CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

BoCos for axial fan modelling

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   February 5, 2013, 07:13
Default BoCos for axial fan modelling
Join Date: May 2010
Posts: 57
Rep Power: 9
Catthan is on a distinguished road
Dear all,

recently I have undertaken a project where I need to model an automotive axial cooling fan.

The papers I've read use a 2D airfoil model as a first stage approach and then a 3D model. My understanding is that they use a moving reference for both 2D and 3D models.

At the moment I have set up the 2D where I have the blade profile and I have specified a translational fluid zone with the blade walls having a relative velocity equal to 0.

Inlet is vel. inlet and outlet is press. outlet with targeting mass-flow.

I am essentially trying to recreate the fan curve with some approximation at least and then move on to 3D, do fan curve and then acoustics..

I am not entirely convinced however that I can use a 2D airfoil model for any of this..

Is flow over 2D airfoil studied over a stationary airfoil?
Is there any point of trying to predict any fan performance out of this or is it just for looking at flow over an airfloil, lift, drag, separation etc?

Furthermore I have convergence trouble with continuity (can't get it under 10^-3). I am using Spal. - Almrs model

Can you please point me into the right direction as to how should I set up my model and whether a 2D airfoil model is applicable at all?

Is there any sort of turbomachinery guide about what do we use different types of model for? (other than the CFD-wiki)

My CFD experience has only been on Stirling Engines and I am now struggling with this set up..

I'd appreciate any help.

Catthan is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
[GAMBIT] Modelling CPU radial heat sink fan r.sirait ANSYS Meshing & Geometry 3 June 4, 2012 01:57
Inlet shapes for modelling a fan in an inlet duct buzzybee CFX 10 June 11, 2009 20:15
Negative Pressure in fan modelling Jenny CFX 3 September 30, 2007 08:47
Fan Modelling Problem in CFX Jenny CFX 8 September 11, 2007 13:59
Modelling Ceiling Fan suitto FLUENT 1 March 21, 2000 12:46

All times are GMT -4. The time now is 00:01.