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Prediction Performance of Chemical Mechanisms for Numerical Simulation of Methane Jet MILD Combustion
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Title: | Prediction Performance of Chemical Mechanisms for Numerical Simulation of Methane Jet MILD Combustion |
Authors: | Kim, Yu Jeong Browse this author | Oh, Chang Bo Browse this author | Fujita, Osamu Browse this author →KAKEN DB |
Issue Date: | 2013 |
Publisher: | Hindawi publishing corporation |
Journal Title: | Advances in mechanical engineering |
Volume: | 2013 |
Start Page: | 138729 |
Publisher DOI: | 10.1155/2013/138729 |
Abstract: | The prediction performance of five chemical mechanisms (3-STEP, WD4, SKELETAL, DRM-19, and GRI-2.11) was investigated to confirm their suitability for use in numerical simulations of methane combustion in moderate or intense low-oxygen dilution (MILD). A wall-confined jet geometry was introduced to simulate MILD combustion. The oxygen level in the coflowing air was adjusted by mixing the air with combustion products. Each chemical mechanism was analyzed with respect to the flame structure and main product, including CO and NO; the emission indices for CO were also discussed. The temperature distributions and heat-release rates predicted by the chemical mechanisms were similar when the flames were stably attached to the fuel jet exit. The temperature distributions and heat-release rates were dependent on the flame liftoff characteristics, as were the CO and NO emissions. The NO concentration predicted by GRI-2.11 was lower than those predicted using other chemical mechanisms, although DRM-19 predicted a relatively similar value. The emission indices for NO (EINO) and CO (EICO) predicted by each chemical mechanism decreased with increasing dilution rate. The predicted EICO had a negative value even at a small dilution rate, which implies that some of the CO supplied to the air stream is consumed during MILD combustion. |
Rights: | https://creativecommons.org/licenses/by/4.0/ |
Type: | article |
URI: | http://hdl.handle.net/2115/54631 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤田 修
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