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 “"Flow characteristic"”.
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Heat Transfer and Flow Characteristic Study in a Low Emission Annular Combustor
… characterized by highly swirling and expanding flows that makes the convective heat load on the combustor liner gas side difficult to predict and estimate. A coupled experimental-numerical study of swirling flow and its effects on combustor liner heat transfer inside a DLE annular combustor …
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Experimentelle Untersuchung der Strömungscharakteristik und des Wärmeübergangs bei welligen Rieselfilmen
… present work experimental investigations of the flow characteristic and heat transport of wavy silicone oil films were accomplished with different angles of inclination (13°, 30°, 60° and 90°) and Kapitza numbers, which allow a deeper view into the structure and the heat transport phenomena. From …
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Rheological examination of domestic sewage sludge
The flow parameters involved in the transportation of sludge from the place of origin to the place of disposal has long been a problem to the sanitary engineer. To obtain the greatest efficiency in the design of pumps and pipelines the properties of sludge need to be thoroughly understood. This …
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Effective properties for flow in heterogeneous porous media
Modeling of groundwater flow and chemical transport calls for a good characterization of heterogeneity of soil properties. The effects of variabilities of soil properties at local scale on the mean behavior of heterogeneous flows were investigated via Monte Carlo method. Assuming log-normal …
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A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector
… tested as part of a base line test investigating flow within a diffuser-collector. Facility controls allowed the quarter scale model to match both Reynolds number and Mach number. Mass averaged conditions at the diffuser inlet during testing were determined as 1.939 ? 106 for Reynolds number based …
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Development of Advanced Image Processing Algorithms for Bubbly Flow Measurement
An accurate measurement of bubbly flow has a significant value for understanding the bubble behavior, heat and energy transfer pattern in different engineering systems. It also helps to advance the theoretical model development in two-phase flow study. Due to the interaction between the gas and …
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Geometry optimization of dry ice blasting nozzle for the noise reduction using experimental validation
… project are to examine the dry ice blasting’s flow characteristic on the influence of noise emission and to establish optimum parameters affecting the acoustic noise emission. The experimental validation on the effect of impact force and noise emission for optimum nozzle design is investigated. …
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Numerical analysis of a fin-tube plate heat exchanger with winglets
… work, numerical analysis of heat transfer and flow characteristic using longitudinal vortex generators (LVGS) in fin and flat tube heat exchanger has been presented. Conjugate heat transfer 3D numerical model has been developed and successfully carried out. Rectangular winglets were set in …
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Comparison fine spray nozzle for two phase flow within experimental and simulation
… and experimental. The observation focused on flow characteristic that produce by mist spray. Multiphase nozzle were used with air and water as a medium . Six pressure inlet different are used during the experiment. They are 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 bar. They are three type of nozzles …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
… the fuel-air ratio and the size of the PCC. The flow characteristic results obtained, for the case of PCC and no PCC incorporated were contrasted. Flow characteristics were looked at in the wake of combustion,focusing on convection, temperature distribution, conduction, and radiative heat …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
… the fuel-air ratio and the size of the PCC. The flow characteristic results obtained, for the case of PCC and no PCC incorporated were contrasted. Flow characteristics were looked at in the wake of combustion,focusing on convection, temperature distribution, conduction, and radiative heat …
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Simulation of solid fuel combustion in the cyclone combustion chamber using fluent-14.0
… objectives of this study are to demonstrated the flow characteristic, identify velocity and temperature distributions inside the combustor and to attain the complete combustion process with stoichiometry amount of air is used. The parameters of the simulation were run by using multiphase model, …
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Experimental Investigation of Turbulent Flows at Smooth and Rough Wall-Cylinder Junctions
Junction flows originate from the interaction between a fluid moving over a wall with an obstacle mounted on the same surface. Understanding the physics of such flows is of great interest to engineers responsible for the design of systems consisting of wall-body junctions. From aerodynamics to …
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Variability of black-hole accretion discs: a theoretical study
… is based on the stability of transonic accretion flows and its connection to a disc instability that takes the form of propagating waves (viscous overstability). The time-dependent study looks at the conditions under which the transition between subsonic disc-like accretion, which occurs at large …
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Computational fluid dynamics (CFD) modelling of critical velocity for sand transport flow regimes in multiphase pipe bends.
… hydrocarbon production. Knowledge of the flow characteristics of solid particles in fluids when transported in pipelines is important, in order to accurately predict solid particle deposition in pipelines. This thesis presents the development of a three-dimensional (3D) computational fluid …
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Assessing the Near-Wall Hemodynamics in the Left Coronary Artery Using CFD
… thesis is to computationally investigate the flow mechanics and the near-wall hemodynamics associated with the different take-off angles in the left coronary artery of the human heart. From this study, we will be able to evaluate if the increase in the take-off angles of the left coronary …
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An Experimental Study on the Effects of Heat and Chemical Inhibitors on the Flow Behaviour of Waxy Crude Oils. The Effects of Heat and Chemical Inhibitors on the Rheological Properties of Waxy Crude Oils with regard to Pumping in Pipelines
… the crude and crude gel properties and flow conditions. The research problem was approached by characterizing the crude gel with and without additives using chromatography (GC), differential scanning calorimetry (DSC), cross polarised microscopy (CPM), controlled stress and oscillatory …
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Development of Co-processed Plasticized Cellulose Acetate for Sustained Release Matrix Tablets
… aims in our study. One is to modify the physical characteristic of the CA by using a co-processing technique and increase the capacity of cellulose acetate to control the drug release rate. The other is to modulate the drug release rate from the hydrophobic sustained release tablets and apply …