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 20 of 398 for “"recirculation"”.
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Inlet Recirculation in Radial Compressors
… feature of these flow conditions is inlet recirculation. It causes a large portion of flow to be expelled through the rotor inlet, creating a blockage ring on the casing. While on the one hand, inlet recirculation is the main loss-source at low-speed and low-flow within centrifugal …
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Simulation of peanut drying incorporating air recirculation
… simulation model was adapted to incorporate recirculation. A heat and mass balance computer model was developed to enable the determination of heat energy input. Laboratory crop dryers were designed and constructed to conduct experiments to verify the simulation models. Five batches of …
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Hydrothermal liquefaction of spirulina with aqueous phase recirculation
… wastewater. This study mainly focuses on the recirculation of the aqueous phase from HTL in order to effectively address the aqueous phase treatment problems. Spirulina, a kind of high protein content microalgae, is chosen as a promising feedstock in this study for bio-crude oil production. In …
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Investigation of suction recirculation in rocket pump inducers
… the outer 30 percent of the blade height. Inlet recirculation and cavitation performance are the main concern of this thesis. The literature review focuses on these two areas and on previously performed inducer calculations. The calculation grid of the original design was altered for the two …
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Boiler feed pump low load – leak off recirculation study
… These plants make use of a leak off or recirculation system that diverts some of the flow back to the feed water tank, ensuring that a minimum flow through the pump is maintained at low load and start-up operating conditions. The recirculation valve, also known as a leak off valve, …
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Investigation of a simulation model for peanut drying incorporating air recirculation
… equations. The energy saving potential of air recirculation was also investigated. Four tests consisting of eleven drying experiments were conducted in Fall, 1986. Two air recirculation schedules were employed and three average air flow rates were used. An experimental procedure was developed …
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Simulation and Validation of Two-Component Flow in a Void Recirculation System
… the suction side of the pump in ECCS, a Void Recirculation System (VRS) experiment was conducted for a proof of concept purpose. While many studies have been oriented in studying two-component flow behavior in ECCS, none of them propose a solution to minimize air entrainment. As a consequence, …
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Large-eddy simulations of recirculation zones in channel-type molten salt reactors
… main concern is the entrainment of fuel salt in recirculation zones and the subsequent creation of localized hotspots. Therefore, we investigated the presence of such recirculation zones and the effect of the tip-shape on turbulence and stationary vortices in the upper plenum. We analyzed the …
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The autoignition characteristics of turbocharged spark ignition engines with exhaust gas recirculation
… abatement approach studied entails the recirculation of burned exhaust gasses which serve to dilute the air-fuel mixture and reduce maximum unburned gas temperatures Experimental testing was performed on two different types of exhaust gas recirculation (EGR) system - one which extracts …
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Chaotic advection and mixing in a western boundary current-recirculation system : laboratory experiments
… a boundary current and flanking horizontal recirculations in a 'sliced-cylinder' rotating tank laboratory experiment. Two flow configurations are investigated: a single recirculation and a double, figure-8, recirculation. The latter case involves a hyperbolic point, while the former does …
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The entrainment and homogenization of tracers within the cyclonic gulf stream recirculation gyre
… of tracer associated with the Northern Recirculation Gyre of the Gulf Stream (NRG) are studied to try to obtain information about the flow. An advective-diffusive numerical model is implemented to aid in the investigation. The model is composed of a gyre adjacent to a boundary current in …
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A tomographic view of the Gulf Stream southern recirculation gyre at 38N̊, 55W̊
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Chaotic advection and mixing in a western boundary current-recirculation system : laboratory experiments
… a boundary current and flanking horizontal recirculations in a 'sliced-cylinder' rotating tank laboratory experiment. Two flow configurations are investigated: a single recirculation and a double, figure-8, recirculation. The latter case involves a hyperbolic point, while the former does …
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The entrainment and homogenization of tracers within the cyclonic gulf stream recirculation gyre
… of tracer associated with the Northern Recirculation Gyre of the Gulf Stream (NRG) are studied to try to obtain information about the flow. An advective-diffusive numerical model is implemented to aid in the investigation. The model is composed of a gyre adjacent to a boundary current in …
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Biosecurity in the Recirculation Sector of Finfish Aquaculture in the United States and Canada
… research was the practice of biosecurity in the recirculation sector of finfish aquaculture in the United States and Canada. Specifically, this research: 1) identified and characterized finfish recirculation facilities in the United States and Canada; 2) assessed biosecurity utilization in these …
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A tomographic view of the Gulf Stream southern recirculation gyre at 38°N, 55°W
… fields at the northern extent of the southern recirculation gyre. For ten months (November, 1988 through August, 1989), a pentagonal array of tomographic transceivers was situated in a region centered at 38°N, 55°W as part of the eastern array of the SYNOP (SYNoptic Ocean Prediction) …
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An investigation into the impact of residual reagents on flotation in response to process water recirculation
In the mineral pulp phase of the flotation process, water makes up about 80-85% of the constituents, thus making water an important component. The increasing scarcity of water has resulted in greater environmental restrictions which have led to the necessity of mine operations recycling water from …
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Biological and economical feasibility studies of using seaweeds Ulva lactuca (Chlorophyta) in recirculation systems in abalone farming
… the differences between a commercial gravel bed recirculation system to an existing flow through system. These studies were carried out at two abalone farms: Danger Point (I & J) (140 km east of Cape Town) and at Jacobs Bay (JSP) (120 km north of Cape Town. South Africa). In both studies no …
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