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 13 of 13 for “"Bypass flow"”.
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An Effective Methodology for Thermal-Hydraulics Analysis of a VHTR Core and Fuel Elements
… largely due to the 3-D simulation of the helium flow in the 10 m long coolant channels in the reactor core and the need to examine the effects of helium bypass flow in the interstitial gaps between the core fuel elements. This research, performed at the UNM-ISNPS, developed an effective …
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Control of Herbicide Sprayers With Soil Organic Matter as an Input (Illinois)
… agricultural field sprayers was designed using bypass nozzles to minimize changes in spray pattern and drop size. Sprayer travel speed and the organic matter in the soil under the sprayer were the design inputs. Step, impulse and sinusoidal demands on the system were made and the resulting flows …
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Flow and pressure drop on the shellside of cylindrical heat exchangers
… work presents pressure distributions and fluid flow patterns on the shellside of a cylindrical shell-and-tube heat exchanger. The apparatus used was constructed from glass enabling direct observation of the flow using a dye release technique and had ten traversable pressure instrumented tubes …
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Experimental investigation of an ejector as a refrigerant expansion engine
… in the resulting ejector cycle was a hot gas bypass arrangement which was found to effectively control the condenser and evaporator flowrate. Hot gas bypass was used instead of a throttling valve, which would have undermined the benefit of the ejector. Experiments were conducted by running the …
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Infant Heart Transplant: Perioperative Indicators of Neurocognitive Development
… also an unexpected interaction between minimum bypass flow rate and average mean arterial pressure in relation to outcome. The incidence and predictability of learning disabilities are also discussed.</p>
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Wind tunnel testing of a nacelle bypass concept for a quiet supersonic aircraft
… of low-noise supersonic aircraft is the high-flow nacelle bypass concept in which an outer nacelle surface is used to encircle the asymmetric external engine protuberances of a traditional turbine engine. Although this bypass flow may reduce the overall sonic boom signature of the vehicle, the …
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Environmental tradeoffs of denitrifying woodchip bioreactors
… Drainage Guide. Routines were added to use inflow and outflow data to derive hydraulic conductivity, and to use inflow data and stop log settings to estimate bypass flow. Hydraulic conductivity was found to lag flow by 6 days suggesting biofilm growth during low flow events and the flushing of …
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Full-Scale Testing Of A Passively Modulated Oil-To-Air Cooler
… system cooler uses heat exchangers placed in the bypass flow stream, using the bypass air as a heat sink. This leads to unwanted flow structures and total pressure losses within the bypass, increasing the thrust-specific fuel consumption. There exists an opportunity to improve the performance of …
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Computational Fluid Flow Analysis of the Enhanced-Once through Steam generator Auxiliary feedwater system
… steam generator (OTSG) is a single pass counter flow heat exchanger in which primary pressurized water from the core is circulated. Main Feedwater is injected in an annular gap on the outer periphery of the steam generator shroud such that it aspirates steam to preheat the feedwater to saturation …
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The role of the apoplastic transport barriers for radial water and ion uptake in rice (Oryza sativa L.) and corn (Zea mays L.) roots
… their resistances to the overall radial water flow are additive. However, the hydraulic resistance of the OPR was smaller by a factor of 30 than the overall values of root Lpr. Hence, the endodermis rather than the OPR limits water uptake. It appears that the OPR is constructed to provide a …
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Characterisation of sedimentary structure and hydraulic behaviour within the unsaturated zone of the Triassic Sherwood Sandstone aquifer in North East England
… However, results suggest that vertical flow in the unsaturated zone may be impeded by the presence of relatively impermeable fine sandstone units, which correspond to bar top and slack water environments, and occasional mudstone layers representing overbank deposits. This restriction to …
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Hydraulic evaluation of a denitrifying bioreactor with baffles
… bioreactor design considerations include a bypass flow pipe to prevent significant reduction of drainage capacity in the field. This practical need for a bypass pipe results in a portion of the annual flow volume being untreated which limits a bioreactor’s overall N removal performance. …
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Flash gas bypass concept utilizing low pressure refrigerants
Flash gas bypass represents one of the prospective approaches to improve the efficiency of various small scale heat transfer systems that utilize refrigerant as a working fluid. It is characterized by the bypass of vapor created throughout the expansion process around the evaporator. As the …