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 16 of 16 for “"Turbulent jets"”.
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Dynamics of quasi-two-dimensional turbulent jets
The study of quasi-two-dimensional turbulent jets is relevant to chemical reactors, the coking process in oil refinement, as well as rivers flowing into lakes or oceans. In the event of a spillage of pollutants into a river, it is critical to understand how these agents disperse with the flow in …
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The use of turbulent jets to destratify the Charles River Basin
This study examines the feasibility of using turbulent jets to destratify the Lower Charles River Basin between the Longfellow and Craigie Bridges between Boston and Cambridge. The basin is currently filled with salt water that intrudes from the downstream dam and the resulting vertical density …
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Numerical Investigation using RANS Equations of Two-dimensional Turbulent Jets and Bubbly Mixing layers
… investigations of two-dimensional single-phase turbulent jets and bubbly mixing layers using Reynolds-Averaged Navier-Stokes (RANS) equations. The behavior of a turbulent jet confined in a channel depends on the Reynolds number and geometry of the channel which is given by the expansion ratio …
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Development & Validation of the Acoustic Analogy Code for Jet Noise Predictions
… of the code to predict acoustic radiation from turbulent jets is briefly discussed.</p>
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A theoretical and experimental study of the impingement of two subsonic jets
… of the characteristics of two impinging plane turbulent jets for the purpose of under1tanding the performance of proportional fluid amplifiers and momentum-exchange devices . The jet deflection angle was determined through the application of the free-streamline theory for two normally impinging …
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Compressible Flow Analysis of Thrust Augmenting Ejectors
… the Navier -Stokes Equations and the theory of turbulent jets. The control volume approach uses integrated forms of the conservation equations of mass, momentum and energy. It is chosen in the first part of the study since it affords the best vehicle for the parametric studies required to …
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Modeling the Effect of Particle Diameter and Density on Dispersion in an Axisymmetric Turbulent Jet
… entrainment behavior within axisymmetric turbulent jets is of significant interest to many areas of study. Research into multiphase flows within turbulent structures has primarily focused on specific geometries for a target application, with little interest in generalized cases. In this …
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Passive Scalar Measurements In Actively Excited Free Shear Flows
… transfer characteristics of two actively excited turbulent jets. This thesis describes the acquisition and analysis of phase-locked concentration field data using planar Mie scattering from smoke particles and planar laser-induced fluorescence of acetone. Both techniques were shown to be effective …
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Study of airflow and thermal stratification in naturally ventilated rooms
… conducting a thorough study of the physics of turbulent jets and plumes, their development in room-sized enclosures, and their effect on the airflow and heat transfer dynamics in a room. Additionally, it was necessary to investigate, using Computational Fluid Dynamics, the effect of certain …
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The effect of double diffusion on the dynamics of turbulent plumes and jets
… effect of double diffusion on the dynamics of turbulent plumes and jets. Although it consists of seven distinct chapters, the work presented here can be broadly broken down into two parts. The first part addresses the effect of double diffusion on the rate of entrainment in turbulent plumes in …
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Physical suitability of sites for community-scale tidal power generation
… tool, using the advected surface signature of turbulent structures to infer a highly-resolved, site-wide measurement of surface velocity that is difficult, if not impossible, to obtain by other assessment methodologies. Previous particle image velocimetry techniques, typically applied in a …
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Numerical Investigations of a Pipe Jet With Coil Inserts With and Without Crossflow
… numerical study of coil-inserted elevated turbulent jets, aimed at advancing the understanding of passive flow control mechanisms and their effects on both free jet and jet in crossflow (JICF). It provides new insight into the fundamental physics of swirl-assisted mixing and offers a …
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Understanding and measuring flow in aortic stenosis with MRI
… areas the velocity and ow data obtained in these turbulent, high velocity jets must be accurate. In this thesis, non-stenotic and stenotic phantoms were designed and constructed to experimentally interrogate the error. It was determined that signal loss, due to intravoxel dephasing, decreased the …
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Lagrangian dynamics of turbulence: Applications with 3D particle tracking velocimetry
… and mostly focused on homogeneous and isotropic turbulent flows. In this work, I optimized a customized three-dimensional Particle Tracking Velocimetry (3D-PTV) to explore the Lagrangian dynamics of selected turbulent problems. 3D-PTV is a quantitative flow measurement technique that aims to …