Week-7 : Converting a detailed engine model to a FRM model
aim: To explore the FRM model and build an FRM model of bore 102, stroke 115mm, compression ratio 17, no.of cylinders 6,twin-scroll turbo.
FRM Model: It is also called Fast Running Engine Model. It helps to reduce the Run time.
Building of FRM model: go to files -> Examples -> Engine_1D_gas_exchange_combustion-> Fast Running and mean value models -> FRM_Diesel_VGT_EGR.gtm.
FRM Converter: It is Used to convert normally build GT models to FRM Models.
All FRM options will be present in the tools of the GT suit. There is another option in FRM which is FRM tags It is used to keep the tags for every sub-system.
In the FRM model there are 7 steps :
1)step1: Exhaust manifold, is the first and most simplifying subsystem.
2) Step 2: Exhaust pipes, The exhaust pipe downstream of the turbine will be simplified and form a tagged subsystem.
3) step3: Intake manifold, Then intake manifold forms the tagged subsystem list.
4) step4: Compressor outlet pipes, Select Boost pipes 1 from the tagged subsystem list and click on simplify accuracy.
5) step5: Intake pipes, Select intake pipes1 from the Tagged SUbsystems list .and click on simplify accuracy.
6) Step6: Additional changes, like the Exhaust manifold it also has the same process as above but changes will be in the names.
7)step7: Cylinder Slaving, The final simplification of the model will utilize the cylinder slaving capability of engine components.
2) for completing the given model we have to: Go to the tools -> FRM Builder -> it askes for CI or SI Engine (select CI Engine)-> fill in the values of Bore, Stroke, and Compression ratio as given in question-> it asks for how many cylinders select 6 cylinders -> Then it asks for the controller (select GT Controller)->select finish.
Then you will be having your model Then save it as the file -> Then go to case setup and on all cases -> Then click on run -> Then you will be having your results in a very short time compared to the normal model.
Result: The results of the given model output time and run-time are very less compared to the normal model.
conclusion: If we need a model with an easy option and in a very short time with minimal data, we can go with FRM Builders .