|August 10, 2012, 13:00||
Combustion in Spark Ignition Cylinder
Join Date: Apr 2011
Posts: 27Rep Power: 6
I am modelling Spark Ignition engine work (compress, combustion, work). I set:
Pressure based, Transient Solver
Energy Equation- On
Species- Partially Premixed Combustion with PDF Table (CH4 (methane)- 1 in mass fraction and N2- 0.767 and O2- 0.233 in mass fraction), with compressibility effects and calculated PDF Table.
Spark Ignition- Fixed Spark Size with Start at 360 degrees.
Materials- remove Air, remains PDF Mixture and Solid Aluminium.
I am modelling Dynamic Mesh working as piston.
Solution Methods- Green Gauss Cell Based, Pressure PRESTO!, rest First Order Upwind.
Solution Initialized with Mean Mixture Fraction 0.03.
I have such calcuations:
At crank angle 199 degrees:
At crank angle 369 degrees:
My problem is that, combustion is at about crank angle 120 degrees, when it should be at crank angle 360 degrees by spark ignition (I have 720 time steps). What to do to have spark ignition at crank angle 360?
Last edited by tom634; August 10, 2012 at 13:25.
|December 30, 2014, 12:45||
Join Date: Aug 2009
Posts: 10Rep Power: 8
please if you have solved your proplem please helpe me.
could you please tell me how you choose the mean mixture fraction 0.03.
i am doing a simulation of biogas in si engine using FLUENT.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Spark Ignition||Jonny6001||FLUENT||3||April 23, 2014 04:43|
|how does the ignition model initiate main combustion||mepgzzi||CD-adapco||0||June 23, 2012 14:32|
|Error with spark ignition model||geothokar||CFX||5||April 25, 2009 02:06|
|Spark Ignition at two point ?||ngoctm||CFX||0||February 13, 2009 03:59|
|Premixed combustion in Spark Ignition engine||kevin||FLUENT||1||June 23, 2006 02:59|