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

Advice for Fluent's modelling of an engine intake system

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 26, 2014, 09:03
Default Advice for Fluent's modelling of an engine intake system
  #1
New Member
 
Juhti
Join Date: Feb 2014
Location: Spain
Posts: 4
Rep Power: 9
TimberJ3 is on a distinguished road
Hi,

I'm a student who is working in the modelling of the air at the intake duct of an engine for my final project and Iím asking for some advice.



Until now, Iíve been training myself working on the tutorial guide and some simple configurations with theoretical background such as laminar/turbulent pipes just to get familiarized with fluent (v.6.3.26).
After that I have been trying some simplified geometries that we have at the lab in order to validate the results with experimental data. The proprieties we are interested in are the variation of pressure between the inlet and the outlet as a function of the mass flow.


We are obtaining good enough results (deviation about 3-5%) for DeltaP between 10 to 200 mbar (velocity between 20 and 100 m/s) but deviations between 10-20% at higher and lower limits. the turbulence models used are k-e (simple and RNG models) and RS model with first & second order upwind equations.
Operating Pressure is turned to 0 and air is the material with density defined as ideal gas and viscosity with Sutherlandís coefficients in order to improve the results. Also mesh refinements based on velocity gradients have been tried and 3 different meshes.


Since results are not good enough for all the range of mass flow and I am running out of ideas, I would appreciate a lot some advice for next attempts.


Thank you in advance.
TimberJ3 is offline   Reply With Quote

Reply

Tags
advice, intake modelling

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
Advice on multi-phase flow modelling Martin Main CFD Forum 3 October 14, 2008 05:16
CFX model of diesel engine intake & compression Gareth Floweday CFX 5 May 2, 2002 03:54
Stirling engine simulation advice needed Geoffrey Main CFD Forum 2 December 18, 2001 02:26
advice needed in solving linear system yf yap Main CFD Forum 5 February 5, 2001 00:21
modelling airflow through an inlet restrictor on a four stroke engine mike ede Main CFD Forum 0 October 8, 1999 09:06


All times are GMT -4. The time now is 09:10.