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 61 for “"Jet Impingement"”.
-
Jet impingement on porous surfaces
… documenting the flow resulting from the 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) …
-
Flat Plate-Free Jet Impingement Studies
Made available in DSpace on 2014-12-09T18:12:23Z (GMT). No. of bitstreams: 1 6812127.pdf: 2401029 bytes, checksum: cf2a87216bd80e344ceacff1b11b1b0b (MD5) Previous issue date: 1968
-
Numerical Simulations and Studies on Round Jet Impingement, Twin Jet Impingement and Helicopter Rotor Blades Ground Effect
… parts. The first part focused on single round jet impingement. The convention air jet impingement on ground surface was compared to air jet impingement on water surface in the range of Mach number from 0 to 0.3. Currently the studies on round jet impingement on water surface are very few. The …
-
Jet impingement boiling heat transfer at low coiling temperatures
The production of advanced high strength steels (AHSS) for use in the automotive and construction industries requires complex control of runout table (ROT) cooling. Advanced high strength steels require coiling at temperatures below 500 °C in order to produce a complex multi-phase microstructure. …
-
The effect of entrainment on jet impingement heat transfer
… transfer to a single, plane, turbulent impinging jet. Solutions to the momentum and energy equations were obtained with similarity and series analyses. The analytical model is compared with measured heat transfer rates to single air jets impinging normally on an isothermal heated surface. To …
-
An experimental investigation of liquid jet impingement heat transfer theories
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
-
Numerical study of jet impingement cooling on a smooth curve surface
Impinging jets are a best method of achieving particularly high heat transfer coefficient and are therefore employed in many engineering applications. In this study we seek to understand the mechanism of the distributed heat on the curve surface with the goal of identifying preferred methods to …
-
An Investigation of Cooling Configurations in Gas Turbine Engines Using Jet Impingement
… by making a scaled-up model of a section in a jet impingement channel. Different turbulence models were run and the results were compared to experimental data. Experimental comparisons were made for impingement channels between a baseline case, which is a rectangular array of jets of 20 rows …
-
Simulation of hydrodynamics of the jet impingement using Arbitrary Lagrangian Eulerian formulation
… of the fluid becomes necessary. Circular jet due to its high efficiency has been used vastly in the industry. Although some experimental studies of round jet arrays have been done, yet the characteristics of a single jet with industrial geometric and flow parameters on the surface of a …
-
Numerical Modeling of a Turbulent Plane Jet Impingement on a Solid Wall
Turbulent jet flows constitute a common problem for engineers. Owing to self-preservation in nature, a submerged jet has been well solved by the zero-equation turbulence model. However, in practice, the flow field is often confined by side walls or normal walls. Near those solid boundaries, flow …
-
Heat transfer from a spherical surface by jet impingement: an experimental study
… for the removal of heat from a sphere, via jet impingement by single and multiple jets was documented experimentally. Average heat transfer rates from a sphere maintained at constant temperature, by means of an internal electronic heater, and subjected to single or multiple jet impingements …
-
Heat Transfer Analysis of an Oblique Jet Impingement Cooling on CMC Rough Surface
… these effects, an obliquely impinging circular jet on a CMC surface is studied. Both experimental and numerical methods are employed to find the effect of simulated surface features on heat transfer rates. In this study, oblique angles of 45° and 90°, jet to plate distance of 6.5 and 7 jet …
-
CFD simulation of flow fields associated with high speed jet impingement on deflectors
… used to analyze the formation of under-expanded jets and to investigate the three-dimensional flow field associated with the impingement of free jets onto stationary deflectors. This investigation was performed to develop a verified modeling ability for such problems. Predictions were compared …
-
Liquid jet impingement heat transfer and its potential applications at extremely high heat fluxes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
-
Large Eddy Simulation of Supersonic Twin-Jet Impingement Using a Fifth-Order WENO Scheme
… flow field produced by supersonic twin-jet impingement is studied using a large eddy simulation (LES). The numerical model consists of two parallel axisymmetric jets of diameter 𝐷*, 3𝐷* apart, issuing from a plane which is at a distance H*=4𝐷* above the ground. The jet diameter 𝐷*, mean …
-
A Numerical Study of Supersonic Rectangular Jet Impingement and Applications to Cold Spray Technology
Particle-laden supersonic jets impinging on a flat surface are of interest to cold gas-dynamic spray technology. Solid particles are propelled to a high velocity through a convergent-divergent nozzle, and upon impact on a substrate surface, they undergo plastic deformation and adhere to the …
-
Augmentation of Jet Impingement Heat Transfer on a Grooved Surface Under Wet and Dry Conditions
Array jet impingement cooling experiments were performed on flat and grooved surfaces with the surface at a constant temperature. For the flat surface, power and temperature measurements were performed to obtain convection coefficients under a wide range of operating conditions such as jet speed, …
-
Influential cooling of the free surface by jet impingement of aqueous nanodispersion dominant with hybridized nanoparticles
… necessary for the paced livelihood. Amidst them, jet impingement cooling is one of the fast-emerging techniques due to its capability of producing very efficient localised heat transfer. The impinging jet cooling technology has been extensively employed in various industrial systems, such as …
-
Evaluating a multi-jet Impingement air heat exchanger design for PEBB 6000 using Solidworks Flow Simulation
… combines a parallel plate-fin heat sink with air jet impingement onto its fins. Previous studies showed that jet impingement methods can yield heat transfer rates that are three times of those produced by conventional cooling methods, which confines a parallel flow to a surface. In order to …
-
Increasing the Heat Transfer on a Grooved Surface Under Dry and Wet Conditions by Using of Jet Impingement
… hybrid cooling technique is proposed using air jets which impinge on a triangular grooved surface with dry grooves and grooves containing water. One major application is for condensers of thermoelectric power plants. The heat and mass transfer analogy were successfully used to evaluate the …
Page 1 of 4