CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

head of an axial turbine in two-phased analysis

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 8, 2020, 04:40
Default head of an axial turbine in two-phased analysis
  #1
New Member
 
amirbhr
Join Date: Jul 2019
Posts: 4
Rep Power: 6
amirbhr is on a distinguished road
Hello all!
I am simulating an axial water turbine within an open channel. The simulation has been done using a free surface method for two phases water and air. In cfd-post, I have a problem with the efficiency computation while calculating the net hydraulic head. I cannot find any way to calculate the efficiency directly and I have to find the head to evaluate the efficiency. Would anyone help me in this regard?
amirbhr is offline   Reply With Quote

Old   June 16, 2020, 12:18
Default need for help
  #2
New Member
 
amirbhr
Join Date: Jul 2019
Posts: 4
Rep Power: 6
amirbhr is on a distinguished road
any help would be greatly appreciated
amirbhr is offline   Reply With Quote

Old   June 16, 2020, 12:51
Default
  #3
Senior Member
 
Join Date: Jun 2009
Posts: 1,803
Rep Power: 32
Opaque will become famous soon enough
Are you using the existing macro in CFD-Post for efficiency? If yes, do those macros work for multiphase simulations?

What is the formula you expect should be used for those calculations? perhaps with such information, someone in the forum can help realize it via expressions.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.
Opaque is offline   Reply With Quote

Old   June 24, 2020, 10:50
Default
  #4
New Member
 
amirbhr
Join Date: Jul 2019
Posts: 4
Rep Power: 6
amirbhr is on a distinguished road
Thanks, Opaque!
Yes, I used Macro icon, but I encountered the error "no total pressure in stn. frame".
Besides, I tried to use the formula T(torque on shaft) * omega / (rho * g * Q(mass flow rate) * H (net head over the axial turbine) ). In this stage, the calculation of the hydraulic head (H) is my question.
amirbhr is offline   Reply With Quote

Reply

Tags
efficiency, free surface, hydraulic head, water turbine

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
regarding fluent setup for wind turbine analysis er_ijaz FLUENT 0 May 1, 2013 04:55
Cyclic Symmetry - transient- axial turbine case. Gowrav Main CFD Forum 1 April 13, 2013 08:15
Turbine Analysis - Alternate Rotation Model and Meshing Problems sean89dunn CFX 2 March 23, 2013 22:27
Analysis of Wind turbine blade ( 3D aerofoil) by Ansys 12 rsskarthikeyan FLUENT 5 October 13, 2012 22:29
CFX Analysis of a wind turbine Bournegenius CFX 16 August 20, 2012 19:16


All times are GMT -4. The time now is 11:17.