{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/19458"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/19458","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A methodology for characterizing the thermal behavior of internal combustion engine components and systems","abstract":"A systematic methodology for characterizing the thermal behavior of internal combustion engine components and systems is presented. The approach integrates a thermodynamic-based engine simulation, a finite element model of combustion chamber components in sliding motion, and a resistor-capacitor thermal model of the engine system. This thesis describes the development of this methodology, its validation against analytical and experimental results, and its application to illustrative problems related to thermal management in diesel and spark-ignition engines.","abstract_html":"A systematic methodology for characterizing the thermal behavior of internal combustion engine components and systems is presented. The approach integrates a thermodynamic-based engine simulation, a finite element model of combustion chamber components in sliding motion, and a resistor-capacitor thermal model of the engine system. This thesis describes the development of this methodology, its validation against analytical and experimental results, and its application to illustrative problems related to thermal management in diesel and spark-ignition engines.","abstract_has_math":false,"creators":["Baker, Douglas Martin"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T12:08:10Z","date_published":"2011-05-07T12:08:10Z","updated_at":"2026-07-22T22:25:14Z","subjects":["Engineering, Automotive","Engineering, Mechanical"],"languages":["eng"],"rights":["Copyright 1995 Baker, Douglas Martin"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9543520","(UMI)AAI9543520"],"render_values":[{"text":"AAI9543520","href":null,"code":true},{"text":"(UMI)AAI9543520","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/19458","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Baker, Douglas Martin"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T12:08:10Z","10000-01-01","1995"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"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":["Engineering, Automotive","Engineering, Mechanical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1995 Baker, Douglas Martin"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9543520","(UMI)AAI9543520","http://hdl.handle.net/2142/19458"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A systematic methodology for characterizing the thermal behavior of internal combustion engine components and systems is presented. The approach integrates a thermodynamic-based engine simulation, a finite element model of combustion chamber components in sliding motion, and a resistor-capacitor thermal model of the engine system. This thesis describes the development of this methodology, its validation against analytical and experimental results, and its application to illustrative problems related to thermal management in diesel and spark-ignition engines.","First, thermodynamic simulations are modified to account for multi-dimensional in-cylinder heat rejection from combustion gases to chamber components and cooling fluids. The spark-ignition model incorporates two-zone combustion and turbulence models with a predicted flame-front sweeping across a multi-zone cylinder wall. Thus, in-cylinder surfaces are exposed to both unburned and burned gases. Cycle-resolved boundary conditions are subsequently generated for use with multi-dimensional, finite element models of combustion chamber components.","Next, finite element models of the piston/ring/wall assembly solve implicitly the unsteady, multi-dimensional heat conduction equation. A reduced capacitance technique expedites quasi-steady convergence of cyclic penetration regimes connected by Laplacian sub-surface regions. Multi-mesh interpolation resolves solutions within the quasi-steady penetration depth. Boundary condition models include cycle-resolved gas temperatures and convective coefficients, local nucleate boiling of the coolant, a reciprocating piston, and local piston ring/skirt friction. Coupled use of engine simulations and detailed component models provides a means for extracting heat flow 'resistances' between key nodes in resistor-capacitor networks.","Finally, a global resistor-capacitor network tracks all modes of thermal energy transport within the engine components, cooling, and exhaust systems under either steady-state or transient conditions. The resulting set of linearized algebraic expressions is solved implicitly using a dual-banded asymmetric equation solver. The methodology has been used to analyze a light-duty, I-4 engine instrumented to measure heat rejection rates and component temperatures for comparison with numerical predictions. It has been shown that both the global resistor-capacitor model, as well as the detailed thermodynamic simulation and finite element models predict results in good agreement with measurements and among themselves over the range of speeds and loads considered. Overall, the methodology provides useful insight into a range of issues related to thermal management in internal combustion engine systems.","Made available in DSpace on 2011-05-07T12:08:10Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9543520.pdf: 7801014 bytes, checksum: 3b24c3be146de111dc70805fb0d2b4e1 (MD5) Previous issue date: 1995","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:37:06Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:15:11-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["A methodology for characterizing the thermal behavior of internal combustion engine components and systems"]}]}],"canonical_facts":{"dc:creator":["Baker, Douglas Martin"],"dc:date":["2011-05-07T12:08:10Z","10000-01-01","1995"],"dc:description":["A systematic methodology for characterizing the thermal behavior of internal combustion engine components and systems is presented. The approach integrates a thermodynamic-based engine simulation, a finite element model of combustion chamber components in sliding motion, and a resistor-capacitor thermal model of the engine system. This thesis describes the development of this methodology, its validation against analytical and experimental results, and its application to illustrative problems related to thermal management in diesel and spark-ignition engines.","First, thermodynamic simulations are modified to account for multi-dimensional in-cylinder heat rejection from combustion gases to chamber components and cooling fluids. The spark-ignition model incorporates two-zone combustion and turbulence models with a predicted flame-front sweeping across a multi-zone cylinder wall. Thus, in-cylinder surfaces are exposed to both unburned and burned gases. Cycle-resolved boundary conditions are subsequently generated for use with multi-dimensional, finite element models of combustion chamber components.","Next, finite element models of the piston/ring/wall assembly solve implicitly the unsteady, multi-dimensional heat conduction equation. A reduced capacitance technique expedites quasi-steady convergence of cyclic penetration regimes connected by Laplacian sub-surface regions. Multi-mesh interpolation resolves solutions within the quasi-steady penetration depth. Boundary condition models include cycle-resolved gas temperatures and convective coefficients, local nucleate boiling of the coolant, a reciprocating piston, and local piston ring/skirt friction. Coupled use of engine simulations and detailed component models provides a means for extracting heat flow 'resistances' between key nodes in resistor-capacitor networks.","Finally, a global resistor-capacitor network tracks all modes of thermal energy transport within the engine components, cooling, and exhaust systems under either steady-state or transient conditions. The resulting set of linearized algebraic expressions is solved implicitly using a dual-banded asymmetric equation solver. The methodology has been used to analyze a light-duty, I-4 engine instrumented to measure heat rejection rates and component temperatures for comparison with numerical predictions. It has been shown that both the global resistor-capacitor model, as well as the detailed thermodynamic simulation and finite element models predict results in good agreement with measurements and among themselves over the range of speeds and loads considered. Overall, the methodology provides useful insight into a range of issues related to thermal management in internal combustion engine systems.","Made available in DSpace on 2011-05-07T12:08:10Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9543520.pdf: 7801014 bytes, checksum: 3b24c3be146de111dc70805fb0d2b4e1 (MD5) Previous issue date: 1995","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:37:06Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:15:11-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9543520","(UMI)AAI9543520","http://hdl.handle.net/2142/19458"],"dc:language":["eng"],"dc:rights":["Copyright 1995 Baker, Douglas Martin"],"dc:subject":["Engineering, Automotive","Engineering, Mechanical"],"dc:title":["A methodology for characterizing the thermal behavior of internal combustion engine components and systems"],"dc:type":["text"],"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":"2026-07-22T22:25:14Z"}