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Chemkin 4.1.1 Chapter 2: Combustion in Gas-phase Processes Figure 2-35 has two reactor network clusters. The first cluster represents the region around the flame in the combustor and the second cluster uses a single PFR for the post-flame region between the flame and turbine inlet. We set the first PSR as the mixing zone because the fuel stream is partially premixed. A flame zone PSR is directly connected to the mixing zone and is followed by a recirculation zone for back mixing of hot combusted gas. The solutions of the through flow from the flame zone (the last reactor of cluster number 1) are automatically fed to the post-flame zone (the second cluster) as indicated by the gray line. Figure 2-34 shows the reactor configuration that will be modelled. Figure 2-34 Gas Turbine Network—Schematic The project file, reactor_network__gas_turbine.ckprj, can be found in the samples41 directory. The reaction mechanism for methane-air combustion is the GRI Mech 3.0, as described in section Section 2.8.2. Figure 2-35 Gas Turbine Network—Diagram View © 2007 Reaction Design 58 RD0411-C20-000-001
Chapter 2: Combustion in Gas-phase Processes <strong>Tutorials</strong> <strong>Manual</strong> 2.6.1.3 Project Results The solutions from the reactor network are shown in Figure 2-36 and Figure 2-37. The temperature solutions in Figure 2-36 indicate that the gas mixture ignites in the third reactor (flame zone) and the temperature continues to increase in the second reactor (recirculation zone) where part of the recycled CO is consumed. Gas temperature increases slightly in the post-flame region (the second cluster) as remaining CO is converted to CO 2 in the hot flue gas (see Figure 2-37). The NO profiles are also given in Figure 2-37. As we expected, NO level continues to rise in the post-flame region mainly due to the thermal NO formation. Figure 2-36 Gas Turbine Network—Temperature Comparisons Figure 2-37 Gas Turbine Network—CO and NO Comparisons RD0411-C20-000-001 59 © 2007 Reaction Design
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August 3, 2007 1:53 am Release 4.1.
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Chemkin 4.1.1 Contents Table of Con
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Chemkin 4.1.1 Tables List of Tables
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Page 13 and 14: Chemkin 4.1.1 1 1 Introduction The
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Page 17 and 18: Chemkin 4.1.1 2 2 Combustion in Gas
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Chapter 3: Catalytic Processes Tuto
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Chemkin 4.1.1 4 4 Materials Problem
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Chapter 4: Materials Problems Tutor
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Chemkin 4.1.1 5 5 Chemical Mechanis
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Tutorials Manual 4.1.1 Index Index
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Index Tutorials Manual normalized s
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Tutorials Manual

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