
[Sponsors] 
April 27, 2008, 21:10 
How can I calculate equivalence ratio?

#1 
Guest
Posts: n/a

Sponsored Links
Can anybody tell me? Thanks for any help you can give me. 

Sponsored Links 
April 29, 2008, 04:09 
Re: How can I calculate equivalence ratio?

#2 
Guest
Posts: n/a

Equivalance ratio is the ratio of Airfuel mixture (stoic) to the Airfuel mixture (actual). Hope this helps  Mac.


April 29, 2008, 17:50 
Re: How can I calculate equivalence ratio?

#3 
Guest
Posts: n/a

As Mac said the equiv. ratio is airtofuel stoich / airtofuel actual...depending on the combustion model that you use you have different way to get the correct mass concentration to calculate the airtofuel ratio.


May 6, 2008, 02:51 
Re: How can I calculate equivalence ratio?

#4 
Guest
Posts: n/a

The model what I use are:
1 Turbulent flow model: standard Кε 2 Droplet BreakUp Model: Reitz/Diwakar 3 Spray impingement model: Bai's 4 Ignition model: shell I want to know only steam or liquid and steam reckon in fuel? And when I calculate air, air is equal to subtract fuel from cell mass or O2+N2+CO2+H2O or O2/0.233 or some way else? 

May 15, 2008, 18:23 
Re: How can I calculate equivalence ratio?

#5 
Guest
Posts: n/a

Use only the mass of fuel vapor and the mass of air...calculated by means of m_02/0.233


May 21, 2008, 02:44 
Re: How can I calculate equivalence ratio?

#6 
Guest
Posts: n/a

Hi i too need to calclulate Equivalence ratio..The pecentage of exhaust gases and composition are given..The Stoichiometric A/F ratio is known but i dunno actual A/F ratio..Can i find out the equivalence ratio from chemical equations..could anyone help me


May 21, 2008, 02:44 
Re: How can I calculate equivalence ratio?

#7 
Guest
Posts: n/a

Hi.. i too need to calclulate Equivalence ratio..The pecentage of exhaust gases and composition are given..The Stoichiometric A/F ratio is known but i dunno actual A/F ratio..Can i find out the equivalence ratio from chemical equations..could anyone help me


June 7, 2008, 12:40 
Re: How can I calculate equivalence ratio?

#8 
Guest
Posts: n/a

You must calculate the actual A/F ratio from the output of your simulation...?!
Use command getc to load the mass of fuel vapour in each cell and to load the mass of oxygen in the same cells. Then you can calculate the locale A/F ratio and the local equiv. ratio. Bye 

Thread Tools  
Display Modes  


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Who can help me about equivalence ratio?  Duan J Q  Siemens  5  May 15, 2008 18:17 
diesel spray combustion equivalence ratio  usker  Siemens  12  March 1, 2008 07:09 
How can I calculate the airfuel ratio?  lizhihua  Siemens  1  August 22, 2006 00:45 
equivalence ratio  Antony  Siemens  1  November 18, 2005 11:59 
Distribution of Phi (Equivalence ratio)  Mahbub  Siemens  3  January 5, 2004 01:47 
Sponsored Links 