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pressure doesn't rise in combustion

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Old   December 31, 2011, 14:07
Default pressure doesn't rise in combustion
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Boudour
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hi every body, i need to simulate tne combustion in diesel engines i managed to found to fire the temperature gets 1700k but the pressure still constant no changes i used finite rate / eddy dissipation model
does any one know why
any help will be appreciated
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Old   June 5, 2017, 08:47
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ali
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Quote:
Originally Posted by roukaia View Post
hi every body, i need to simulate tne combustion in diesel engines i managed to found to fire the temperature gets 1700k but the pressure still constant no changes i used finite rate / eddy dissipation model
does any one know why
any help will be appreciated
hi roukaia.
your post is for a long time ago and now i have a problem exactly like you.
if you solved your problem, please help me.
i am simulating an spark ignition engine in fluent and i'm using finite rate/eddy dissipation like you. tempreture rise up to 1600k but pressure isnt good.
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Old   June 5, 2017, 09:43
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Ash Kotwal
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ANSYS fluent shows less pressure compared to experimental pressure, in terms of Pressure drop. This is really stupid, I don't know if it's bug or you need to use the UDF with parabolic profile of flow.


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