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Chemkin 4.1.1 Chapter 2: Combustion in Gas-phase Processes 2.6.4.2 Project Setup The project file is called pfr__side_inlet_parameter_study.ckprj. All data files are found in the samples41\pfr\side_inlet_parameter_study directory. The simulated model is based on a Lawrence Berkeley National Laboratory experimental setup 22 . Their report includes a description of a concentric tube, with the ammonia stream in the center, and the oxidizing stream around the edges, as illustrated in Figure 2-48. Figure 2-48 Illustration of the System to be Modeled. The two streams have the following composition: Table 2-9 Components in Fuel and Oxidizer Streams Component Stream a (fuel) Stream b (oxidizer) N 2 0.974 0.88 CH 4 2.E-3 0 NH 3 6.E-4 0 O 2 0 0.08 H 2 O 0 0.04 21. Marinov, N. M., Pitz, W. J., Westbrook, C. K., Hori, M., and Matsunaga, N. “An Experimental and Kinetic Calculation of the Promotion Effect of Hydrocarbons on the NO- NO 2 Conversion in a Flow Reactor”, Proceedings of the Combustion Institute, Volume 27, pp. 389-396, 1998. (UCRL-JC-129372). 22. Grcar, J. F., Glarborg, P., Bell, J.B., Day, M. S., Loren, A., Jensen, A. D. “Effects of Mixing on Ammonia Oxidation in Combustion Environments at Intermediate Temperatures”, Lawrence Berkeley National Laboratory report LBNL-54187. © 2007 Reaction Design 70 RD0411-C20-000-001
Chapter 2: Combustion in Gas-phase Processes <strong>Tutorials</strong> <strong>Manual</strong> A length of 3 cm in the mixing region is an estimate based on CFD calculations22 (see p. 70) . The temperature of the gas was varied between the range of 1000 to 1500 K in a parameter study. The diameter profile and the flow rate profile vary in the 3-cm mixing region. The fuel and oxidizer streams have a 1:1 flow ratio, with their sum being a value of 2 l/min, which is 16.667 cm 3 /s for each stream. The oxidizer stream volumetric flow rate is brought up from zero to 16.6667 over the 3-cm mixing region. 2.6.4.3 Project Results Figure 2-49 shows the increase in mass attributed to the effect of the side inlet flow. Figure 2-49 Total Flow Growing Directly as a Result of Side Inlet Flow. At the exit, the predicted NO concentration has a peak near 1250 K, similar to experimental results 22 . RD0411-C20-000-001 71 © 2007 Reaction Design
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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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Tutorials Manual 4.1.1 Figures List
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List of Figures Tutorials Manual 2-
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Chemkin 4.1.1 1 1 Introduction The
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Chemkin 4.1.1 2 2 Combustion in Gas
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Tutorials Manual 4.1.1 Index Index
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Tutorials Manual

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