{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/113258"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/113258","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Development of mesoscale burner arrays for next generation compact gas turbines","abstract":"In this study, a multi-node mesoscale burner array for compact gas turbines was developed. The burner array was designed to improve the overall combustion stability by exploiting flame-to-flame interactions under fuel-lean operation. Moreover, its design can be adjusted by scaling the element dimensions or array size to flexibly accommodate a wide range of combustion power outputs. The combustion characteristics of the mesoscale burner array were experimentally investigated using several optical diagnostic and analysis techniques. Lean blow off limit, flame temperature, and NO emission measurements were performed on the mesoscale burner array; the obtained measurements were compared with those of a baseline single-swirl burner. Furthermore, various flame structures from the mesoscale burner array were visualized using OH and CH2O planar laser-induced fluorescence (PLIF). Next, a diffusion type mesoscale burner array was developed and investigated for small-scale combustion applications. Each burner element in the diffusion mesoscale burner array was equipped with its own fuel injection holes built into its swirl-inducing geometry to improve flame interactions and reduce flame length. The performance of the diffusion mesoscale flame array is comparable to that of a premixed mesoscale flame array under similar operating conditions despite fuel unpremixedness. Furthermore, the combustion experiments were extended for a liquid fuel (Jet A) and the results successfully demonstrated the potential for the integration of heavy hydrocarbon liquid fuels. The mesoscale burner array was investigated using pre-vaporized Jet A fuel. The effects of inlet temperature on Jet A flames in the mesoscale burner array were studied. Then, the flame characteristics of the Jet A and methane flames in the mesoscale burner array were compared. The results provide solid foundation for designing and operating small-scale combustors that are operated with heavy hydrocarbon fuels. Moreover, hydrogen addition effects on the burner array were studied to improve the flame stability and combustion dynamics because hydrogen enhancement can be a promising solution for small-scale combustion systems. In summary, this study demonstrates the potential for a novel combustor architecture that can be scaled across a wide range of power outputs with minimal performance degradation for next generation propulsion and power systems.","abstract_html":"In this study, a multi-node mesoscale burner array for compact gas turbines was developed. The burner array was designed to improve the overall combustion stability by exploiting flame-to-flame interactions under fuel-lean operation. Moreover, its design can be adjusted by scaling the element dimensions or array size to flexibly accommodate a wide range of combustion power outputs. The combustion characteristics of the mesoscale burner array were experimentally investigated using several optical diagnostic and analysis techniques. Lean blow off limit, flame temperature, and NO emission measurements were performed on the mesoscale burner array; the obtained measurements were compared with those of a baseline single-swirl burner. Furthermore, various flame structures from the mesoscale burner array were visualized using OH and CH2O planar laser-induced fluorescence (PLIF). Next, a diffusion type mesoscale burner array was developed and investigated for small-scale combustion applications. Each burner element in the diffusion mesoscale burner array was equipped with its own fuel injection holes built into its swirl-inducing geometry to improve flame interactions and reduce flame length. The performance of the diffusion mesoscale flame array is comparable to that of a premixed mesoscale flame array under similar operating conditions despite fuel unpremixedness. Furthermore, the combustion experiments were extended for a liquid fuel (Jet A) and the results successfully demonstrated the potential for the integration of heavy hydrocarbon liquid fuels. The mesoscale burner array was investigated using pre-vaporized Jet A fuel. The effects of inlet temperature on Jet A flames in the mesoscale burner array were studied. Then, the flame characteristics of the Jet A and methane flames in the mesoscale burner array were compared. The results provide solid foundation for designing and operating small-scale combustors that are operated with heavy hydrocarbon fuels. Moreover, hydrogen addition effects on the burner array were studied to improve the flame stability and combustion dynamics because hydrogen enhancement can be a promising solution for small-scale combustion systems. In summary, this study demonstrates the potential for a novel combustor architecture that can be scaled across a wide range of power outputs with minimal performance degradation for next generation propulsion and power systems.","abstract_has_math":false,"creators":["Choi, Jeongan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Lee, Tonghun","Matalon, Moshe","Cai, Lili","Panerai, Francesco"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-01-12T22:51:40Z","date_published":"2022-01-12T22:51:40Z","updated_at":"2026-07-22T22:24:53Z","subjects":["Mesoscale","Burner","Compact combustor"],"languages":["en"],"rights":["Copyright 2021 Jeongan Choi"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/113258","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lee, Tonghun","Matalon, Moshe","Cai, Lili","Panerai, Francesco"]},{"key":"dc:creator","label":"Author","values":["Choi, Jeongan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-01-12T22:51:40Z","2024-01-12T22:56:20Z","2021-06-28","2021-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Mesoscale","Burner","Compact combustor"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2021 Jeongan Choi"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/113258"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In this study, a multi-node mesoscale burner array for compact gas turbines was developed. The burner array was designed to improve the overall combustion stability by exploiting flame-to-flame interactions under fuel-lean operation. Moreover, its design can be adjusted by scaling the element dimensions or array size to flexibly accommodate a wide range of combustion power outputs. The combustion characteristics of the mesoscale burner array were experimentally investigated using several optical diagnostic and analysis techniques. Lean blow off limit, flame temperature, and NO emission measurements were performed on the mesoscale burner array; the obtained measurements were compared with those of a baseline single-swirl burner. Furthermore, various flame structures from the mesoscale burner array were visualized using OH and CH2O planar laser-induced fluorescence (PLIF). Next, a diffusion type mesoscale burner array was developed and investigated for small-scale combustion applications. Each burner element in the diffusion mesoscale burner array was equipped with its own fuel injection holes built into its swirl-inducing geometry to improve flame interactions and reduce flame length. The performance of the diffusion mesoscale flame array is comparable to that of a premixed mesoscale flame array under similar operating conditions despite fuel unpremixedness. Furthermore, the combustion experiments were extended for a liquid fuel (Jet A) and the results successfully demonstrated the potential for the integration of heavy hydrocarbon liquid fuels. The mesoscale burner array was investigated using pre-vaporized Jet A fuel. The effects of inlet temperature on Jet A flames in the mesoscale burner array were studied. Then, the flame characteristics of the Jet A and methane flames in the mesoscale burner array were compared. The results provide solid foundation for designing and operating small-scale combustors that are operated with heavy hydrocarbon fuels. Moreover, hydrogen addition effects on the burner array were studied to improve the flame stability and combustion dynamics because hydrogen enhancement can be a promising solution for small-scale combustion systems. In summary, this study demonstrates the potential for a novel combustor architecture that can be scaled across a wide range of power outputs with minimal performance degradation for next generation propulsion and power systems.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-08-01","The student, Jeongan Choi, accepted the attached license on 2021-06-24 at 00:32.","The student, Jeongan Choi, submitted this Dissertation for approval on 2021-06-24 at 00:49.","This Dissertation was approved for publication on 2021-06-28 at 14:20.","DSpace SAF Submission Ingestion Package generated from Vireo submission #16713 on 2022-01-12 at 13:03:38","Made available in DSpace on 2022-01-12T22:51:40Z (GMT). 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The burner array was designed to improve the overall combustion stability by exploiting flame-to-flame interactions under fuel-lean operation. Moreover, its design can be adjusted by scaling the element dimensions or array size to flexibly accommodate a wide range of combustion power outputs. The combustion characteristics of the mesoscale burner array were experimentally investigated using several optical diagnostic and analysis techniques. Lean blow off limit, flame temperature, and NO emission measurements were performed on the mesoscale burner array; the obtained measurements were compared with those of a baseline single-swirl burner. Furthermore, various flame structures from the mesoscale burner array were visualized using OH and CH2O planar laser-induced fluorescence (PLIF). Next, a diffusion type mesoscale burner array was developed and investigated for small-scale combustion applications. Each burner element in the diffusion mesoscale burner array was equipped with its own fuel injection holes built into its swirl-inducing geometry to improve flame interactions and reduce flame length. The performance of the diffusion mesoscale flame array is comparable to that of a premixed mesoscale flame array under similar operating conditions despite fuel unpremixedness. Furthermore, the combustion experiments were extended for a liquid fuel (Jet A) and the results successfully demonstrated the potential for the integration of heavy hydrocarbon liquid fuels. The mesoscale burner array was investigated using pre-vaporized Jet A fuel. The effects of inlet temperature on Jet A flames in the mesoscale burner array were studied. Then, the flame characteristics of the Jet A and methane flames in the mesoscale burner array were compared. The results provide solid foundation for designing and operating small-scale combustors that are operated with heavy hydrocarbon fuels. Moreover, hydrogen addition effects on the burner array were studied to improve the flame stability and combustion dynamics because hydrogen enhancement can be a promising solution for small-scale combustion systems. In summary, this study demonstrates the potential for a novel combustor architecture that can be scaled across a wide range of power outputs with minimal performance degradation for next generation propulsion and power systems.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-08-01","The student, Jeongan Choi, accepted the attached license on 2021-06-24 at 00:32.","The student, Jeongan Choi, submitted this Dissertation for approval on 2021-06-24 at 00:49.","This Dissertation was approved for publication on 2021-06-28 at 14:20.","DSpace SAF Submission Ingestion Package generated from Vireo submission #16713 on 2022-01-12 at 13:03:38","Made available in DSpace on 2022-01-12T22:51:40Z (GMT). No. of bitstreams: 2 CHOI-DISSERTATION-2021.pdf: 6372880 bytes, checksum: e2d6b3c89aba7a8922a0aec2660b27eb (MD5) LICENSE.txt: 4209 bytes, checksum: 17c533692effa377beddac20ca1386c9 (MD5) Previous issue date: 2021-06-28","Embargo set by: Seth Robbins for item 121184 Lift date: 2024-01-12T22:51:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 121184 Lift date: 2024-01-12T22:53:32Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 121184 Lift date: 2024-01-12T22:54:14Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 121184 Lift date: 2024-01-12T22:55:09Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 121184 Lift date: 2024-01-12T22:56:20Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/113258"],"dc:language":["en"],"dc:rights":["Copyright 2021 Jeongan Choi"],"dc:subject":["Mesoscale","Burner","Compact combustor"],"dc:title":["Development of mesoscale burner arrays for next generation compact gas turbines"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:53Z"}