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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 54 for “"back pressure"”.
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Reducing booster-pump-induced contaminant intrusion in Indian water systems with a self-actuated, back-pressure regulating valve
… is to supplement the water system's pressure by using a household, or residential, booster pump. When such booster pumps are directly connected to the water utility's supply pipe, without an underground isolation tank (sump), they often induce negative pressure in the supply pipe …
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An investigation on the variation of the pressure distribution for compressible laminar flow in a choked-flow tube due to changes of the back pressure
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1961
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Effects of engine operating conditions on catalyst light-off and combustion variability
… %. Previous research suggests that exhaust gas back pressure could potentially improve converter light-off, though a thorough understanding is absent. With an experimental approach, the influence of back pressure on the converter reaction kinetics was investigated with a custom-built flow bench. …
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A study of tip-leakage flow through orifice investigations
… of the discharge coefficient as a function of back pressure ratio for a sharp-edged orifice and long orifices with an l/d from 1/2 to 8. The discharge coefficient measurements indicate the mass flow rate in an orifice with an l/d of approximately 2 is the largest and the flow rate in a …
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UNSTEADY PRESSURE MEASUREMENTS IN A SUPERSONIC INLET DURING UNSTART SIMULATIONS
Unsteady pressure behavior during inlet unstart is a critical factor in understanding the performance and stability of supersonic systems. This thesis will investigate the unsteady pressure measurements within a supersonic inlet during unstart. By using a model developed by Ben Nikaido, Kulites …
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Theory of proton exchange membranes fuel cells and the testing of performance characteristics of polymer electrolyte membranes
… the contents of the two gas lines are known, the back pressure is controlled, the operating temperature of the fuel cell is known and the ohmic resistances of the cell are known. The voltage output will vary with the current density that the cell is loaded with. To completely characterize the fuel …
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Microfluidic Platform for Vascularized Tissue Models
… systems. The platform delivers pneumatic pressure and vacuum signals to drive fluid flow and pressure on tissue culture devices with integrated pumps and back-pressure regulators. The mechanical performance of the pumps and back-pressure regulators is characterized. Tissue compartments in …
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Using auxiliary gas power for CCS energy needs in retrofitted coal power plants
… generator (HRSG), gas turbine with HRSG and back pressure steam turbine, and natural gas boiler with back pressure steam turbine. The capital cost of the MEA unit is estimated using the Aspen Icarus Process Evaluator, and the capital cost of the external GT plants are estimated using the …
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Reliable Ethernet
… to the Ethernet switches to implement a back pressure based flow control algorithm. This back pressure algorithm utilizes a modified version of the Random Early Detection (RED) algorithm to detect congestion.</p> <p>Our simulation results show that the algorithm can quickly recover from …
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Experimental and analytical investigation for diesel smoke elimination
… its high efficiency and a minimal increase in back pressure of the engine, appears to be the most promising one to counter the challenging requirements in the future. Electrohydrodynamic analysis was conducted by solving the mass, momentum conservation equations, the k-$\varepsilon$ turbulence …
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Compressibilidade unidimensional da argila cinza do Rio de Janeiro em Botafogo
… consolidation caused by reduction of hydraulic pressure of a confined watertable. The equipment utilized, a hydraulic oedometer manufactured by W. Farrance Co. permitted the use of back pressure and the measurement of porewater pressure on the non-drained surface. Comparisons are made between …
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An economic study of a proposed 5000 kw three stage extraction condensing turbo-generator unit in the Virginia Polytechnic Institute heating and power plant
… that the proposed 5000 Kw two stage extraction back pressure turbo-generator would generate while meeting the heating and process steam demand. Curve No. 4 shows the total heating and process steam demand. The area under curve No.1 represents the total electric load in kilowatt-hours on the …
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Routing and Transport Layer Protocols for Wireless Networks
… which uses hop-by-hop rate control with back-pressure. We show that our protocol has improved fairness properties compared to TCP based protocols.
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After treatment and turbocharger effects on emissions of a diesel engine
… and air capacitor to ensure that the back pressure doesn't take away too much power and increase fuel consumption.
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Economy characteristics of V.P.I. Turbo-generator units
… Institute Heating and Power Plant has one back-pressure turbine and one condensing, bleeder-type turbines. Either of these units is capable of carrying the present electrical load. When, due to electrical load limitations, the low-pressure steam available is insufficient, the reducing …
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Numerical Simulation of a Liquid Jet Atomization and Break-Up Using ANSYS-CFX 12.0
… between the atomization characteristics of a pressure jet atomizer and an air-blast atomizer is shown. By employing a Lagrangian particle tracking method to track the path of the liquid particles, the liquid jet/spray phenomena was studied in light of low and high back pressure environments. …
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Estudo da permeabilidade e estrutura de solo-cal
… uses compressed air and permits saturation by back pressure. This apparatus is described and its use in routine work is explained. The permeability study was divided into three steps: first, the testing of pure soil samples; second, testing os soil-lime with no curing; and third, soil-lime …
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Cooperative congestion control in power grid communication networks
… reassignment; c) Cooperative coordination and back-pressure among neighboring nodes. It then yields real-time PMU data guarantees during transient traffic pattern changes and/or overload situations. Our experiments confirm that the framework delivers real-time performance very well under …
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The use of biomass for electric power generation in the South African and Zimbabwean saw-milling industry
… is that by passing steam through a condensing or back pressure turbine the entire power demand of a saw-mill can be met as well as the heat for the kilning process. Due to the situation of unbalanced load that persists at nearly all the saw-mills, there is a surplus of power that is often …
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Opposing effects of recirculated gases during cranking on cold start of diesel engines
… cylinder during the cranking period are recycled back into the intake manifold using two different methods. In the first method the engine-out gases during cranking are recirculated into the intake manifold and their rate is controlled by a CGR (Cranking Gases Recirculation) valve, without …
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