Tutorials Manual

Chemkin 4.1.1
Chapter 2: Combustion in Gas-phase Processes
Figure 2-44
PaSR Methane/Air—Temperature Variance Comparison
Figure 2-45
PaSR Methane/Air—CO Comparison
Since we requested the temperature pdf to be saved to a data file, we can view the
pdf profile by importing it into the Post-Processor. To import the pdf profile generated
by the PaSR, we use the Import command in the File menu of the CHEMKIN Post-
Processor. After we select the data file, pdf_T_0.1.plt, we should instruct the Post-
Processor to skip the first two lines of the text and to read the third line as column
titles as shown in Figure 2-46. We also need to set the column delimiter to “space”.
We can repeat the same procedures for the second file containing the temperature
pdf of the weak mixing case. Once we have both pdf's imported to the Post-
Processor, we can plot these two profiles together for easy comparisons. As shown in
Figure 2-47, the pdf of strong mixing case peaks around 2000 K with a small “tail”
over temperatures slightly lower than the peak value. We can conclude that a stable
combustion zone is established in the strong mixing combustor. The weak mixing
case, however, has two peaks in its temperature pdf profile. A smaller peak is located
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