|
[Sponsors] |
October 19, 2010, 05:29 |
Flame length overpredicted
|
#1 |
New Member
fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 16 |
Dear all,
I try to simulate methanol spray combustion in a swirl-stabilized burner using dieselFoam. I used cylindricalInletVelocity BC for inlet gas flow, and unitInjector for methanol spray. I got very long flame--could not see the flame tip even after increasing the combustor length by factor of 5. All the boundary conditions are based on a benchmark experiment. I've tried to increase reaction rate in chem.inp file by 10 order of magnitude but no difference seen in term of flame length. Has anyone encounter this problem before? Any 'guess' is welcomed. Thanks, Fairus |
|
October 21, 2010, 06:43 |
|
#2 |
Member
Franco Marra
Join Date: Mar 2009
Location: Napoli - Italy
Posts: 69
Rep Power: 17 |
Dear Fairus,
it is very difficult to suggest something meaningful with so few information about your simulation. I can just try to guess some possibilities in the spirit that I will certainly miss the right answer but I could promote your thoughts about the different issues involved. Firstly it is important to check the geometry: just missing the right units (m instead of mm f.i.) could give you completely different conditions. To have a so long flame means that you are putting much more fuel than air: how do you check your stoichiometry ? I would suggest to test the simulation by reducing the the mass flow rate of fuel. My best regards, Franco |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Turbulence length scale and integral length scale | rizhang | CFX | 2 | April 22, 2016 07:22 |
Enquiry about the flame simulation in rotary kiln | hassanelattar | FLUENT | 0 | March 25, 2009 07:41 |
Length Scales in Flame | leaf | Main CFD Forum | 1 | September 1, 2008 04:20 |
About the laminar jet diffusion flame length | Sheng Chen | Main CFD Forum | 1 | July 10, 2004 01:07 |