Numerical and Experimental Studies on Free Piston Stirling Engines

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dc.contributor.advisorBalachandran, Balakumaren_US
dc.contributor.authorShrestha, Dibeshen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2012-07-10T05:40:22Z
dc.date.available2012-07-10T05:40:22Z
dc.date.issued2012en_US
dc.description.abstractFree piston Stirling engine (FPSE) is a closed cycle engine that converts thermal energy into mechanical energy. The focus of this thesis is on understanding limit-cycle motions in FPSEs. First, making use of reduced-order models, parametric studies are carried out to understand what FPSE parameters affect the creation of oscillatory motions. It is shown that quasi-static variations of the stiffness and the damping terms on the power piston can lead to conditions for Hopf instabilities in the system. The effect of the inclusion of a nonlinear spring term to the system is also investigated through numerical studies. The nonlinear springs include hardening springs and magnetic springs. The results, which include first results for FPSEs with hardening springs, show that nonlinear springs can help these systems realize limit-cycle motions. Finally, preliminary experimental studies conducted to realize oscillatory motions in a FPSE with a magnetic spring are also reported.en_US
dc.identifier.urihttp://hdl.handle.net/1903/12817
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pqcontrolledAlternative energyen_US
dc.subject.pquncontrolledFPSEen_US
dc.subject.pquncontrolledfree piston stirling engineen_US
dc.subject.pquncontrolledmagnetic springen_US
dc.subject.pquncontrolledschmidt analysisen_US
dc.subject.pquncontrolledStirling engineen_US
dc.titleNumerical and Experimental Studies on Free Piston Stirling Enginesen_US
dc.typeThesisen_US

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