Simulation of Si engine(Premixed Combustion) at Part load condition

Pramod B · March 5, 2018, 12:33

Hi,
I am trying to simulate SI engine at part load condition. I am using full-cyle geometry and all the boundary conditions as derived from experiments. The following pictures show the comparison between simulation and experimental data for two cycles of simulation. For these simulations, the embedding size around spark location is 5mm and 7mm with embedding scales of 5 and 4.

Another simulation is performed with embedding size of 1mm and 3mm as in the example cases around the spark location with same embedding scales and the simulation gives different results this time. The comparison with experimental is shown in 1st figure.

There is is a significant variation in HRR too for different cases and the trend does not match with experimental(Picture here shows the trend). The HRR curves for different cases are shown here.

Can anyone give me some advice on how to solve this problem and help me understand things better.

Thanks in advance

SamWijey · March 5, 2018, 16:49

Hi Pramod,

Can you email your case setup files at support@convergecfd.com using your official email? We will help you figure out these differences and what needs to be done to obtain accurate predictions.

Thanks,

Pramod B · March 5, 2018, 23:37

I have sent the case setup files to support@convergecfd.com. Please look into them and help me solve the problems.

Thanks.

SamWijey · March 6, 2018, 10:32

Pramod,

We have received your case and one of our support engineers will get in touch with you on this.

Thanks,

March 5, 2018, 16:49		#2
SamWijey Senior Member Sameera Wijeyakulasuriya Join Date: Jan 2016 Location: Convergent Science, Madison WI Posts: 117 Rep Power: 10	Hi Pramod, Can you email your case setup files at support@convergecfd.com using your official email? We will help you figure out these differences and what needs to be done to obtain accurate predictions. Thanks, __________________ Sameera Wijeyakulasuriya Principal Engineer, Applications CONVERGECFD

March 6, 2018, 10:32		#4
SamWijey Senior Member Sameera Wijeyakulasuriya Join Date: Jan 2016 Location: Convergent Science, Madison WI Posts: 117 Rep Power: 10	Pramod, We have received your case and one of our support engineers will get in touch with you on this. Thanks, __________________ Sameera Wijeyakulasuriya Principal Engineer, Applications CONVERGECFD

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March 5, 2018, 23:37		#3
Pramod B New Member Pramod Borado Join Date: Sep 2017 Posts: 6 Rep Power: 8	I have sent the case setup files to support@convergecfd.com. Please look into them and help me solve the problems. Thanks.