An Experimental Investigation of Ejector Ramjet Performance at Static Conditions

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dc.contributor.advisorJohansen, Craig
dc.contributor.authorLong, Lisa
dc.contributor.committeememberGates, Ian
dc.contributor.committeememberBauwens, Luc
dc.date2024-11
dc.date.accessioned2024-09-18T21:02:04Z
dc.date.available2024-09-18T21:02:04Z
dc.date.issued2024-09-16
dc.description.abstractThe performance of a methane-fueled ejector ramjet (ERJ) equipped with the Atlantis Intake System (AIS) was tested at static conditions. For static tests with no forward velocity, the AIS ERJ successfully entrained and mixed the stagnant surrounding air to create a stoichiometric mixture of 17.2 when the Mach 2 primary jet’s total pressure was 625 ± 25 kPa. Combustion was most stable when the air-fuel mixture was lean. The maximum positive thrust and specific impulse were 22 ± 3 and 189 ± 33 s, respectively, when the primary jet total pressure was 400 kPa. Engine performance was compared to a 1D Ejector Ramjet (1D-ERAM) solver and showed good agreement with a 95% confidence interval during combustion. The solver did not accurately predict the combustion limits of the engine. Additional tests were performed with a nitrogen-diluted fuel jet, which extended the range of conditions for which the ERJ could sustain combustion. The engine demonstrated increased thrust when the primary jet’s total pressure was increased. The inverse Damkohler number was investigated as a tool for predicting engine blowout and provided improved resolution of the engine’s combustion limits, which could be applied to the 1D-ERAM solver
dc.identifier.citationLong, L. (2024). An experimental investigation of ejector ramjet performance at static conditions (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.
dc.identifier.urihttps://hdl.handle.net/1880/119767
dc.language.isoen
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgary
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectEjector Ramjet
dc.subjectAerospace Propulsion
dc.subjectCombustion
dc.subjectExperiment
dc.subject.classificationEngineering--Aerospace
dc.subject.classificationEngineering--Mechanical
dc.titleAn Experimental Investigation of Ejector Ramjet Performance at Static Conditions
dc.typemaster thesis
thesis.degree.disciplineEngineering – Mechanical & Manufacturing
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.thesis.accesssetbystudentI do not require a thesis withhold – my thesis will have open access and can be viewed and downloaded publicly as soon as possible.
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