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 11 of 11 for “"Momentum Ratio"”.
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CHARACTERIZATION OF THE INITIAL SPRAY FROM A JET IN CROSSFLOW
… and Particle Image Velocimetry (PIV) techniques. Momentum ratio and gas Weber number were varied to study their effects on the column trajectory, spray trajectory, breakup locations and spray characteristics after column breakup. Correlations for column trajectory, spray trajectory, breakup …
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Wind-induced dispersion of building exhaust in an urban environment : a full-scale and wind-tunnel study
… study can be carried out to predict peak concentrations at critical locations. However, neither ASHRAE models nor wind tunnel modeling have been thoroughly validated with full-scale data. For the purpose of evaluating empirical formulas and wind tunnel modeling techniques, four field tests on the …
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Effect of Flow Distortion on Fuel Mixing and Combustion in an Upstream-Fueled Cavity Flameholder for a Supersonic Combustor
… isolate the effects of a given combustor configuration. However, such studies tend to ignore the effects of a shock train created by the vehicle installation and that this shock train changes over the flight envelope. Consequently, the performance of a given configuration is measured without …
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Study of jet quenching using [gamma]-jet events in heavy ion collisions at 2.76TeV
… at CERN. The angular correlation, the transverse momentum ratio and the rate of mono-photon events are measured and their dependence on the collisional impact parameter is examined in lead-lead collision. The results of proton-proton collisions are used as the reference to which the lead-lead …
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Measuring flow and mixing at stream confluences using large-scale particle image velocimetry, in-stream techniques, and small unmanned aerial systems
… Flow at two river confluences under high and low momentum ratios are investigated in unprecedented spatial detail. Results of this investigation reveal similarities between flow at each confluence and the standard conceptual model of flow at confluences, yet also finds important differences …
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Fluidic Jet Turbulence Generators for Deflagration to Detonation Transition in Pulsed Detonation Combustors
… to effectively accelerate the turbulent deflagration flame front to detonation velocity in the shortest possible distance while using a single Jet in Cross Flow (JICF). Jets in crossflow, depending on orientation and momentum ratio, can induce two types of flow structures that propagate …
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Rates and patterns of temperature mixing at a small stream confluence under variable incoming flow conditions
… understood. This study examines the influence of momentum flux ratio, total discharge, and density differences between incoming flows on mixing at a small stream confluence. Temperature data reveal that rates and patterns of mixing depend on event-specific combinations of the three factors. The …
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Dynamic Modeling and Lateral Stability Analysis of Long Combination Vehicles
… can more broadly apply to various truck configurations. The simulation results indicate that increasing the trailer wheelbase reduces rearward amplification due to the damping effect of the longer wheelbase. A larger momentum ratio due to increased trailer gross weight increases rearward …
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Analysis of film cooling performance of tripod hole
… effectiveness and heat transfer coefficient ratio. In order to gauge the performance, other standard hole geometries were also tested and compared with. Following the results from the flat plate test rig, film cooling performance was also evaluated on the surface of an airfoil. Adiabatic …
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Showerhead Film Cooling Performance of a Turbine Vane at High Freestream Turbulence in a Transonic Cascade
… hole shape, coolant-to-freestream blowing ratio, coolant-to-freestream momentum ratio, surface curvature, approaching boundary layer state, Reynolds number, Mach number, combustor-generated high freestream turbulence, turbulence length scale, and secondary flows just to name a few. Until …
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The Effect of Density Ratio on Steep Injection Angle Purge Jet Cooling for a Converging Nozzle Guide Vane Endwall at Transonic Conditions
… investigation of the effects of density ratio on endwall thermal performance at varying blowing rates for a typical nozzle guide vane platform purge jet cooling scheme. An axisymmetric converging endwall with an upstream doublet staggered cylindrical hole purge jet cooling scheme was …