CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   FLUENT (https://www.cfd-online.com/Forums/fluent/)
-   -   Turbine simulation (https://www.cfd-online.com/Forums/fluent/114980-turbine-simulation.html)

 Gerim55 March 21, 2013 02:17

Turbine simulation

Hi
I am trying to simulate a simple hydroturbine (2D) and I have some basic questions about it:
1) In this case turbine rotated by water and i don't know even approximately turbine's rate of rotation. So first goal of my simulation is to define it. From forum i know that there are few ways to solve such problem but i've not found any tutorials or help topic or some recomendations. Can somebody help me, maybe by posting links or etc?
2 ) Is it correct, when i want to define turbine's rate of rotation in the first simulation and then simulated a process with fixed number of revolution of turbine?

 jthiakz March 21, 2013 05:26

Good Attempt, I appreciate your way thinking started from real physical aspect.

To can get an idea about CFD modeling of flow in compressor /turbine.
Pls check CFX Turotial-4. Flow in an Axial Rotor/Stator

 Gerim55 March 21, 2013 07:10

Quote:
 Originally Posted by jthiakz (Post 415442) Good Attempt, I appreciate your way thinking started from real physical aspect. To can get an idea about CFD modeling of flow in compressor /turbine. Pls check CFX Turotial-4. Flow in an Axial Rotor/Stator

how i know, using this tutorial we should specify a rate of rotation. But I don't know this parametre and my goal is to define it

 oj.bulmer March 21, 2013 07:28

Well, since it's a turbine, isn't its rotational speed something an effect, rather than a cause? How about simulating a transient simulation by defining water flow rate etc and letting the software find it out? It would be a motion simulation though, and hence tricky.

OJ

 Gerim55 March 21, 2013 07:39

Quote:
 Originally Posted by oj.bulmer (Post 415472) Well, since it's a turbine, isn't its rotational speed something an effect, rather than a cause? How about simulating a transient simulation by defining water flow rate etc and letting the software find it out? It would be a motion simulation though, and hence tricky. OJ
I think it's a right way! but i don't know how simulate such transient simulation...

 Gerim55 March 21, 2013 08:19

And if we use another way - assume a speed and work out the torque. Sweep over a range of speeds and find the point where torque equals the output load (c) ghorrocks -http://www.cfd-online.com/Forums/cfx/87150-wind-turbine-rotation-baldes.html

How find the point, where torque equals the output load?

 All times are GMT -4. The time now is 18:36.