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Z.Zhou, Z.Q. Tao,B.Y.Lin,et al. Numerical investigation on effects of high initial temperatures and pressures on flame behavior of ... International Journal of Hydrogen Energy 38(2013)274-281 [ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ] |
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ÈÙÓþ°æÖ÷ (ÖªÃû×÷¼Ò)
believe in yourself
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Numerical investigation on effects of high initial temperatures and pressures on flame behavior of CO/H-2/Air mixtures near the dilution limit ×÷Õß:Zhou, Z (Zhou, Z.)[ 1,2 ] ; Tao, ZQ (Tao, Z. Q.)[ 1,2 ] ; Lin, BY (Lin, B. Y.)[ 1 ] ; Kong, WJ (Kong, W. J.)[ 1 ] INTERNATIONAL JOURNAL OF HYDROGEN ENERGY ¾í: 38 ÆÚ: 1 Ò³: 274-281 DOI: 10.1016/j.ijhydene.2012.10.017 ³ö°æÄê: JAN 11 2013 ²é¿´ÆÚ¿¯ÐÅÏ¢ ÕªÒª This study investigates effects of initial temperatures and pressures on dilution limits of CO/H-2/air mixtures by numerical simulation of one-dimensional laminar premixed flames of CO/H-2/air mixtures (50%CO-50%H-2). Maximum flame temperatures, laminar flame speeds, mass burning rates and flame thickness near the dilution limits are analyzed. Results reveal that the dilution limits are extended at the elevated initial temperatures. The laminar flame speeds and mass burning rates at the dilution limits increase with the elevation of initial temperature, however, the flame thickness at the dilution limits decreases with increasing pressures and increases slightly with elevated initial temperature. The decreased flame thickness renders the flamelet modeling more favorable for turbulent combustion at elevated pressure conditions. The ratio of the flame thickness to the reaction thickness and the Zeldovich number increase first and then decrease with increasing pressure, but the non-monotonic trend of ratio of flame thickness to reaction thickness with the increasing pressures is unnoticeable. Sensitivity analysis suggested that the non-monotonic trend of the Zeldovich number could be caused by the combined effects of following elementary reactions: H + O-2 + M -> HO2 + M, 2HO(2) -> H2O2 + O-2 and H2O2 + M -> 2OH + M. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. ¹Ø¼ü´Ê ×÷Õ߹ؼü´Ê:Syngas; High temperature; High pressure; Dilution limit KeyWords Plus:COMBUSTION; PROPAGATION; EXTINCTION; HYDROGEN; FUEL ×÷ÕßÐÅÏ¢ ͨѶ×÷ÕßµØÖ·: Kong, WJ (ͨѶ×÷Õß) Chinese Acad Sci, Key Lab Light Duty Gas Turbine, Inst Engn Thermophys, 11 West Rd,4th Ring N, Beijing 100190, Peoples R China. µØÖ·: [ 1 ] Chinese Acad Sci, Key Lab Light Duty Gas Turbine, Inst Engn Thermophys, Beijing 100190, Peoples R China [ 2 ] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China µç×ÓÓʼþµØÖ·:wjkong@iet.cn »ù½ð×ÊÖúÖÂл »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ National Natural Science Foundation of China (NSFC) 50976115 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND Àà±ð / ·ÖÀà Ñо¿·½Ïò:Chemistry; Electrochemistry; Energy & Fuels Web of Science Àà±ð:Chemistry, Physical; Electrochemistry; Energy & Fuels ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000315001500031 ISSN: 0360-3199 ÆÚ¿¯ÐÅÏ¢ Ŀ¼£º Current Contents Connect® Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports® ÆäËûÐÅÏ¢ IDS ºÅ: 090SY Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 33 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0 |

2Â¥2014-06-09 16:53:49
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believe in yourself
- LS-EPI: 36
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3Â¥2014-06-09 16:54:07













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