|
[Sponsors] |
![]() |
![]() |
#1 |
New Member
sungkue oh
Join Date: Oct 2023
Posts: 2
Rep Power: 0 ![]() |
A typical MRF will take an RPM and use a formula like torque_z()@Blade to get a torque or power value.
I want to do the opposite. I want to fix the Torque value to 25 and have the RPM calculated at that time, but I don't know how. What should I do? ![]() |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,816
Rep Power: 144 ![]() ![]() ![]() ![]() |
Sweep a range of RPM values with a series of simulations and you will get a Torque versus RPM curve. Then interpolate on the curve to find the RPM which gives you the torque you want.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
|
![]() |
![]() |
![]() |
![]() |
#3 | |
New Member
sungkue oh
Join Date: Oct 2023
Posts: 2
Rep Power: 0 ![]() |
Quote:
I want the CFX, which is being calculated like a dynamic program, to adjust the RPM to match the power. |
||
![]() |
![]() |
![]() |
![]() |
#4 |
Senior Member
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,885
Rep Power: 27 ![]() |
This has been asked very often and I have never seen a solution. CFX is not as dynamic as you expect. It has no control mechanism with a feedback loop from generated torque to input RPM. I think mainly since there not easy damping available like in a PID Controller.
Better follow Glenn's approach. Last edited by Gert-Jan; October 24, 2023 at 08:15. |
|
![]() |
![]() |
![]() |
![]() |
#5 | |
Senior Member
Join Date: Jun 2009
Posts: 1,850
Rep Power: 33 ![]() |
Quote:
The tool should be irrelevant to your goal.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
||
![]() |
![]() |
![]() |
Tags |
mrf, pressure base rpm |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Fatal error | Echidna | CFX | 4 | September 13, 2016 05:50 |
Problem with an old Simulation | FrankW | CFX | 3 | February 8, 2016 04:28 |
[foam-extend.org] problem when installing foam-extend-1.6 | Thomas pan | OpenFOAM Installation | 7 | September 9, 2015 21:53 |
Torque Converter Pump Torque = Engine Torque? | Torque_Converter | Main CFD Forum | 4 | November 12, 2012 06:44 |
Fundamental output format control of field values and time | dbxmcf | OpenFOAM | 1 | January 12, 2011 10:50 |