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 20 of 2033 for “"jet"”.
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A 2nd generation electrohydrodynamic jet (e-jet) printing system, parametric studies of e-jet nozzles and integrated electrode e-jet deposition
As electrohydrodynamic jet (e-jet) printing technology developments have increased in magnitude over the past few years, a low-cost and user friendly, high-resolution desktop system was developed at the University of Illinois at Urbana-Champaign. The original desktop system provided great …
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Spinning modes in orderly jet structure and jet noise
The structural response of a subsonic turbulent jet to controlled forcing has been investigated both theoretically and experimentally. An experimental study has been carried out in which a model jet was subjected to acoustic excitation in the form of circumferential modes of azimuthal wavenumber …
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Installed jet noise
… the prediction and reduction of installed jet noise, combining both analytical and experimental techniques. In the prediction part, it starts with formulating a low-order but robust isolated jet noise prediction model, based on which a remarkably fast code with pre-informed data is …
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Quantitative Acetone PLIF Measurements of Jet Mixing with Synthetic Jet Actuators
Fuel-air mixing enhancement in axisymmetric jets using an array of synthetic jet actuators around the perimeter of the flows (primarily parallel to the flow axis) was investigated using planar laser-induced fluorescence of acetone. The synthetic jets are a promising new mixing control and …
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High Speed Impinging Jet Plating: Slot Jet and Through-Hole Plating
The characteristics of two different impinging jet plating systems was investigated in this study. The local mass transfer rates for slot jet system were measured with use of sectioned electrode technique and were compared with the other previous studies. Based on the measured mass transfer …
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Jet physics at ATLAS
… to generate next-to-leading order predictions of jet cross-sections, independent of parton distribution functions, was investigated. Such methods were found to provide an accurate approximation to a standard Monte-Carlo simulation (within 1%) and enable collider data to be readily included in …
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Quasi-geostrophic jet meandering
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1980.
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Turbulent fluid jet excavation in cohesive soil : with particular application to jet grouting
This thesis reviews the jet grouting methodology, and the current state of practice and research. Current methods of prediction of jet grout diameters are highly empirical and site specific, and do not take into account the jet hydrodynamics and soil properties explicitly. A rational model to …
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The Analysis and Prediction of Jet Flow and Jet Noise about Airframe Surfaces
… These concepts exhibit situations where the jet exhaust interacts with an airframe surface. Jet flows interacting with nearby surfaces exhibit a complex behavior in which acoustic and aerodynamic characteristics are altered. The physical understanding and accurate modeling of these …
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Study of jet quenching using [gamma]-jet events in heavy ion collisions at 2.76TeV
The kinematic correlations of isolated-[gamma]+jet scatterings in proton-proton and lead-lead collisions at centre-of-mass energy of 2.76TeV per nucleon pair are studied for the investigation of the jet quenching phenomena in hot and dense QCD medium. The analysis uses collision data delivered by …
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Jet impingement on porous surfaces
… normal impingement of planar and axisymmetric jets onto a porous surface. Six different porous surfaces with open area ratios of 23, 26, 31, 37, 44 and 54% (? = 0.23, 0.26, 0.31, 0.37, 0.44 and 0.54) were placed in low speed (usually 40m/s exit velocity) air jets sufficiently far from the jet …
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Microplasma jet devices in quartz
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Water ingestion in jet engines.
Civil aircraft engines are required to operate reliably in a variety of inclement weather situations. Ingestion of airborne water has been found to cause problems for certain engine types, particularly during aircraft descent at low engine power settings. The effects of water ingestion under these …
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Jet production at hadron colliders
Hadronic jets feature in many final states of interest in modern collider experiments. They form a significant Standard Model background for many proposed new physics processes and also probe QCD interactions at several different scales. At high energies incoming protons produce beam jets. …
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Photon isolation and jet substructure
… a new photon isolation criterion inspired by jet substructure techniques. Soft drop isolation is collinear-safe and is equivalent to Frixione isolation at leading order in the small R limit. However, soft drop isolation has the interesting feature of being democratic, meaning that photons can …
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Ink jet nozzle test station
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Jet Fragmentation at the LHC
… the calculation of a broad set of semi-inclusive jet observables. We explore known observables whose distributions can now be calculated using GFFs, and construct a new class of non-associative "fractal observables" which can be described with GFFs. As an important application, we calculate the …
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The Linearized Euler Equations for Predicting Supersonic Jet Noise of a Rectangular Jet Using OpenFOAM
… the acoustics of a heated supersonic rectangular jet. The rectangular jet (RJET) results were compared against experimental data.</p> <p>The results from this work show that OpenFOAM can be used as an effective platform to develop CAA specific solvers. The leeFoam solver successfully predicted …
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The computer modelling and experimental study of confined jet mixing with application to jet pump design
As an, aid to jet pump design and performance analysis, a theoretical investigation on turbulent confined jet mixing in a non-uniform axisymmetric duct typically used in jet pumps and ejectors has been undertaken. A so-called Prandtl-Kolmogorov two-equation turbulence model, with turbulent kinetic …
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Jet Fluid Mixing Control Through Manipulation Jet Fluid Mixing Control Through Manipulation of Inviscid Flow Structures
… many industrial and propulsion devices involving jet flows. In this dissertation, two methodologies, self-excited nozzles and radially lobed nozzles, are studied and presented in order to enhance mixing in the near field of coflowing, subsonic, turbulent, free jet flows. The characteristics of the …
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