Week 11: Project 2 - Emission characterization on a CAT3410 engine
Hello,
In this project, as per the given problem statements, first we find the respective parameters to set our case setup accordingly and plan the simulation. To do the same, first go for importing the geometry in the CONVERGE-STUDIO. After this, go for the normal checks, which must be pointed in the direction of the flow. Then, a diagnosis is done to check for any kind of geometrical error. During this several problems are coming in front of the model that must be need to correct. that can be done by using patch, delt, normal etc. commands. But the main problem is that the geometry is very complex so its better to flag boundaries first to do diagnosis more efficiently. The simulation that follows can be converging by using the Cygwin interface, which is required for giving the command to the software. In Cygwin, first we go to the directory where the input files are present and then command them for simulation. This simulation can be done automatically at the back end, and the output files are generated in the same folder as the results of the simulation.
Then those output files have to be exported in Paraview to see the results in the different interfaces and also in their plots in the Converge Studio. For importing the output files in Paraview, first we need to convert the data into a ".vtm file," which is done in the "Post-Processing 3-D" option in Converge-Studio. Then all the 3D and 2-D analyses of the results are analysed separately. The rest of the plots can be seen in Converge-studio itself, specifically under the "line-plotting option."
By doing so, I was able to obtain all of the required results for this particular challenge and take screenshots of them. The CFD analysis of this problem is done three times for three different mesh sizes, and the results are attached in a word file. Kindly find it below in the word file.
Open W Piston Performence
Power(P) = 2*pi*N*T/60
Power = Work/Time.
Work = 481.931 N-m
Time = Duration(deg)/Degrees Per Second =240.199/18000=0.0133 Seconds.
Power = 481.931/0.0133 = 36235.413 KJ or 36.235 KW
N (RPM) = 3000
P= 2*pi*N*T/60
T =36.235*60/2*pi*3000
T= 34819.14*60/2*pi*3000
T= 11534.09 N-m
Omega Piston Performence
P= 2*pi*N*T/60
Power = Work/Time.
Work =548.303 N-m
Time = Duration(deg)/Degrees Per Second =240.199/18000=0.0133 Seconds.
Power = 548.303/0.0133 = 41225.789 KJ or 41.225 KW
N (RPM) = 3000
P= 2*pi*N*T/60
T= 41225.789*60/2*pi*3000
T= 13122.576 N-m