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dc.contributor.advisorHealey, J. Val
dc.contributor.authorMoran, Robert D., Jr.
dc.dateSeptember 1991
dc.date.accessioned2013-01-23T22:05:29Z
dc.date.available2013-01-23T22:05:29Z
dc.date.issued1991-09
dc.identifier.urihttp://hdl.handle.net/10945/26766
dc.description.abstractAccurate simulation of helicopters in an at-sea-shipboard environment is desired to provide realistic operating envelopes without incurring the enormous cost of real-time flight tests. This study examines the simulation of rotorcraft in turbulent flow by looking at previous attempts at helicopter-ship interfacing, current efforts in this area, and what will be needed in the future. Part of this study is devoted to the construction of an analytic model of the "tunnel strike" problem of the CH-46 Sea Knight helicopter that is based on measurements made over the flight deck of a model ship. A computer model was constructed, with the aim of modeling the "tunnel strike" during engagement aboard AOR type ships. The remainder of this study is concerned with the simulation of the motion of a helicopter in the turbulent wake of a DD-963 class ship. Results show that a sixth order transfer function can filter white noise to accurately model the turbulence spectra at specific points along a helicopter glide path in the wake. While a tunnel strike could not be successfully modeled using DYSCO software, a simple blade-element program was developed to show the aerodynamic forces on the rotor blades in a specific flow field over an AOR class ship flight deck. That program shows the location and magnitude of the aerodynamic forces contributing to the flapping of the rotor blades, which results in the rotor blades impacting the fuselage.en_US
dc.description.urihttp://archive.org/details/simulationofroto1094526766
dc.format.extent92 p.en_US
dc.language.isoen_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. Copyright protection is not available for this work in the United States.en_US
dc.titleSimulation of a rotocraft in turbulent flowsen_US
dc.typeThesisen_US
dc.contributor.secondreaderWood, E. Roberts
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentDepartment of Aeronautics and Astronautics
dc.subject.authorComputer simulationen_US
dc.subject.authorRotorcraften_US
dc.subject.authorTurbulent flowen_US
dc.subject.authorTunnel strikesen_US
dc.description.serviceCaptain, United States Marine Corpsen_US
etd.thesisdegree.nameM.S. in Aeronautical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineAeronautical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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