Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays
An attempt has been made to identify conditions for dropwise ignition and spray ignition. Both pure as well as multicomponent fuels are considered. For dropwise ignition, an existing ignition criterion has been modified to account for the nonlinear dependence of reaction rate on fuel and oxygen conc...
Gespeichert in:
| Veröffentlicht in: | Combustion and flame 1990-07, Vol.81 (1), p.59-72 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 72 |
|---|---|
| container_issue | 1 |
| container_start_page | 59 |
| container_title | Combustion and flame |
| container_volume | 81 |
| creator | Mawid, M. Aggarwal, S.K. |
| description | An attempt has been made to identify conditions for dropwise ignition and spray ignition. Both pure as well as multicomponent fuels are considered. For dropwise ignition, an existing ignition criterion has been modified to account for the nonlinear dependence of reaction rate on fuel and oxygen concentrations and to account for the multicomponent nature of the fuel. The external or spray ignition is considered through the zero heat flux condition at the ignition source. The effect of chemical kinetics is examined by employing reaction schemes with unity as well as nonunity exponents of fuel and oxygen concentrations. Results indicate that for most of the conditions considered, the individual droplet ignition is favored over the external ignition. Only when the drop diameter is smaller than 30 μm does the spray ignite earlier than droplets. The addition of a small amount of a volatile component significantly enhances the ignitability of both modes. However, the effect is stronger for the dropwise ignition mode. |
| doi_str_mv | 10.1016/0010-2180(90)90070-8 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_6545080</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>0010218090900708</els_id><sourcerecordid>25769484</sourcerecordid><originalsourceid>FETCH-LOGICAL-c424t-4d3bb3c75b7c75cceccdeaf311f38fd0a4c8f5cd613df5f38ded120b696678bb3</originalsourceid><addsrcrecordid>eNp90d2LFSEUAHCJgm5b_0EPEvT1MKUz6jgvC8vSFyz0Um-BePVYxlydPM7W_e9zukv7tiAK-jtHzjmEPOXsDWdcvWWMs67nmr2a2OuJsZF1-h7ZcSlV1089v092_8lD8gjxJ2tIDMOOfLtIdj5iRJoD9SUvvyMCjd9TrDEneg0FV6Twp0Jp8PYh5EJ9nNcK9LDONbp8WHKCVGlYYaa4FHvEx-RBsDPCk5vzjHx9_-7L5cfu6vOHT5cXV50Tvaid8MN-P7hR7se2OQfOebBh4DwMOnhmhdNBOq_44INsdx4879leTUqNuoWekWenvBlrNOhiBffD5ZTAVaOkkEyzhl6e0FLyrxWwmkNEB_NsE-QVzSjkKPSkRZMv7pS9HNUk_kFxgq5kxALBLCUebDkazsw2GbO13WxtN9O22mSMbmHPb_JbdHYOxSYX8TZ26pXQXDV3fnLQencdoWylQXLgY9kq8zne_dFfyfakDA</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>25769484</pqid></control><display><type>article</type><title>Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays</title><source>Elsevier ScienceDirect Journals</source><creator>Mawid, M. ; Aggarwal, S.K.</creator><creatorcontrib>Mawid, M. ; Aggarwal, S.K.</creatorcontrib><description>An attempt has been made to identify conditions for dropwise ignition and spray ignition. Both pure as well as multicomponent fuels are considered. For dropwise ignition, an existing ignition criterion has been modified to account for the nonlinear dependence of reaction rate on fuel and oxygen concentrations and to account for the multicomponent nature of the fuel. The external or spray ignition is considered through the zero heat flux condition at the ignition source. The effect of chemical kinetics is examined by employing reaction schemes with unity as well as nonunity exponents of fuel and oxygen concentrations. Results indicate that for most of the conditions considered, the individual droplet ignition is favored over the external ignition. Only when the drop diameter is smaller than 30 μm does the spray ignite earlier than droplets. The addition of a small amount of a volatile component significantly enhances the ignitability of both modes. However, the effect is stronger for the dropwise ignition mode.</description><identifier>ISSN: 0010-2180</identifier><identifier>EISSN: 1556-2921</identifier><identifier>DOI: 10.1016/0010-2180(90)90070-8</identifier><identifier>CODEN: CBFMAO</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>400800 - Combustion, Pyrolysis, & High-Temperature Chemistry ; 420400 - Engineering- Heat Transfer & Fluid Flow ; Applied sciences ; CHEMICAL REACTION KINETICS ; COMBUSTION KINETICS ; Combustion of liquid fuels ; Combustion. Flame ; DEPOSITION ; DISPERSIONS ; DROPLETS ; drops ; ELEMENTS ; Energy ; Energy. Thermal use of fuels ; ENGINEERING ; Exact sciences and technology ; FLAME SPRAYING ; FLAMES ; FUELS ; HEAT FLUX ; ignition ; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ; KINETICS ; MIXTURES ; NONLINEAR PROBLEMS ; NONMETALS ; OXYGEN ; PARTICLES ; REACTION KINETICS ; SPRAY COATING ; sprays ; SURFACE COATING ; Theoretical studies. Data and constants. Metering</subject><ispartof>Combustion and flame, 1990-07, Vol.81 (1), p.59-72</ispartof><rights>1990</rights><rights>1991 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c424t-4d3bb3c75b7c75cceccdeaf311f38fd0a4c8f5cd613df5f38ded120b696678bb3</citedby><cites>FETCH-LOGICAL-c424t-4d3bb3c75b7c75cceccdeaf311f38fd0a4c8f5cd613df5f38ded120b696678bb3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/0010-2180(90)90070-8$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,777,781,882,3537,27905,27906,45976</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=19264816$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6545080$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Mawid, M.</creatorcontrib><creatorcontrib>Aggarwal, S.K.</creatorcontrib><title>Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays</title><title>Combustion and flame</title><description>An attempt has been made to identify conditions for dropwise ignition and spray ignition. Both pure as well as multicomponent fuels are considered. For dropwise ignition, an existing ignition criterion has been modified to account for the nonlinear dependence of reaction rate on fuel and oxygen concentrations and to account for the multicomponent nature of the fuel. The external or spray ignition is considered through the zero heat flux condition at the ignition source. The effect of chemical kinetics is examined by employing reaction schemes with unity as well as nonunity exponents of fuel and oxygen concentrations. Results indicate that for most of the conditions considered, the individual droplet ignition is favored over the external ignition. Only when the drop diameter is smaller than 30 μm does the spray ignite earlier than droplets. The addition of a small amount of a volatile component significantly enhances the ignitability of both modes. However, the effect is stronger for the dropwise ignition mode.</description><subject>400800 - Combustion, Pyrolysis, & High-Temperature Chemistry</subject><subject>420400 - Engineering- Heat Transfer & Fluid Flow</subject><subject>Applied sciences</subject><subject>CHEMICAL REACTION KINETICS</subject><subject>COMBUSTION KINETICS</subject><subject>Combustion of liquid fuels</subject><subject>Combustion. Flame</subject><subject>DEPOSITION</subject><subject>DISPERSIONS</subject><subject>DROPLETS</subject><subject>drops</subject><subject>ELEMENTS</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>ENGINEERING</subject><subject>Exact sciences and technology</subject><subject>FLAME SPRAYING</subject><subject>FLAMES</subject><subject>FUELS</subject><subject>HEAT FLUX</subject><subject>ignition</subject><subject>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</subject><subject>KINETICS</subject><subject>MIXTURES</subject><subject>NONLINEAR PROBLEMS</subject><subject>NONMETALS</subject><subject>OXYGEN</subject><subject>PARTICLES</subject><subject>REACTION KINETICS</subject><subject>SPRAY COATING</subject><subject>sprays</subject><subject>SURFACE COATING</subject><subject>Theoretical studies. Data and constants. Metering</subject><issn>0010-2180</issn><issn>1556-2921</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><recordid>eNp90d2LFSEUAHCJgm5b_0EPEvT1MKUz6jgvC8vSFyz0Um-BePVYxlydPM7W_e9zukv7tiAK-jtHzjmEPOXsDWdcvWWMs67nmr2a2OuJsZF1-h7ZcSlV1089v092_8lD8gjxJ2tIDMOOfLtIdj5iRJoD9SUvvyMCjd9TrDEneg0FV6Twp0Jp8PYh5EJ9nNcK9LDONbp8WHKCVGlYYaa4FHvEx-RBsDPCk5vzjHx9_-7L5cfu6vOHT5cXV50Tvaid8MN-P7hR7se2OQfOebBh4DwMOnhmhdNBOq_44INsdx4879leTUqNuoWekWenvBlrNOhiBffD5ZTAVaOkkEyzhl6e0FLyrxWwmkNEB_NsE-QVzSjkKPSkRZMv7pS9HNUk_kFxgq5kxALBLCUebDkazsw2GbO13WxtN9O22mSMbmHPb_JbdHYOxSYX8TZ26pXQXDV3fnLQencdoWylQXLgY9kq8zne_dFfyfakDA</recordid><startdate>19900701</startdate><enddate>19900701</enddate><creator>Mawid, M.</creator><creator>Aggarwal, S.K.</creator><general>Elsevier Inc</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7TC</scope><scope>OTOTI</scope></search><sort><creationdate>19900701</creationdate><title>Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays</title><author>Mawid, M. ; Aggarwal, S.K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c424t-4d3bb3c75b7c75cceccdeaf311f38fd0a4c8f5cd613df5f38ded120b696678bb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>400800 - Combustion, Pyrolysis, & High-Temperature Chemistry</topic><topic>420400 - Engineering- Heat Transfer & Fluid Flow</topic><topic>Applied sciences</topic><topic>CHEMICAL REACTION KINETICS</topic><topic>COMBUSTION KINETICS</topic><topic>Combustion of liquid fuels</topic><topic>Combustion. Flame</topic><topic>DEPOSITION</topic><topic>DISPERSIONS</topic><topic>DROPLETS</topic><topic>drops</topic><topic>ELEMENTS</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>ENGINEERING</topic><topic>Exact sciences and technology</topic><topic>FLAME SPRAYING</topic><topic>FLAMES</topic><topic>FUELS</topic><topic>HEAT FLUX</topic><topic>ignition</topic><topic>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</topic><topic>KINETICS</topic><topic>MIXTURES</topic><topic>NONLINEAR PROBLEMS</topic><topic>NONMETALS</topic><topic>OXYGEN</topic><topic>PARTICLES</topic><topic>REACTION KINETICS</topic><topic>SPRAY COATING</topic><topic>sprays</topic><topic>SURFACE COATING</topic><topic>Theoretical studies. Data and constants. Metering</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mawid, M.</creatorcontrib><creatorcontrib>Aggarwal, S.K.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Mechanical Engineering Abstracts</collection><collection>OSTI.GOV</collection><jtitle>Combustion and flame</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mawid, M.</au><au>Aggarwal, S.K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays</atitle><jtitle>Combustion and flame</jtitle><date>1990-07-01</date><risdate>1990</risdate><volume>81</volume><issue>1</issue><spage>59</spage><epage>72</epage><pages>59-72</pages><issn>0010-2180</issn><eissn>1556-2921</eissn><coden>CBFMAO</coden><abstract>An attempt has been made to identify conditions for dropwise ignition and spray ignition. Both pure as well as multicomponent fuels are considered. For dropwise ignition, an existing ignition criterion has been modified to account for the nonlinear dependence of reaction rate on fuel and oxygen concentrations and to account for the multicomponent nature of the fuel. The external or spray ignition is considered through the zero heat flux condition at the ignition source. The effect of chemical kinetics is examined by employing reaction schemes with unity as well as nonunity exponents of fuel and oxygen concentrations. Results indicate that for most of the conditions considered, the individual droplet ignition is favored over the external ignition. Only when the drop diameter is smaller than 30 μm does the spray ignite earlier than droplets. The addition of a small amount of a volatile component significantly enhances the ignitability of both modes. However, the effect is stronger for the dropwise ignition mode.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><doi>10.1016/0010-2180(90)90070-8</doi><tpages>14</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0010-2180 |
| ispartof | Combustion and flame, 1990-07, Vol.81 (1), p.59-72 |
| issn | 0010-2180 1556-2921 |
| language | eng |
| recordid | cdi_osti_scitechconnect_6545080 |
| source | Elsevier ScienceDirect Journals |
| subjects | 400800 - Combustion, Pyrolysis, & High-Temperature Chemistry 420400 - Engineering- Heat Transfer & Fluid Flow Applied sciences CHEMICAL REACTION KINETICS COMBUSTION KINETICS Combustion of liquid fuels Combustion. Flame DEPOSITION DISPERSIONS DROPLETS drops ELEMENTS Energy Energy. Thermal use of fuels ENGINEERING Exact sciences and technology FLAME SPRAYING FLAMES FUELS HEAT FLUX ignition INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY KINETICS MIXTURES NONLINEAR PROBLEMS NONMETALS OXYGEN PARTICLES REACTION KINETICS SPRAY COATING sprays SURFACE COATING Theoretical studies. Data and constants. Metering |
| title | Analysis of dropwise ignition versus external ignition for dilute multicomponent fuel sprays |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-17T20%3A55%3A49IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Analysis%20of%20dropwise%20ignition%20versus%20external%20ignition%20for%20dilute%20multicomponent%20fuel%20sprays&rft.jtitle=Combustion%20and%20flame&rft.au=Mawid,%20M.&rft.date=1990-07-01&rft.volume=81&rft.issue=1&rft.spage=59&rft.epage=72&rft.pages=59-72&rft.issn=0010-2180&rft.eissn=1556-2921&rft.coden=CBFMAO&rft_id=info:doi/10.1016/0010-2180(90)90070-8&rft_dat=%3Cproquest_osti_%3E25769484%3C/proquest_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=25769484&rft_id=info:pmid/&rft_els_id=0010218090900708&rfr_iscdi=true |