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 10 of 10 for “"Round tubes"”.
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Subcooled critical heat flux for water in round tubes,
Massachusetts Institute of Technology. Dept. of Naval Architecture and Marine Engineering. Thesis. 1965. Nav.E. (Also M.S. in Mechanical Engineering).
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Effect of micro-fin geometry on flow and heat transfer during evaporation in round tubes
… flow pattern in transparent micro-finned tubes under both adiabatic and diabatic conditions. Rather than the conventional sight-glass method (without internal micro-fin geometry in the clear tube), clear resin tubes are made by a 3D printer to reproduce the real internal geometry in the …
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Modeling heat rejection in horizontal smooth round tubes and experimental validation for R1234ze(E), R134a and R32
Heat transfer in condensers is typically divided into 3 zones: superheated, two-phase and sub cooled region. These regions, in general, are considered to be independent of each other and various correlations are available in literature to predict the heat transfer coefficient (HTC) in these regions …
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Heat transfer and flow regimes during condensation in horizontal tubes
… condensation of refrigerants in horizontal tubes was conducted. Measurements were made in smooth, round tubes with diameters ranging from 3.14 mm to 7.04 mm. Four refrigerants were tested: R-12, R-22, R-134a, and azeotropic blends of R-32/R-125 in 50%/50% and 60%/40% compositions.
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Heat transfer and visualization in large flattened-tube condensers with variable inclination
… on inclined, convective condensation in small, round tubes to large, non-circular tubes with low inlet mass flux of vapor. The steel condenser tube in this study was designed for use in a power-plant air-cooled-condenser array with forced convection of air. The tube was cut in half lengthwise …
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Investigation and characterization of pressure drop in evenly spaced twisted tapes
… twisted tape inserts on the pressure drop in round tubes. The objectives of the project were two-fold. The first objective was to characterize the development of swirl flow in sequential twisted tapes. The second objective was to create a correlation for the Darcy's friction factor as a …
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Analysis of a car door subjected to side impact
… Drop test experiments on beams with square and round cross -sections were carried out to validate the equivalent finite element model. The drop mass and height of the striker was varied such that the transient response of the isolated side impact beam matched the response of the beam in the …
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Characteristics of the Liquid Film in Horizontal Two -Phase Flow
… is not currently available. Measurements for round tubes, square tubes in two orientations, and a triangle tube in two orientations are presented. Beyond the fundamental importance of these data sets, the results are used to show that the base liquid layer tends to behave in a manner analogous …
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Development of capacitive sensor to determine void fraction in horizontal and vertical tubes
… and void fraction in horizontal and vertical tubes with R134a in the adiabatic condition and low mass flux range. Visualization results of horizontal flow patterns are compared to Wojtan-Ursenbacher-Thome flow regime map and have a good agreement. Both void fraction results for horizontal and …
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An experimental study of critical heat flux with surface modification and its analytic prediction model development
… consistent with classic understanding of CHF in round tubes using water in relatively low pressure (less than 0.2 reduced pressures). In addition, a Fluid-to-Fluid scaling model was utilized to convert the test data obtained in the simulant fluid (R-134a) into the prototypical fluid (water). The …