32 pm
Forum: Computer-Aided Engineering Software Tools
Topic: From BModes output to FAST (Blade file)
Replies: 2
Views: 616

From BModes output to FAST (Blade file)

Dear Jason, I am currently trying to reproduce in BModes the mode shapes available in FAST v8 CertTest of the SWRT machine in order to learn and be able to define my own baldes' in the future. As you stated in other posts, I have selected the blade sectional properties in order to obtain the uncoupl...
by Alvaro.Olcoz
Wed Mar 13, 2019 3:25 pm
Forum: Computer-Aided Engineering Software Tools
Topic: FAST theory manual
Replies: 218
Views: 27017

Re: FAST theory manual

Dear Jason,

I would be very pleased if I could have the unofficial copy of "FAST theory manual".
My e-mail is: alvaroolcoz94@gmail.com
Best regards,

Alvaro Olcoz
by Alvaro.Olcoz
Wed Mar 06, 2019 12:22 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Simple VS implementation into FAST v8
Replies: 4
Views: 665

Re: Simple VS implementation into FAST v8

Dear Jason,
Thank you very much for your help.
Very best regards
Alvaro Olcoz
by Alvaro.Olcoz
Mon Mar 04, 2019 9:17 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Simple VS implementation into FAST v8
Replies: 4
Views: 665

Re: Simple VS implementation into FAST v8

Dear Jason, Thank you again for your rapid answer. I definetely think that the VSContrl=1 will work for my implementation. Considering the region 2, I agree that I will need to set the constant value VS_Rgn2K to obtain a constant TSR and mantain Cp at its optimum value. I know that the transition re...
by Alvaro.Olcoz
Thu Feb 28, 2019 6:26 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Simple VS implementation into FAST v8
Replies: 4
Views: 665

Simple VS implementation into FAST v8

Dear all, I have performed the aerodynamic design of a SSWT using the steady state BEMT equations stated in AeroDyn Theory Manual and I have then compared my own code results with WT_Perf ones obtaining a very good correlation. The turbine's power control system is VS-FP, so in the WT_Perf model inp...
by Alvaro.Olcoz
Fri Jan 18, 2019 2:01 pm
Forum: Airfoils
Topic: Viterna polar extrapolation method (alpha_s)
Replies: 6
Views: 1381

Re: Viterna polar extrapolation method (alpha_s)

Dear Jason,
Thank you one more time for your response.
Best regards,
Alvaro Olcoz
by Alvaro.Olcoz
Mon Jan 14, 2019 7:04 pm
Forum: Airfoils
Topic: Viterna polar extrapolation method (alpha_s)
Replies: 6
Views: 1381

Re: Viterna polar extrapolation method (alpha_s)

Dear Jason, Regarding the 3d correction for airfoil data I finally wrote an own MATLAB script in which I applied Snel et ali.'s correction model. Now I have also implemented an extrapolation to -180º +180º using the Viterna method and this has created me a doubt: Initially I only applied the 3d corr...

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