|
[Sponsors] |
Darrieus Wind Turbine - 2d CFD , abnormal results |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
March 24, 2019, 03:21 |
Darrieus Wind Turbine - 2d CFD , abnormal results
|
#1 |
New Member
Anonymous
Join Date: Mar 2019
Posts: 1
Rep Power: 0 |
Hello. We are trying to simulate darrieus wind turbine's rotating and find CM values.
But there is a problem. We trying to compare with experimental studies. In experimental studies, chord lenght 0.265 m, blade height 1.2 m and rotor dia. is 2 meter. So, in our study, we draw with 2 bades darrieus. Of course, we cant give a height to the blades, because we working 2d. Okey, we have 300000 mesh, sst k-w, transiet, mesh motion and give radial speed to the ring, others are fixed, and we have 8 m/s inlet wind speed, turbulance indensity 0.5 and lenght scale 0.0265m, blades are moving. But our results are too high from expected, sometimes too low. We try to catch 0.1 Cm value, because in experimental study Cp is 0.2 and TSR = 2 So, could be an error with our reference values ? Area = Diameter * Height = 2 m * 1,2 m Depth = Height, 1,2 m Lenght = Radius of rotor, 1 m I checked everything, interfaces, domain properties etc. But i dont understand what is the mistake.. Here is a picture, for 8 hours fluent could solve only for 240 degree, of course blade has to rotate 6-7 tours to be stationary but when i see this, i think it is impossible to catch 0.1 avarage value. It is still solving by the way Best regards, hope i can find an advice |
|
Tags |
cfd, darrieus, vawt |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Import external CFD results into Autodesk CFD for visualisation | julien.decharentenay | Autodesk Simulation CFD | 0 | May 31, 2014 21:16 |
Savonius Wind Turbine CFD | amianjan | FLUENT | 0 | February 16, 2014 08:27 |
Problem in conducting CFD of analysis of wind turbine blade | atulpat | CFX | 16 | August 17, 2013 05:09 |
need wind turbine data for cfd validation | Reggio | Main CFD Forum | 0 | September 9, 2012 12:30 |
ICEM CFD creating the grid of a Wind Turbine blade | Dan | CFX | 11 | June 1, 2012 15:11 |