Global ETD Search
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 19 of 19 for “"slipstream"”.
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Slipstream, a data rich production environment
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1990.
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Performance and slipstream characteristics of small-scale propellers at low Reynolds numbers
… about the same performance results. Finally, the slipstreams of different propellers were measured using a 7-hole probe. Propeller slipstreams can have a large effect on the aerodynamics of lifting surfaces downstream of the propeller. Small UAVs and MAVs flying in close proximity will also fly …
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Aerodynamics of lifting surfaces in propeller slipstreams
… airfoil with chord length of 1 ft in a propeller slipstream at a freestream Reynolds number of 100,000 are presented in this study. ANSYS FLUENT was used to solve the flow equations inside the control volume. For the two-dimensional analysis, the propeller was modeled as an actuator line across …
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A Numerical Vortex Approach To Aerodynamic Modeling of SUAV/VTOL Aircraft
… a low-cost approach to preliminary modeling of slipstream effects on a finite wing. The wing aerodynamic model employs a numerical lifting-line method utilizing the 3D vortex lifting law along with known 2D airfoil data to predict the lift distribution across a wing for a prescribed upstream …
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Bridezilla Descends Upon Tokyo and Other Strange Stories
… Strange Stories</em> is a collection of dark slipstream fiction that blends elements of horror into literary fiction. Ghosts, zombies, babies with hinged jaws and shark teeth expose themes like identity, motherhood, and relationships that maintain a literary tradition of dedication to …
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First Thirty Days of Life: Examining Calf Behavioral Development in Beluga Whales (<i>Delphinapterus leucas</i>) and Pacific White-Sided Dolphins (<i>Lagenorhyncus obliquidens</i>) at One Zoological Facility
… nursing duration and frequency and rates of slipstream position than Pacific white-sided dolphin calves. Nursing behaviors and slipstream behaviors of the unsuccessful calves of both species were either inconsistent or delayed compared to the successful calves. The results of this study may …
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Between the Lines: Encoding Relations Through Body, Tool, and Algorithm
… irregular curved surfaces for the production of slipstream automobiles, toothbrushes, and even letterforms. And much like the hidden algorithms in the background of our digital tools, there is an apparatus of choreography surrounding our physical tools that encode instructions on how the body …
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Research on the Unmanned Aerial Vehicle Design
… aerodynamic properties caused by propeller slipstream. The non-intuitive aerodynamics requires a careful selection of the position of the centre of mass to ensure a trim able and stable craft with adequate static margin.
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A reduced-turbulence, reduced-entrainment electrostatic precipitator
… conducted at both ambient temperature and boiler slipstream conditions. Side flow was shown to reduce turbulence in the boundary layers of the collecting plates, but to have no significant effect on turbulence in the main gas stream (beyond the boundary layer). Side flow was shown to create a more …
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An examination of outdoor experience in the development of character in young adults with Type 1 Diabetes
… the ages of 22 and 30 participated in the Winter Slipstream weekends participated in this phenomenological research study. Through semi-structured interviews and artifact-elicitation interviews, ,{ the lived experiences of the participants were examined. Data analysis indicated that the sense of …
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Oxidation catalyst degradation in the exhaust stream of a large bore 2-stroke natural gas engine
… The oxidation catalyst was housed in a slipstream in the exhaust stream of a Copper-Bessemer GMVH12 large bore 2-stroke natural gas engine between one and two months at a time. The catalyst was periodically removed and returned to the laboratory for emissions and material testing. …
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Design and cavitation performance of contra-rotating propellers
… the rotational energy in the propeller slipstream. The application of this type of propulsive device to modern ships becomes even more attractive, considering the recent developments in electric propulsion and the increased emphasis on fuel economy. Propeller design codes are therefore …
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Development of a Miniature VTOL Tail-Sitter Unmanned Aerial Vehicle
… to predict the influence of a propeller slipstream on the freestream flow field, then the aircraft was analyzed using 3-D vortex lifting-line theory to model finite wings immersed in the flow field. Four prototypes were designed, built, and tested and the evolution of these prototypes is …
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Analysis and experiments for contra-rotating propeller
… advantages of recovering part of the slipstream rotational energy which would otherwise be lost utilizing a conventional screw propeller system. The application of this type of propulsion becomes even more attractive with the increasing emphasis on fuel economy and the improvement of …
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Aligning intent and behavior in software systems: how programs communicate & their distribution and organization
… easier to abstract away unnecessary details. The Slipstream, ALLVM, and software multiplexing methods presented here automatically reduce complexity of programs while retaining intended function of the program. This results in improved performance at both startup and run-time, as well as reduced …
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Experimental investigation of turbulent flow in the near wake of a propeller
… the blade wake at ten radial locations. The slipstream (wake) of the propeller was found to contract in the downstream direction due to pressure relaxation. High swirl velocities were found near the hub, while the region of maximum thrust was typically around 0.6R. The individual blade wake …
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A Three Dimensional Vortex Particle-Panel Code for Modeling Propeller-Airframe Interaction
… the aerodynamic panel code, with a pseudo-steady slipstream model wherein rotational effects are discretized onto vortex particle point elements. The method maintains a freedom from volume grids that are so often necessary in the existing interference models. In addition to the lack of a volume …
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Thermodynamic and Kinetic Study of Carbon Dioxide and Mercury Removal from Flue Gas in Coal Combustion Power Plants
… had a total Hg uptake of more than 14 mg/g. Slipstream testing of the sorbents, along with other novel Hg sorbents developed previously, using coal combustion flue gas showed promising and competitive results in Hg removal rate and Hg capacity. When both CO<sub>2</sub> and Hg are present in …
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Performance, Stability and Control of Electric Short Takeoff and Landing Aircraft
… is the electrically blown wing, where the slipstream of distributed, electrically-driven propellers arranged along the wing lead edge is used to enhance the wing lifting capability, enabling reductions in required field length or improvements in cruise efficiency compared to aircraft with …