2D Stator-Rotor Interaction

Muhammad Asim Sarwar · November 23, 2018, 20:30

Hi,

I am studying the profile losses of the rotor. I have created 2D stator and rotor and applied mixing plane between them.

I am confused about axis of rotation while giving frame motion to 2D rotor. In real scenario, the blades are moving in z-axis. However, in my case I have only 2 axis. In which axis, should I apply axis of rotation.

Secondly, I am also thinking about that can I give transnational velocity instead of rotational velocity. Since, it is a 2D domain, each rotor blades pass through the stator with some transnational velocity.

LuckyTran · November 30, 2018, 14:05

Use the translational velocity.

In general you can give a rotating frame motion in 2D, but not for your problem. I.e. your stator-rotor sits in the wrong plane.

Hamidzoka · December 1, 2018, 01:12

Hi Muhammad;
In case of 2D simulations rotation does not make sense.
In this cases normally rotation is replaced by translation. in other words rotating domain will be given a linear velocity the magnitude of which is r*omega. (r is radial distance of the 2D profile from turbine axis and omega is angular speed.)
For instance consider a 2D domain with reference frame of XY. If the axial(streamwise) direction is x, the so called velocity will be set in direction of Y. So everything happens in XY plane.

regards

November 23, 2018, 20:30	2D Stator-Rotor Interaction	#1
Muhammad Asim Sarwar New Member Join Date: Nov 2018 Posts: 8 Rep Power: 8	Hi, I am studying the profile losses of the rotor. I have created 2D stator and rotor and applied mixing plane between them. I am confused about axis of rotation while giving frame motion to 2D rotor. In real scenario, the blades are moving in z-axis. However, in my case I have only 2 axis. In which axis, should I apply axis of rotation. Secondly, I am also thinking about that can I give transnational velocity instead of rotational velocity. Since, it is a 2D domain, each rotor blades pass through the stator with some transnational velocity.

November 30, 2018, 14:05		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,752 Rep Power: 66	Use the translational velocity. In general you can give a rotating frame motion in 2D, but not for your problem. I.e. your stator-rotor sits in the wrong plane.

December 1, 2018, 01:12		#3
Hamidzoka Senior Member Hamid Zoka Join Date: Nov 2009 Posts: 293 Rep Power: 18	Hi Muhammad; In case of 2D simulations rotation does not make sense. In this cases normally rotation is replaced by translation. in other words rotating domain will be given a linear velocity the magnitude of which is r*omega. (r is radial distance of the 2D profile from turbine axis and omega is angular speed.) For instance consider a 2D domain with reference frame of XY. If the axial(streamwise) direction is x, the so called velocity will be set in direction of Y. So everything happens in XY plane. regards