|
[Sponsors] |
November 12, 2019, 20:54 |
Hovering rotor thrust coeff values
|
#1 |
New Member
Karthik
Join Date: Mar 2019
Posts: 3
Rep Power: 7 |
Hi,
I have been trying to simulate a hovering rotor case of Caradonna and tung. I used overset mesh to prescribe rotation (Rigid body rotation) to the rotor blades. I have obtained thrust coeff value for the case and it is 100% greater than the experimental value. I have even obtained mesh convergence results and have been using a time step of 1 degree rotation. If anything rings a bell please let me know. I believe I am using right setup as following literature but not sure where its going wrong. Just to clarify: collective pitch angle of 8 degree means each rotor blade has a pitch angle of 8 degree right ? Thanks |
|
November 13, 2019, 03:28 |
|
#2 |
New Member
demirel suleyman
Join Date: Apr 2017
Location: Turkey
Posts: 28
Rep Power: 9 |
Hello,
I am working for a while at a VAWT concept and I used the same procedure with overset mesh and DFBI and works well. I did validated my simulation results with experimental data. Pay attention that the maximum rotation allowed in one time-step should be max of the smallest cell size from the overset mesh, not 1 degree of rotation. In the beginning I had problems with with the power output because of the DFBI inertia moments, my input was wrong. I calculated them again and the results improved. Good day, dmirel |
|
November 13, 2019, 07:59 |
|
#3 |
Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
Posts: 438
Rep Power: 18 |
||
November 14, 2019, 12:05 |
|
#4 |
New Member
demirel suleyman
Join Date: Apr 2017
Location: Turkey
Posts: 28
Rep Power: 9 |
Cwl,
For some people is enough, for others is not but I did not said that is not enough dmirel |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Setting patch field values equal to internal field values | leroyv | OpenFOAM Programming & Development | 1 | October 21, 2014 16:49 |
Loading Cell Values in Tecplot | P1361 | OpenFOAM Post-Processing | 3 | September 16, 2014 05:02 |
cell values vs node values | reversemermaid | FLUENT | 0 | March 13, 2014 19:06 |
strange node values @ solid/fluid interface - help | JB | FLUENT | 2 | November 1, 2008 13:04 |
Plotting raw data values | Wilesco | Siemens | 0 | January 5, 2006 06:34 |