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.
Results
Showing 1 to 20 of 48 for “"water jet"”.
-
Experiments on the stability of an axisymmetric water jet
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1964
-
Homodyne studies of light scattered from a turbulent water jet.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
-
Particle ejection system : target particle recovery using a transient water jet
… and mining applications have used air jets and water jets to eject particles ranging in weight from a few grams to several hundred. With the current trends in mechanization leading towards higher processing speeds, these traditional methods have been found to be unsuitable: they have …
-
Designing a low cost XY stage for abrasive water jet cutting
… design of an inexpensive XY stage for abrasive water jet cutting machine starting with a set of functional requirements and ending with a product. Abrasive water jet cutting allows for mass customization of 2D parts, such as inlaid tiles. Most water jet cutters are based on a prismatic-prismatic …
-
Flow characteristics of a transverse water jet into an unconfined water channel
The flow pattern of a transverse jet in a crossflow is complex due to the interaction between the jet and the crossflow. This interaction plays a significant role in practical fluid mixing including effluent discharge in water, film cooling and chemical mixing chamber. In this research, the flow …
-
A tissue tensioner to limit water injection during high pressure water jet debridement
… technology that uses two high-speed impinging water jets to excise necrotic tissue. However, this device potentially causes accidental injection of water into healthy tissue beneath the wound bed, which can cause injury and necrosis in the healthy tissue. The purpose of this thesis is to …
-
Laser Doppler anemometry measurements of a confined turbulent water jet with a uniform background flow
An axisymmetric, turbulent water jet with several very slow, coflowing external streams was measured with a frequency shifted laser Doppler anemometer. The objective was to approximate a jet submerged in an ambient fluid of infinite domain by using a confined jet in a uniform coflow. The coflow …
-
An Investigation of Methods to Homogeneously Entrain and Suspend Abrasive Particles in a Low Pressure Dental Water Jet
<p>During the past several decades, the water jet cutting concept has developed from a novel concept into a well-accepted machine cutting tool. With the addition of abrasive particles and the improvement of high pressure pumps, the water jet stream is currently capable of cutting through metal, …
-
Computational fluid dynamics and experimental study of the hydrodynamics of a bubble column and an air-water jet-stirred cell
… two bubbly flow systems, a bubble column and a waterjet-agitated flotation cell (Hydrojet cell), were studied by means of numerical simulations. In order to validate the bubble column CFD simulations Particle Image Velocimetry (PIV) was used. An experimental investigation about bubble size …
-
A laboratory investigation of the effect of flow rate and bedding characteristics on the interaction of a vertical water jet with an idealised soil medium
Water conveyed through pipes systems installed beneath the ground surface has become standard practice in which treated fresh water is transported to communities. This kind of water delivery is successful in many regards but also results in considerable amounts of water wastage in the form of …
-
Hydrodynamics of impinging liquid jets used in cleaning
Impinging liquid jets are widely used in industrial cleaning-in-place (CIP) systems to remove residual product or soil layers from the internal surfaces of process equipment such as tanks and vessels. The optimisation of these cleaning operations is often done empirically as a large number of …
-
L'effetto fisico del getto d'acqua ad alta velocità sulle terre
… tecnologia dei getti d’acqua ad alta velocità (water jet) consente di concentrare una grande energia su una superficie estremamente ridotta. Attualmente la ricerca si rivolge allo studio di nuove possibilità di applicazione fra le quali la bonifica dei terreni contaminati. In questo lavoro …
-
Biolithography : selective joining using antibody-antigen reactions
… substrate was first demonstrated with a 90°C water jet and improved using an argon ion laser which produced line widths on the order of tens of microns. Selective definition of geometry was an extension of the coating process precipitating not one but two bead layers and linking beads using …
-
Hydrodemolition for concrete removal in bridge rehabilitation
Hydrodemolition is the use of a high pressure water-jet to remove concrete. It is a new method of concrete removal which is becoming increasing specified by state Departments of Transportation for bridge rehabilitation work. The technical, financial and contractual aspects of using hydrodemolition …
-
The design and development of aquatic exercise shoe flaps
… bottom of a shoe worn while exercising in the water was designed, developed, and prototyped. The structure freely bends downward so as to provide little resistance when the foot is raised, but is resistant to bending upward when the foot is pressed down, thereby increasing resistance and …
-
Design and dynamic modeling of an unmanned underwater vehicle for submerged surface inspection exploiting hydrodynamic ground effect
… motivates a deeper understanding of underwater navigation in proximity to a submerged target surface. Common examples range from water tanks in nuclear reactors, submerged oil rig infrastructure, to ship hulls with hidden compartments and threats. We propose EVIE (Ellipsoidal Vehicle for …
-
A Potential Flow Model of a Fire Sprinkler Head
… outlined forgoes traditional CFD to solve for water jet-deflector interactions, and instead describes the sheet formation as a potential flow boundary value problem, utilizing a free surface formulation and the superposition of the Green's function. The resulting model allows for the …
-
Design, fabrication, and testing of a three-dimensional monolithic compliant six-axis nanopositioner
… to be fabricated on the non-precision, abrasive water-jet and to be formed using bending processes. The fabrication process was successful. The entire machining process was on the order of one hour. The forming process was repeated multiple times without failure of the mechanism in all cases. The …
Page 1 of 3