Assignment 11

OBJECTIVE:

Set discretization length of 0.1mm and compare it with the case of discretization length of 40mm

Compare Parameters like Torque, BSFC, Maximum Cylinder Pressure, Simulation Time

Explore the tutorial "Building Intake Manifold from STL model" i.e. conversion of 3D Model into 1D GT Model.

Case-1: 1cylDI final model

setting the discretization length as parameter

case setup:

Results:

conclusion:

From the above results we can infer that discretization from 40mm to 0.1mm has not given any drastic change in results i.e same results have been obained irrespective of discretization length.

Case-II: Converting 3D model to 1D using GEM3D

• Here, inlet manifold model is chosen for modelling and it is imported to the GEM3D software.

• After importing, the model has to be discretized. Hence use the option separate by curves to divide the model.

• Now the inlet and outlet parts are removed for the flow to take place.

• Further discretization is done by using 3 point cutting plane option.

• Now each of the pipe should be converted to component by right clicking the respective pipe and selecting convert to component.

• This process is applied to all the pipes and the complete conversion model is as below

• The inlet part is alsi descritized.

• Now orifice connections are given to the pipes so that there is a uniform flow in the pipes.

• Inorder to specify the boundaries in the model,connections of the sub assemblies should be done by mentioning the port numbers.

• Now this descritized model is exported.

• After descritization the model is as below in GT-ISE

conclusion:

Hence the intake manifold model has been built from a STL file.