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Showing 1 to 20 of 23 for “"impingement cooling"”.
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Microjet impingement cooling of high power-density electronics
… the operating temperature, by means of effective cooling, improves both the performance and lifetime of the device. In this work, the high heat transfer capability of microjet impingement was leveraged to bring cooling directly to the backside of the electronic device. Previous experimental …
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Experimental study of impingement cooling in rotating turbine blades
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1983.
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Computational Investigation of Impingement Cooling for Regeneratively Cooled Rocket Nozzles
<p>Jet impingement cooling is an internal cooling configuration used in the thermal management of temperature sensitive systems. With rocket engine combustion temperatures rising as high as 3600 K, it is essential for a cooling method to be applied to ensure that the nozzle integrity can be …
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Numerical study of jet impingement cooling on a smooth curve surface
… results displayed are determine the influence of impingement jet characteristics on thermal and flow field on a curve surface, determine the variation of Nusselt numbers (NuD) along the curve surface in order to understand the heat transfer characteristics and study the effect of position (in the …
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Stagger angle effects on impingement cooling of a rotating turbine blade
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1984.
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Heat Transfer Analysis of an Oblique Jet Impingement Cooling on CMC Rough Surface
… capabilities of these CMC components, convection cooling will still likely be required. The surface of the CMC varies significantly from traditional super-alloy used in a modern engine, with large level of roughness and significant three-dimensional waviness. These complex features will impact the …
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Analysis of a Coupled Micro- and Triple-Impingement Cooling Configuration in the C3X Vane
… These two concepts are optimized near wall cooling passages and a triple-impingement configuration in the vane trailing edge. Finally this study explores a CFD conjugate analysis based on the Shear Stress Transport k(l) turbulence model. The overall goal is to produce a more effective …
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Particle Size, Gas Temperature, and Impingement Cooling Effects on High Pressure Turbine Deposition in Land Based Gas Turbines from Various Synfuels
… 960°C. In the third and fourth test series impingement cooling was applied to the backside of the target button to simulate internal vane cooling. Ground coal and petcoke ash particulates were used for the two tests, respectively. Capture efficiency was reduced with increasing mass flow of …
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Heat Transfer to Arrays of Oscillating Impingement Jets
… will always limit operating temperatures. Impingement cooling jets have become a common way of cooling due to the high rates of heat transfer that can be achieved. However, previous research has shown that the interaction of impingement jets with cylinder wake can improve the intensity and …
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Experimental and Computational Investigation of Thermal-Flow Characteristics of Gas Turbine Reverse-Flow Combustor
… A sheath is typically installed to provide cooling at an expense of large pressure losses, through small jet impingement cooling and strong forced convention channel flow. With the modern advancement in metallurgy and thermal-barrier coating technologies, it may become possible to remove …
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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, …
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Design and optimization of an ultra-compact thermal management system integrated with micro-fins for high power applications
… semiconductors require powerful and compact cooling systems in order to maintain operational capabilities. A key component that requires significant heat extraction (several hundreds of watts up to 1 kW) are silicon photo-conductive semiconductor switches (Si-PCSS). Many methods of thermal …
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Heat Transfer Coefficient and Adiabatic Effectiveness Measurements for an Internal Turbine Vane Cooling Feature
… of key turbine components. Without active cooling schemes, modern turbines would fail catastrophically. This study will evaluate a novel cooling scheme for turbine airfoils, called microcircuit cooling, in which small cooling channels are located extremely close to the surface of a turbine …
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Influential cooling of the free surface by jet impingement of aqueous nanodispersion dominant with hybridized nanoparticles
… 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 cooling …
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Investigation on the Interaction of an Impinging Jet with Cylinder Wakes
<p>Jet impingement cooling is a widely used cooling method due to the high heat transfer rates associated with it. Research for improving heat transfer rates for this cooling is still being carried out due to its broad application in various fields like gas turbine blade cooling, electronic …
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Experimental investigation of overall effectiveness and coolant jet interactions on a fully cooled C3X turbine vane
… jets and the contributions of external film cooling and internal impingement cooling to overall cooling effectiveness. Overall effectiveness was experimentally measured using a thermally scaled, matched Biot number vane model featuring a realistic internal impingement scheme and had …
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Design and Validation of a High-Density 10 kV Silicon Carbide MOSFET Power Module with Reduced Electric Field Strength and Integrated Common-Mode Screen
… is addressed by employing direct-substrate, jet-impingement cooling. The cooler is integrated into the module housing for increased power density.
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Numerical simulation of heat transfers on a circular cylinder by an impinging jet with nanofluid
… studies over the past decades. In terms of cooling surfaces in many engineering applications had been devised to enhance the heat transfer from the jet impingement to the target surface. In this work, a study was conducted to investigate numerically related to the jet impingement on a …
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Heat Transfer and Flow Measurements on a One-Scale Gas Turbine Can Combustor Model
Combustion designers have considered back-side impingement cooling as the solution for modern DLE combustors. The idea is to provide more cooling to the deserved local hot spots and reserve unnecessary coolant air from local cold spots. Therefore, if accurate heat load distribution on the liners …
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Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique
… outward channels with rib turbulators, and jet impingement cooling schemes are studied during rotation. 90deg, W, and M-shaped rib enhancements are studied and detailed heat transfer measurements clearly capture the heat transfer enhancement mechanisms with and without rotation. Jet impingement …
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