GDI Combustion modeling using ECFM-3Z

cfdvenkatesh · August 26, 2015, 11:34

I need some clarification on using StarCD ECFM-3Z combustion model for simulating GDI engines.

1. How good are results from ECFM-3Z model available in StarCD compared to experiments with default parameters?

2. What are all combustion model parameters tuned to match test data?

3. What is valid range for these parameters? Are these tuned parameters work well for all other similar engines or they need to be adjusted for each engine and each operating point?

4. How good are default fuel available in StarCD compared to fuel used in Dyno?

Thanks in advance ...

srivathsanps · January 7, 2016, 04:40

1. As far I know, we need not tune the parameters ! But be careful with the octane/cetane no ..
2.Check your initial conditions which is the prime most parameter
3. They don't need to be tuned for each operating point .. when you can initially validate with the experimental data .. u can leave the parameter as it is !
4.The given fuel libraries are reliable .. sorry ! I dint know abt Dyno..

Thanks

August 26, 2015, 11:34	GDI Combustion modeling using ECFM-3Z	#1
cfdvenkatesh New Member Venkatesh V Join Date: Sep 2009 Posts: 24 Rep Power: 16	I need some clarification on using StarCD ECFM-3Z combustion model for simulating GDI engines. 1. How good are results from ECFM-3Z model available in StarCD compared to experiments with default parameters? 2. What are all combustion model parameters tuned to match test data? 3. What is valid range for these parameters? Are these tuned parameters work well for all other similar engines or they need to be adjusted for each engine and each operating point? 4. How good are default fuel available in StarCD compared to fuel used in Dyno? Thanks in advance ... abhayminachi likes this.

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January 7, 2016, 04:40		#2
srivathsanps New Member srivatsan Join Date: Jan 2015 Posts: 3 Rep Power: 11	1. As far I know, we need not tune the parameters ! But be careful with the octane/cetane no .. 2.Check your initial conditions which is the prime most parameter 3. They don't need to be tuned for each operating point .. when you can initially validate with the experimental data .. u can leave the parameter as it is ! 4.The given fuel libraries are reliable .. sorry ! I dint know abt Dyno.. Thanks