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March 16, 2015, 22:34 |
No steep rise in pressure curve
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#1 |
New Member
Balaji
Join Date: Mar 2015
Posts: 2
Rep Power: 0 |
I am currently simulating HCCI Mode of Combustion with n - heptane as the fuel. My problem is that I am unable to get a steep rise in the pressure curve although I have a considerable amount of heat release (perceived from the spd file) I have given the following parameters as the input
1. combustion model - ECFM-3Z 2. Cetane no - 60 3. Eq ratio - 0.29 4. EGR - 0% 5. Initial Pressure - 6.14 bar 6. Initial Temp - 503K 7. Injected Mass - 4.716e-4 kg/s (pls tell me whether this mass is sufficient for combustion or not) Should I need to change any of the ignition parameters? |
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March 19, 2015, 02:42 |
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#2 | |
New Member
Can
Join Date: Jan 2013
Location: Istanbul
Posts: 26
Rep Power: 13 |
Hi,
Firstly, what is your injector hole diameter? You should write its diameter values as meter (m) in Pro-Star. And I guess eq ratio should be bigger, for example 0.85. I usually use Lambda value for air/fuel mixture.(Lambda = 1.5-1.8 for diesel engines). I am not sure about the mass of injected fuel. Maybe you should check it by using 1D simulation. Quote:
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March 19, 2015, 03:05 |
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#3 |
New Member
Balaji
Join Date: Mar 2015
Posts: 2
Rep Power: 0 |
Hi,
Thanks for the reply. My injector hole diameter is 0.188mm. I have found out that my injection mass was not sufficient for combustion. Can you please help me in deciding the ignition model ? |
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March 19, 2015, 03:44 |
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#4 |
New Member
Can
Join Date: Jan 2013
Location: Istanbul
Posts: 26
Rep Power: 13 |
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