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dc.contributor.advisorBrophy, Christopher M.
dc.contributor.authorMyers, Charles B.
dc.date.accessioned2012-03-14T17:42:01Z
dc.date.available2012-03-14T17:42:01Z
dc.date.issued2009-12
dc.identifier.urihttp://hdl.handle.net/10945/4477
dc.descriptionApproved for public release, distribution unlimiteden_US
dc.description.abstractIn order to enhance the performance of pulse detonation combustors (PDCs), an efficient deflagration-to-detonation transition (DDT) process is critical to maintain the thermodynamic benefits of detonation-based combustion systems and enable their use as future propulsion or power generation systems. The DDT process results in the generation of detonation and can occur independently, but the required length is excessive in many applications and also limits the frequency of repeatability. Historically, obstacles have been used to reduce the required distance for DDT, but often result in a significant total pressure loss that lessens the delivered efficiency advantages of PDCs. This thesis evaluated various swept-ramp obstacle configurations to accelerate DDT in a single event PDC. Computer simulations were used to investigate the threedimensional disturbances caused by various swept-ramp configurations. Experimental tests were conducted using various configurations that measured combustion shockwave speed and flame front interactions with the swept-ramp obstacles. Detonation was verified across the instrumented section through high-frequency pressure transducers, and experimental data proved that swept-ramp obstacles successfully accelerate the DDT process with minimal pressure losses.en_US
dc.description.urihttp://archive.org/details/initiationmechan109454477
dc.format.extentxx, 91 p. : ill. ;en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.subject.lcshEngineeringen_US
dc.subject.lcshCombustion chambersen_US
dc.titleInitiation mechanisms of low-loss swept-ramp obstacles for deflagration to detonation transition in pulse detonation combustorsen_US
dc.typeThesisen_US
dc.contributor.secondreaderHobson, Garth V.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.description.funderFUNDED BY: N0001409WR20022en_US
dc.description.recognitionOutstanding Thesisen_US
dc.description.serviceUS Navy (USN) author.en_US
dc.identifier.oclc502441638
etd.thesisdegree.nameM.S.en_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineAstronautical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.verifiednoen_US


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