{"id":{"repo_id":"qu-belfast","oai_identifier":"oai:pure.qub.ac.uk/portal:studenttheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1"},"canonical_url":"https://search.dev.ndltd.org/etd/qu-belfast/oai:pure.qub.ac.uk/portal:studenttheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1","repository":{"repo_id":"qu-belfast","name":"Queen's University Belfast","base_url":"https://pureadmin.qub.ac.uk/ws/oai"},"display":{"title":"Development of Optimisation Methodologies for the Internal Combustion Engine Airbox","abstract":"The geometrical design of the airbox for an internal combustion engine has a
significant effect on the pressure loss in the entire inlet tract. Due to the
location of the airbox, its size and shape is usually limited as a result of the
proximity to other under-bonnet features. The shape is also limited by
manufacturing, assembly and NVH considerations. The complexity of the
unsteady flow through the airbox and the constraints placed upon it by the
available volume in the under-bonnet area make this a challenging design
task.
This work attempts to lay the foundations for a robust optimization strategy for
the design of an airbox by coupling a 3D-steady flow Computational Fluid
Dynamics (CFD) model to an automatic optimization process. The objective is
to formulate a strategy that can be built upon in future to encompass unsteady
flow and multi-cylinder engines.
The work reviews the current thinking on methods used to optimize CFD
problems and how this would apply to the optimization of an airbox for an
internal combustion engine. The investigation then continues to detail the
findings of the initial validation work on the CFD method for predicting the
pressure loss through an airbox. Two simple airboxes are tested on a steady
flow rig and the results compared to the CFD predictions.
An optimization case study is then presented based on one of the models
used for the initial validation. The study compares three different optimization
techniques and then validates the results by testing the optimum design found
by each method. A second case study is then undertaken to further validate
the results using more flexible optimization software.","abstract_html":"The geometrical design of the airbox for an internal combustion engine has a<br/>significant effect on the pressure loss in the entire inlet tract. Due to the<br/>location of the airbox, its size and shape is usually limited as a result of the<br/>proximity to other under-bonnet features. The shape is also limited by<br/>manufacturing, assembly and NVH considerations. The complexity of the<br/>unsteady flow through the airbox and the constraints placed upon it by the<br/>available volume in the under-bonnet area make this a challenging design<br/>task.<br/><br/>This work attempts to lay the foundations for a robust optimization strategy for<br/>the design of an airbox by coupling a 3D-steady flow Computational Fluid<br/>Dynamics (CFD) model to an automatic optimization process. The objective is<br/>to formulate a strategy that can be built upon in future to encompass unsteady<br/>flow and multi-cylinder engines.<br/><br/>The work reviews the current thinking on methods used to optimize CFD<br/>problems and how this would apply to the optimization of an airbox for an<br/>internal combustion engine. The investigation then continues to detail the<br/>findings of the initial validation work on the CFD method for predicting the<br/>pressure loss through an airbox. Two simple airboxes are tested on a steady<br/>flow rig and the results compared to the CFD predictions.<br/><br/>An optimization case study is then presented based on one of the models<br/>used for the initial validation. The study compares three different optimization<br/>techniques and then validates the results by testing the optimum design found<br/>by each method. A second case study is then undertaken to further validate<br/>the results using more flexible optimization software.","abstract_has_math":false,"creators":["Branney, Ciaran"],"institution":"Queen's University Belfast","degree_name":"Doctor of Philosophy","degree_level":"Doctoral Thesis","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Cunningham, Geoffrey"],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009","date_published":"2009","updated_at":"2026-07-24T03:55:12Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oai:pure.qub.ac.uk/portal:studenttheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1"],"render_values":[{"text":"oai:pure.qub.ac.uk/portal:studenttheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1","href":null,"code":true}]}]},"links":{"outbound_url":"https://pure.qub.ac.uk/en/studentTheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Cunningham, Geoffrey"]},{"key":"dc:creator","label":"Author","values":["Branney, Ciaran"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2009"]},{"key":"dc:date.issued","label":"Date","values":["2009"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["School of Mechanical and Aerospace Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["Queen's University Belfast"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://pure.qub.ac.uk/en/studentTheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral Thesis"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["Doctor of Philosophy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["oai:pure.qub.ac.uk/portal:studenttheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1","https://pure.qub.ac.uk/en/studentTheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://pure.qub.ac.uk/files/191805462/final_Development_of_Optimisation_Methodologies_for_the_Internal_Combustion_Engine_Airbox.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The geometrical design of the airbox for an internal combustion engine has a
significant effect on the pressure loss in the entire inlet tract. Due to the
location of the airbox, its size and shape is usually limited as a result of the
proximity to other under-bonnet features. The shape is also limited by
manufacturing, assembly and NVH considerations. The complexity of the
unsteady flow through the airbox and the constraints placed upon it by the
available volume in the under-bonnet area make this a challenging design
task.
This work attempts to lay the foundations for a robust optimization strategy for
the design of an airbox by coupling a 3D-steady flow Computational Fluid
Dynamics (CFD) model to an automatic optimization process. The objective is
to formulate a strategy that can be built upon in future to encompass unsteady
flow and multi-cylinder engines.
The work reviews the current thinking on methods used to optimize CFD
problems and how this would apply to the optimization of an airbox for an
internal combustion engine. The investigation then continues to detail the
findings of the initial validation work on the CFD method for predicting the
pressure loss through an airbox. Two simple airboxes are tested on a steady
flow rig and the results compared to the CFD predictions.
An optimization case study is then presented based on one of the models
used for the initial validation. The study compares three different optimization
techniques and then validates the results by testing the optimum design found
by each method. A second case study is then undertaken to further validate
the results using more flexible optimization software."]},{"key":"dc:title","label":"Title","values":["Development of Optimisation Methodologies for the Internal Combustion Engine Airbox"]}]}],"canonical_facts":{"dc:contributor.advisor":["Cunningham, Geoffrey"],"dc:creator":["Branney, Ciaran"],"dc:date":["2009"],"dc:date.issued":["2009"],"dc:description.abstract":["The geometrical design of the airbox for an internal combustion engine has a
significant effect on the pressure loss in the entire inlet tract. Due to the
location of the airbox, its size and shape is usually limited as a result of the
proximity to other under-bonnet features. The shape is also limited by
manufacturing, assembly and NVH considerations. The complexity of the
unsteady flow through the airbox and the constraints placed upon it by the
available volume in the under-bonnet area make this a challenging design
task.
This work attempts to lay the foundations for a robust optimization strategy for
the design of an airbox by coupling a 3D-steady flow Computational Fluid
Dynamics (CFD) model to an automatic optimization process. The objective is
to formulate a strategy that can be built upon in future to encompass unsteady
flow and multi-cylinder engines.
The work reviews the current thinking on methods used to optimize CFD
problems and how this would apply to the optimization of an airbox for an
internal combustion engine. The investigation then continues to detail the
findings of the initial validation work on the CFD method for predicting the
pressure loss through an airbox. Two simple airboxes are tested on a steady
flow rig and the results compared to the CFD predictions.
An optimization case study is then presented based on one of the models
used for the initial validation. The study compares three different optimization
techniques and then validates the results by testing the optimum design found
by each method. A second case study is then undertaken to further validate
the results using more flexible optimization software."],"dc:identifier":["oai:pure.qub.ac.uk/portal:studenttheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1","https://pure.qub.ac.uk/en/studentTheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1"],"dc:identifier.uri":["https://pure.qub.ac.uk/files/191805462/final_Development_of_Optimisation_Methodologies_for_the_Internal_Combustion_Engine_Airbox.pdf"],"dc:language":["eng"],"dc:publisher.department":["School of Mechanical and Aerospace Engineering"],"dc:publisher.institution":["Queen's University Belfast"],"dc:relation.isreferencedby":["https://pure.qub.ac.uk/en/studentTheses/07c039b2-3a0f-4df8-a4ab-7ea8e498ecc1"],"dc:title":["Development of Optimisation Methodologies for the Internal Combustion Engine Airbox"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["Doctoral Thesis"],"dc:type.qualificationname":["Doctor of Philosophy"]},"updated_at":"2026-07-24T03:55:12Z"}