Combustion Chemistry of Rich Methanol–Air Mixtures
Chain branching and heat release processes and their influence on the burning velocity of premixed rich and near-stoichiometric methanol–air flames were studied by numerical simulation and sensitivity analysis. The phenomenon of superadiabatic temperatures in these flames due to the kinetic mechanis...
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description | Chain branching and heat release processes and their influence on the burning velocity of premixed rich and near-stoichiometric methanol–air flames were studied by numerical simulation and sensitivity analysis. The phenomenon of superadiabatic temperatures in these flames due to the kinetic mechanism of methanol combustion was first detected. Comparison of the simulation results of the structure of methanol and formaldehyde flames shows that the formation of water in superequilibrium concentrations in flames does not necessarily lead to superadiabatic temperatures, as believed earlier. It was first found that decreasing the dilution of the CH
3
OH/O
2
/N
2
combustible mixture with nitrogen at a constant equivalence ratio enhances the superadiabatic temperature effect. According to simulation results, in a rich near-limit methanol flame, the role of the chain branching reactions H + O
2
= O + OH and O + H
2
= H + OH is negligible due to their low rate. At relatively low temperatures, branching occurs mainly in reactions involving HO
2
and H
2
O
2
peroxide compounds, whose concentration is orders of magnitude higher than the concentration of the main chain carriers H, O, and OH. From the sensitivity analysis, it follows that the burning velocity of methanol flames is positively influenced mainly by the reactions of formation of chain carriers and is negatively influenced by the reactions of consumption of chain carriers. reactions having a major contribution to heat release but are not involved in the formation and consumption of radicals have small sensitivity coefficients. |
doi_str_mv | 10.1134/S0010508220010013 |
format | Article |
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3
OH/O
2
/N
2
combustible mixture with nitrogen at a constant equivalence ratio enhances the superadiabatic temperature effect. According to simulation results, in a rich near-limit methanol flame, the role of the chain branching reactions H + O
2
= O + OH and O + H
2
= H + OH is negligible due to their low rate. At relatively low temperatures, branching occurs mainly in reactions involving HO
2
and H
2
O
2
peroxide compounds, whose concentration is orders of magnitude higher than the concentration of the main chain carriers H, O, and OH. From the sensitivity analysis, it follows that the burning velocity of methanol flames is positively influenced mainly by the reactions of formation of chain carriers and is negatively influenced by the reactions of consumption of chain carriers. reactions having a major contribution to heat release but are not involved in the formation and consumption of radicals have small sensitivity coefficients.</description><identifier>ISSN: 0010-5082</identifier><identifier>EISSN: 1573-8345</identifier><identifier>DOI: 10.1134/S0010508220010013</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Chain branching ; Classical and Continuum Physics ; Classical Mechanics ; Combustion chemistry ; Computer simulation ; Consumption ; Control ; Dilution ; Dynamical Systems ; Energy & Fuels ; Engineering ; Engineering, Chemical ; Engineering, Multidisciplinary ; Equivalence ratio ; Low temperature ; Materials Science ; Materials Science, Multidisciplinary ; Methanol ; Physical Chemistry ; Physical Sciences ; Physics ; Physics and Astronomy ; Science & Technology ; Sensitivity analysis ; Simulation ; Technology ; Temperature effects ; Thermodynamics ; Vibration</subject><ispartof>Combustion, explosion, and shock waves, 2020, Vol.56 (1), p.1-10</ispartof><rights>Pleiades Publishing, Ltd. 2020</rights><rights>Pleiades Publishing, Ltd. 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>4</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000552069200001</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c353t-c9d6ee77aa010d017d7735e713805f0f6c4fea4374375a64469501fdfbfde0ce3</citedby><cites>FETCH-LOGICAL-c353t-c9d6ee77aa010d017d7735e713805f0f6c4fea4374375a64469501fdfbfde0ce3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S0010508220010013$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S0010508220010013$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,781,785,27929,27930,28253,41493,42562,51324</link.rule.ids></links><search><creatorcontrib>Shvartsberg, V. M.</creatorcontrib><creatorcontrib>Bunev, V. A.</creatorcontrib><title>Combustion Chemistry of Rich Methanol–Air Mixtures</title><title>Combustion, explosion, and shock waves</title><addtitle>Combust Explos Shock Waves</addtitle><addtitle>COMBUST EXPLO SHOCK</addtitle><description>Chain branching and heat release processes and their influence on the burning velocity of premixed rich and near-stoichiometric methanol–air flames were studied by numerical simulation and sensitivity analysis. The phenomenon of superadiabatic temperatures in these flames due to the kinetic mechanism of methanol combustion was first detected. Comparison of the simulation results of the structure of methanol and formaldehyde flames shows that the formation of water in superequilibrium concentrations in flames does not necessarily lead to superadiabatic temperatures, as believed earlier. It was first found that decreasing the dilution of the CH
3
OH/O
2
/N
2
combustible mixture with nitrogen at a constant equivalence ratio enhances the superadiabatic temperature effect. According to simulation results, in a rich near-limit methanol flame, the role of the chain branching reactions H + O
2
= O + OH and O + H
2
= H + OH is negligible due to their low rate. At relatively low temperatures, branching occurs mainly in reactions involving HO
2
and H
2
O
2
peroxide compounds, whose concentration is orders of magnitude higher than the concentration of the main chain carriers H, O, and OH. From the sensitivity analysis, it follows that the burning velocity of methanol flames is positively influenced mainly by the reactions of formation of chain carriers and is negatively influenced by the reactions of consumption of chain carriers. reactions having a major contribution to heat release but are not involved in the formation and consumption of radicals have small sensitivity coefficients.</description><subject>Chain branching</subject><subject>Classical and Continuum Physics</subject><subject>Classical Mechanics</subject><subject>Combustion chemistry</subject><subject>Computer simulation</subject><subject>Consumption</subject><subject>Control</subject><subject>Dilution</subject><subject>Dynamical Systems</subject><subject>Energy & Fuels</subject><subject>Engineering</subject><subject>Engineering, Chemical</subject><subject>Engineering, Multidisciplinary</subject><subject>Equivalence ratio</subject><subject>Low temperature</subject><subject>Materials Science</subject><subject>Materials Science, Multidisciplinary</subject><subject>Methanol</subject><subject>Physical Chemistry</subject><subject>Physical Sciences</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Science & Technology</subject><subject>Sensitivity analysis</subject><subject>Simulation</subject><subject>Technology</subject><subject>Temperature effects</subject><subject>Thermodynamics</subject><subject>Vibration</subject><issn>0010-5082</issn><issn>1573-8345</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>AOWDO</sourceid><recordid>eNqNkMtKAzEUhoMoWKsP4G7ApYzmOpkuy-ANWgQv6yHNnNiUdlKTDNqd7-Ab-iRmqOhCBCGQkHxfzjk_QscEnxHC-Pk9xgQLXFLaHzBhO2hAhGR5ybjYRYP-Nu_f99FBCAuMMaW8GCBeudWsC9G6NqvmsLIh-k3mTHZn9TybQpyr1i0_3t7H1mdT-xo7D-EQ7Rm1DHD0tQ_R4-XFQ3WdT26vbqrxJNdMsJjrUVMASKlUKt5gIhspmQBJWImFwabQ3IDiTKYlVMF5MRKYmMbMTANYAxuik-2_a--eOwixXrjOt6lkTTktSkKk4IkiW0p7F4IHU6-9XSm_qQmu-3DqX-Ek53TrvMDMmaAttBq-vZSOEBQXo8T3-BCV_6crG1UfZ-W6NiaVbtWQ8PYJ_M8If3f3Ce3whbk</recordid><startdate>2020</startdate><enddate>2020</enddate><creator>Shvartsberg, V. M.</creator><creator>Bunev, V. A.</creator><general>Pleiades Publishing</general><general>Springer Nature</general><general>Springer Nature B.V</general><scope>AOWDO</scope><scope>BLEPL</scope><scope>DTL</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>2020</creationdate><title>Combustion Chemistry of Rich Methanol–Air Mixtures</title><author>Shvartsberg, V. M. ; Bunev, V. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c353t-c9d6ee77aa010d017d7735e713805f0f6c4fea4374375a64469501fdfbfde0ce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Chain branching</topic><topic>Classical and Continuum Physics</topic><topic>Classical Mechanics</topic><topic>Combustion chemistry</topic><topic>Computer simulation</topic><topic>Consumption</topic><topic>Control</topic><topic>Dilution</topic><topic>Dynamical Systems</topic><topic>Energy & Fuels</topic><topic>Engineering</topic><topic>Engineering, Chemical</topic><topic>Engineering, Multidisciplinary</topic><topic>Equivalence ratio</topic><topic>Low temperature</topic><topic>Materials Science</topic><topic>Materials Science, Multidisciplinary</topic><topic>Methanol</topic><topic>Physical Chemistry</topic><topic>Physical Sciences</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Science & Technology</topic><topic>Sensitivity analysis</topic><topic>Simulation</topic><topic>Technology</topic><topic>Temperature effects</topic><topic>Thermodynamics</topic><topic>Vibration</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shvartsberg, V. M.</creatorcontrib><creatorcontrib>Bunev, V. A.</creatorcontrib><collection>Web of Science - Science Citation Index Expanded - 2020</collection><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>CrossRef</collection><jtitle>Combustion, explosion, and shock waves</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shvartsberg, V. M.</au><au>Bunev, V. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Combustion Chemistry of Rich Methanol–Air Mixtures</atitle><jtitle>Combustion, explosion, and shock waves</jtitle><stitle>Combust Explos Shock Waves</stitle><stitle>COMBUST EXPLO SHOCK</stitle><date>2020</date><risdate>2020</risdate><volume>56</volume><issue>1</issue><spage>1</spage><epage>10</epage><pages>1-10</pages><issn>0010-5082</issn><eissn>1573-8345</eissn><abstract>Chain branching and heat release processes and their influence on the burning velocity of premixed rich and near-stoichiometric methanol–air flames were studied by numerical simulation and sensitivity analysis. The phenomenon of superadiabatic temperatures in these flames due to the kinetic mechanism of methanol combustion was first detected. Comparison of the simulation results of the structure of methanol and formaldehyde flames shows that the formation of water in superequilibrium concentrations in flames does not necessarily lead to superadiabatic temperatures, as believed earlier. It was first found that decreasing the dilution of the CH
3
OH/O
2
/N
2
combustible mixture with nitrogen at a constant equivalence ratio enhances the superadiabatic temperature effect. According to simulation results, in a rich near-limit methanol flame, the role of the chain branching reactions H + O
2
= O + OH and O + H
2
= H + OH is negligible due to their low rate. At relatively low temperatures, branching occurs mainly in reactions involving HO
2
and H
2
O
2
peroxide compounds, whose concentration is orders of magnitude higher than the concentration of the main chain carriers H, O, and OH. From the sensitivity analysis, it follows that the burning velocity of methanol flames is positively influenced mainly by the reactions of formation of chain carriers and is negatively influenced by the reactions of consumption of chain carriers. reactions having a major contribution to heat release but are not involved in the formation and consumption of radicals have small sensitivity coefficients.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S0010508220010013</doi><tpages>10</tpages></addata></record> |
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subjects | Chain branching Classical and Continuum Physics Classical Mechanics Combustion chemistry Computer simulation Consumption Control Dilution Dynamical Systems Energy & Fuels Engineering Engineering, Chemical Engineering, Multidisciplinary Equivalence ratio Low temperature Materials Science Materials Science, Multidisciplinary Methanol Physical Chemistry Physical Sciences Physics Physics and Astronomy Science & Technology Sensitivity analysis Simulation Technology Temperature effects Thermodynamics Vibration |
title | Combustion Chemistry of Rich Methanol–Air Mixtures |
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