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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 268 for “"Hypersonic"”.
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Hypersonic phononic crystals
… acousto-optical properties. This thesis explores hypersonic phononic crystals as means to achieve control over high frequency acoustic phonons. An integrated approach to fabrication, measurement and analysis of hypersonic phononic crystals with band gaps in the GHz range is presented. First, the …
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Hypersonic Glide Vehicles: Implications for Strategic Stability in the Coming Hypersonic Era
Hypersonic glide vehicles represent one of the first major strategic weapons developments since the end of the Cold War. These missiles, which are capable of carrying both nuclear and non-nuclear payloads threaten to alter the strategic balance of terror that has kept that great powers at peace …
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Optimal hypersonic pursuit evasion.
Thesis. 1975. Sc.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Adaptive control of hypersonic vehicles
The guidance, navigation and control of hypersonic vehicles are highly challenging tasks due to the fact that the dynamics of the airframe, propulsion system and structure are integrated and highly interactive. Such a coupling makes it difficult to model various components with a requisite degree …
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Turbulence modeling in hypersonic inlets
… models when applied to flow through a Mach 7.4 hypersonic inlet. The analysis, which is two-dimensional, is done by comparing computational results from a Parabolized Navier Stokes code, with experimental data. The McDonald Camarata (MC) and Baldwin Lomax (BL) models were the two zero-equation …
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Numerical Investigations of Magnetohydrodynamic Hypersonic Flows
… simulations of magnetohydrodynamic (MHD) hypersonic flow are presented for both laminar and turbulent flow over a cylinder and flow entering a scramjet inlet. ANSYS CFX is used to carry out calculations for steady flow at hypersonic speeds (Mach number > 5). The low magnetic Reynolds …
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Flameholding methods for compact hypersonic systems
… enhancement for ethylene-fueled compact hypersonic systems were characterized using high-speed pressure measurements and imaging in the high-enthalpy supersonic facility ACT-II. “Hypermixer” geometries consisting of tapered wedges with and without expansion-ramp vortex generators were …
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THE NEWTONIAN APPROXIMATION IN DUSTY HYPERSONIC FLOWS.
Dept. of Mathematics and Statistics. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1979 .W553. Source: Dissertation Abstracts International, Volume: 40-09, Section: B, page: 4335. Thesis (Ph.D.)--University of Windsor (Canada), 1979.
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Dynamic pressure sensors for hypersonic flow measurements
… of an acoustic pressure sensor tailored for hypersonic boundary layer flow measurements. Hypersonic boundary layer flows comprise shocks, laminar-to-turbulent transitions, and high-frequency turbulence with small (sub 1-mm) characteristic length scales. Non-invasive acoustic pressure …
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Robust intelligent flight control for hypersonic vehicles
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Adaptive control of a generic hypersonic vehicle
… to the Road Runner six-degree-of-freedom generic hypersonic vehicle model. Uncertainty in control effectiveness, longitudinal center of gravity location, and aerodynamic coefficients are introduced in the model, as well as sensor bias and noise, and input time delays. The performance of the …
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Hypersonic test facilities: requirements analysis and preliminary design
… interest in aerospace vehicles operating in the hypersonic regime. With this interest has come a need to not only reestablish the hypersonic test capability that was available in the 1960s but to enhance this capability to meet the demanding needs of today's proposed vehicles. This will require …
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Experimental and numerical study of hypersonic aeroelastic intakes
… An aeroelastic intake was tested in a hypersonic wind tunnel to assess its dynamic flowfield, structural response, and performance. The experiments were informed with static 2D, full-scale static 3D, and fully coupled 2D and 3D aeroelastic simulations. The intake studied was a planar …
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Study of hypersonic aerodynamics using free flight experiments
… and designing control algorithms. Today, most hypersonic vehicle AEDBs are created numerically and validated with force balance measurements on fixed, sting-mounted models in wind tunnels. However, the results can be challenging to resolve and are unavoidably compromised by sting interference. …
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Laser absorption spectroscopy for investigation of hypersonic propulsion
… technology have arisen from recent interest in hypersonic propulsion. Progress in ground-testing capabilities has accelerated this technological advancement, providing repeatable and controllable experimentation at lower costs than flight tests. A primary challenge of carrying out experiments in …
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Modeling of boundary layer thermochemistry in hypersonic flows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Hypersonic flight strategies for supersonic retropropulsion at Mars
… supersonic parachute systems. This work explores hypersonic flight strategies appropriate for use with supersonic retropropulsion systems at Mars. Optimal control techniques are used to determine hypersonic bank-angle profiles that achieve favorable supersonic retroprolusion ignition states. …
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Air-data estimation for air-breathing hypersonic vehicles
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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