Search found 4 matches

by Huseyin.Can.Onel
Thu Sep 05, 2019 1:50 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Turbulent length scales and LES grid size in ALM simulations
Replies: 0
Views: 1298

Turbulent length scales and LES grid size in ALM simulations

I have been searching through the research done on ALM and noticed that most of the researchers use 30 to 60 cells per rotor radius in LES simulations. This looks like an extremely coarse grid size for LES, not to mention that I am quite confused about the calculation of turbulent length scales in A...
by Huseyin.Can.Onel
Thu Nov 01, 2018 11:56 am
Forum: Computer-Aided Engineering Software Tools
Topic: Deciding mesh size and time step in Actuator Line Model simulations
Replies: 2
Views: 1429

Deciding mesh size and time step in Actuator Line Model simulations

Hello everyone, According to my (quite short) experience with ALM simulations of wind turbines, determination of the cell size in rotor plane and time step size plays an important role in the convergence and agreement with experimental measurements. There are many turbines in various sizes and opera...
by Huseyin.Can.Onel
Sun Oct 07, 2018 7:01 am
Forum: Rotor Aerodynamics
Topic: NREL 5-MW reference turbine - CP, CQ, CT Coefficients
Replies: 35
Views: 77623

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

Hello again, I've been working on NREL-5MW wind turbine and there is something bugging me. This turbine is rated at wind speed = 11.4m/s and TSR = 7 (as stated here: https://www.nrel.gov/docs/fy09osti/38060.pdf) for 5MW of power. Examining the document and assuming this is an offshore wind turbine, ...
by Huseyin.Can.Onel
Sun May 13, 2018 4:56 am
Forum: Rotor Aerodynamics
Topic: NREL 5-MW reference turbine - CP, CQ, CT Coefficients
Replies: 35
Views: 77623

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

Mr Jonkman, I am running some incompressible CFD simulations of NREL 5MW reference turbine using Actuator Line method, solving RANS equations with k-epsilon model. Power and torque values I obtain for the same conditions are consistently a bit lower than results you present using FAST software. I kn...

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