Academic literature on the topic 'Matrix cooling'

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Journal articles on the topic "Matrix cooling"

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Yang, Haiwei, Xue Liu, Yuyang Bian, and Ge Wang. "Numerical Investigation on the Mechanism of Transpiration Cooling for Porous Struts Based on Local Thermal Non-Equilibrium Model." Energies 15, no. 6 (2022): 2091. http://dx.doi.org/10.3390/en15062091.

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Struts as an important structure in the combustion chamber of hypersonic flight vehicles to inject fuel into main flow face a severe thermal environment. Transpiration cooling is considered as a potential method to provide a thermal protection for struts. This paper presents a numerical investigation on transpiration cooling for a strut based on Darcy–Forchheimer model and the local thermal non-equilibrium model and analyzes the mechanism of transpiration cooling. A coolant film and a velocity boundary layer are formed on the strut surface and the shock wave is pushed away from the strut, whic
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Sokolovs, Alvis, and Ilya Galkin. "Matrix Converter Bi-directional Switch Power Loss and Cooling Condition Estimation for Integrated Drives." Scientific Journal of Riga Technical University. Power and Electrical Engineering 27, no. 1 (2010): 138–41. http://dx.doi.org/10.2478/v10144-010-0036-9.

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Matrix Converter Bi-directional Switch Power Loss and Cooling Condition Estimation for Integrated DrivesIn this paper power loss estimation of bi-directional switch of matrix converter is done by means of calculation and experiments. For safe operation of power devices an efficient cooling system of specific device must be designed. This work is part of a greater project of integrated matrix converter AC drives and the cooling problem here is viewed in context of this task. It is necessary to develop a compact power board and cooling system to extract excessive heat from power devices.
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Barnes, Stuart, and Ian R. Pashby. "Through-Tool Coolant Drilling of Aluminum/SiC Metal Matrix Composite1." Journal of Engineering Materials and Technology 122, no. 4 (2000): 384–88. http://dx.doi.org/10.1115/1.1288925.

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Through-tool coolant was applied to the drilling of an aluminum/SiC MMC. Titanium nitride coated, solid carbide drills were used to investigate the effect of the coolant application method on the performance of the drilling operation. Holes were produced dry, with conventional coolant and with through-the tool coolant. The results provided strong evidence that the conventional application of coolant was having no beneficial effect on the cutting operation compared to dry drilling. However, through-tool cooling gave a significant improvement in performance in terms of tool wear, cutting forces,
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Yu, Zhi Chen, Zhen Li Mi, Qing Wu Cai, Jin Guo, and Na Gong. "Effect of Final Rapid Cooling Temperature on Ultra-Fine Carbides of Ti-Mo Ferrite Matrix Microalloyed Steel." Materials Science Forum 926 (July 2018): 3–10. http://dx.doi.org/10.4028/www.scientific.net/msf.926.3.

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The size and distribution of nanoscale precipitate particles in Ti-Mo ferrite matrix microalloyed steel under three different final rapid cooling temperatures were studied by scanning electron microscopy(SEM), transmission electron microscope(TEM) and microhardness test. The results show that the interphase precipitation could be weakened by the excessive final rapid cooling temperature. A higher supersaturated solid solubility and high-density dislocation in ferrite matrix can be obtained under a relatively lower final rapid cooling temperature, which makes it easier to precipitate in ferrite
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Omrani, E., Ali Shokuhfar, A. Etaati, A. Dorri M., and A. Saatian. "The Effects of Homogenization Time and Cooling Environment on Microstructure and Transformation Temperatures of Ni-42.5wt%Ti-7.5wt%Cu Alloy." Defect and Diffusion Forum 297-301 (April 2010): 344–50. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.344.

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The present paper deals with different effects of homogenization time and cooling environment on Ni-42.5wt%Ti-7.5wt%Cu alloy. The alloy was prepared by vacuum arc melting. Afterwards, three homogenization times (half, one and two hour) and three cooling environments (water, air and furnace) at 1373 K were selected. Optical and Scanning Electron Microscopic methods, EDX, DSC and hardness tests have been used to evaluate the microstructure, transformation temperatures and hardness. Results indicate that specimens that were cooled in air are super-saturated. Also, the microstructure from furnace
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Song, Wenjun, Min Lei, Mingpan Wan, and Chaowen Huang. "Continuous Cooling Transformation Behaviour and Bainite Transformation Kinetics of 23CrNi3Mo Carburised Steel." Metals 11, no. 1 (2020): 48. http://dx.doi.org/10.3390/met11010048.

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In this study, the phase transformation behaviour of the carburised layer and the matrix of 23CrNi3Mo steel was comparatively investigated by constructing continuous cooling transformation (CCT) diagram, determining the volume fraction of retained austenite (RA) and plotting dilatometric curves. The results indicated that Austenite formation start temperature (Ac1) and Austenite formation finish temperature (Ac3) of the carburised layer decreased compared to the matrix, and the critical cooling rate (0.05 °C/s) of martensite transformation is significantly lower than that (0.8 °C/s) of the mat
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Diao, Xiao Gang, Zhi Liang Ning, Fu Yang Cao, Shan Zhi Ren, and Jian Fei Sun. "Microstructure Evolution of Heavy Section Ductile Iron." Advanced Materials Research 97-101 (March 2010): 1020–23. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1020.

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Ductile iron, Heavy section, Cooling curve, Microstructure, Cooling rate. Abstract. Two 250×250×250 mm cubic ductile iron castings solidified in sand and insulation mould were fabricated. The effect of cooling rate on graphite and matrix microstructure of heavy section ductile iron together with their cooling curves were evaluated. Results show that increasing the cooling rate leads to fine graphitization and favors spheroidal graphite formation. The matrix structure is fully ferrite structure at the edge of both castings, while pearlite can be seen near the eutectic cell boundaries at the cen
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Wu, Xingwei, Niudong Li, and Feng Li. "Heat Transfer and Pressure Loss Simulations of Matrix Cooling Channels for Gas Turbine Airfoils." Journal of Physics: Conference Series 2185, no. 1 (2022): 012003. http://dx.doi.org/10.1088/1742-6596/2185/1/012003.

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Abstract The paper selected 10 geometrical parameter combinations to numerically investigate the dependencies of heat transfer enhancement, flow resistances and overall thermal performance on three geometrical factors including rib inclination angle, channel blockage ratio and subchannel number. The investigated Reynolds number starts at 5,000 and can be as high as 90,000. The turbulence model selected was Transition SST model. The results show that the matrix cooling channels of 30deg rib angle have greater heat transfer enhancement and much higher pressure loss than that of 60deg rib angle.
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Nirmalan, N. V., and L. D. Hylton. "An Experimental Study of Turbine Vane Heat Transfer With Leading Edge and Downstream Film Cooling." Journal of Turbomachinery 112, no. 3 (1990): 477–87. http://dx.doi.org/10.1115/1.2927683.

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This paper presents the effects of downstream film cooling, with and without leading edge showerhead film cooling, on turbine vane external heat transfer. Steady-state experimental measurements were made in a three-vane, linear, two-dimensional cascade. The principal independent parameters—Mach number, Reynolds number, turbulence, wall-to-gas temperature ratio, coolant-to-gas temperature ratio, and coolant-to-gas pressure ratio—were maintained over ranges consistent with actual engine conditions. The test matrix was structured to provide an assessment of the independent influence of parameters
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Zhou, Chuwei, Wei Yang, and Daining Fang. "Damage of Short-Fiber-Reinforced Metal Matrix Composites Considering Cooling and Thermal Cycling." Journal of Engineering Materials and Technology 122, no. 2 (1999): 203–8. http://dx.doi.org/10.1115/1.482788.

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Mechanical properties and damage evolution of short-fiber-reinforced metal matrix composites (MMC) are studied under a micromechanics model accounting for the history of cooling and thermal cycling. A cohesive interface is formulated in conjunction with the Gurson-Tvergaard matrix damage model. Attention is focused on the residual stresses and damages by the thermal mismatch. Substantial stress drop in the uniaxial tensile response is found for a computational cell that experienced a cooling process. The stress drop is caused by debonding along the fiber ends. Subsequent thermal cycling lowers
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Dissertations / Theses on the topic "Matrix cooling"

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Fletcher, Daniel Alden. "Internal cooling of turbine blades : the matrix cooling method." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360259.

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Majundar, Pradip. "Analysis of desiccant cooling systems using advanced desiccant matrix structure." access full-text online access from Digital Dissertation Consortium, 1986. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?8707884.

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Lulay, Kenneth Edward. "The effects of cooling on the flow strength of metal matrix composites /." Thesis, Connect to this title online; UW restricted, 1990. http://hdl.handle.net/1773/7037.

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Sundberg, Jenny. "Heat Transfer Correlations for Gas Turbine Cooling." Thesis, Linköping University, Department of Mechanical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5446.

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<p>A first part of a ”Heat Transfer Handbook” about correlations for internal cooling of gas turbine vanes and blades has been created. The work is based on the cooling of vanes and blades 1 and 2 on different Siemens Gas Turbines. The cooling methods increase the heat transfer in the cooling channels by increasing the heat transfer coefficient and/or increasing the heat transfer surface area. The penalty paid for the increased heat transfer is higher pressure losses.</p><p>Three cooling methods, called rib turbulated cooling, matrix cooling and impingement cooling were investigated. Rib turbu
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Maletzke, Fabian. "Investigation Of The Influence Of Geometrical Parameters On Heat Transfer In Matrix Cooling : A Computational Fluid Dynamics Approach." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177185.

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Modern gas turbine blades and vanes are operated at temperatures above their material’s melting point. Active external and internal cooling are therefore necessary to reach acceptable lifetimes. One possible internal cooling method is called matrix cooling, where a matrix of intersecting cooling air channels is integrated into a blade or vane. To further increase the efficiency of gas turbines, the amount of cooling air must be reduced. Therefore it is necessary that heat transfer inside a cooling matrix is well understood. In the first part of the thesis, a methodology for estimating heat tra
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Baker, Victoria Isabelle. "3D Commutation-Loop Design Methodology for a SiC Based Matrix Converter run in Step-up mode with PCB Aluminum Nitride Cooling Inlay." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/104361.

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This work investigates three-dimensional power loop layout for application to a SiC based matrix converter, providing a symmetric, low-inductance solution. The thesis presents various layout types to achieve this design target, and details the implementation of a hybrid layout to the matrix converter phase-leg. This layout is more easily achievable with a surface-mount device package, which also offers benefits such as ease in manufacturing, and a compact package. In order to implement a surface-mount device, a PCB thermal management strategy should be utilized. An evaluation of these methods
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Prokš, Jiří. "Zákaznicky upravitelný modul zadní skupinové svítilny s HD rozlišením." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318409.

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This thesis deals with the design of LED matrix array contains 150 LEDs. In the first part, the thesis identifies source of light like OLED and LED and provide an overview of their lifetime, reliability and basic principle of design systems with LEDs. The thesis then describe design of LED matrix array, deals with power supply of this LED array and with cooling of LED. Finally the thesis describes a software for contol of LED matrix array.
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Russo, Florence. "Matériaux multicaloriques : Application à de nouveaux systèmes de refroidissement." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0097/document.

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Le domaine du refroidissement est en constante expansion, le système actuel est basé sur la compression/décompression des fluides. Face aux problèmes environnementaux et économiques que ce système présente (natures des fluides frigorigènes et leurs recyclages, nuisances sonores et vibratoires, réglementations contraignantes), de nouvelles solutions techniques alternatives émergent. Ainsi ce travail de thèse porte sur de nouveaux systèmes de refroidissement basés sur les effets électrocalorique et magnétocalorique, respectivement présents dans des films minces de polymère fluoré et dans des com
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Scheffler, Tim Niclas. "Kollisionskühlung in elektrisch geladener granularer Materie - Collisional cooling in electrical charged granular media." Gerhard-Mercator-Universitaet Duisburg, 2001. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-05222001-111655/.

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Particles in granular systems collide inelasticly and kinetic energy is dissipated in the granular system. Granular temperature measures the unordered relative motion of the particles. As a result of the inelastic collisions granular temperature decreases, this process is called collisional cooling. In most cases granular particles are charged. This thesis studies the influence of electrical charges on the collisional cooling by using computer simulations and kinetic theory. It is shown, that electrical charge modifies the dissipation rate by a Boltzmann-factor. The energy barrier of the Boltz
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PEREGO, ELIA. "A novel setup for trapping and cooling Barium ions for atom-ion experiments." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2754716.

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Book chapters on the topic "Matrix cooling"

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König, Valentina, Michael Rom, and Siegfried Müller. "A Coupled Two-Domain Approach for Transpiration Cooling." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_2.

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Abstract Transpiration cooling is an innovative cooling concept where a coolant is injected through a porous ceramic matrix composite (CMC) material into a hot gas flow. This setting is modeled by a two-domain approach coupling two models for the hot gas domain and the porous medium to each other by coupling conditions imposed at the interface. For this purpose, appropriate coupling conditions, in particular accounting for local mass injection, are developed. To verify the feasibility of the two-domain approach numerical simulations in 3D are performed for two different application scenarios:
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Peichl, Jonas, Andreas Schwab, Markus Selzer, Hannah Böhrk, and Jens von Wolfersdorf. "Innovative Cooling for Rocket Combustion Chambers." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_3.

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Abstract Transpiration cooling in combination with permeable ceramic-matrix composite materials is an innovative cooling method for rocket engine combustion chambers, while providing high cooling efficiency as well as enhancing engine life time as demanded for future space transportation systems. In order to develop methods and tools for designing transpiration cooled systems, fundamental experimental investigations were performed. An experimental setup consisting of a serial arrangement of four porous carbon fiber reinforced carbon (C/C) samples is exposed to a hot gas flow. Perfused with col
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Hong, Dan, and Dan Liu. "Research on the Cooling Effect of Environmentally Friendly Semi-flexible Pavement Material." In Novel Technology and Whole-Process Management in Prefabricated Building. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5108-2_47.

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AbstractThe article studies the cooling mechanism of environmentally friendly semi-flexible pavement by studying the cooling by evaporation of water in the mortar to take away the latent heat of the pavement to form a natural and environmentally friendly water retention and cooling effect. Using a large pore matrix asphalt mixture filled with water retention mortar, simulated indoor sunlight irradiation warming to 60 ℃ after artificial sprinkling and natural rainfall test method, recorded the asphalt mixture with different void ratio and different grouting amount of specimens before and after
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Yang, Zhiliang, Bo Wang, Shupei Liu, et al. "Numerical Simulation of Solidification Microstructure with Active Fiber Cooling for Making Fiber-Reinforced Aluminum Matrix Composites." In TMS 2016 145th Annual Meeting & Exhibition. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48254-5_82.

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Yang, Zhiliang, Bo Wang, Shupei Liu, et al. "Numerical Simulation of Solidification Microstructure with Active Fiber Cooling for Making Fiber-Reinforced Aluminum Matrix Composites." In TMS 2016: 145thAnnual Meeting & Exhibition: Supplemental Proceedings. John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274896.ch82.

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Rajendran, Mohan Kumar, Michael Budnitzki, and Meinhard Kuna. "Multi-scale Modeling of Partially Stabilized Zirconia with Applications to TRIP-Matrix Composites." In Austenitic TRIP/TWIP Steels and Steel-Zirconia Composites. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42603-3_21.

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Abstract The understanding of how the microstructure influences the mechanical response is an essential pre-requisite for materials tailored to match specific requirements. The aim of this chapter is to further this understanding in the context of Mg-PSZ-TRIP-steel composites on three different scales using a set of methods ranging from phase-field simulations over micromechanics to continuum constitutive modeling. On the microscale, using a Ginzburg-Landau type phase-field model the effects of cooling- and stress-induced martensitic phase transformation in MgO-PSZ is clearly distinguished. Ad
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Sarcinella, Antonella, José Luís Barroso de Aguiar, Sandra Cunha, and Mariaenrica Frigione. "Novel Sustainable Polymer-Based Phase Change Materials (PCMs) for Mortars Based on Different Binders for the Energy Efficiency of Buildings Located in Different Climatic Regions." In Springer Proceedings in Materials. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-72955-3_61.

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AbstractA possible solution to reduce the consumption of fossil fuel and energy demand to power heating and cooling devices is represented by Phase Change Materials (PCMs). They can absorb, store and release energy according to their physical state that changes with the environmental temperature. In this work, novel eco-sustainable PCMs were developed through the form-stable method. Through this process, it was possible to create composite PCMs consisting of a natural inert matrix (i.e., a very porous stone obtained from processing waste) and an eco-friendly polymer, i.e., Poly-Ethylene Glycol
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Chihab, Yassine. "Thermal Performance Improvement of Hollow Fired Clay Bricks Embedding Phase Change Materials." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_53.

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AbstractThe construction industry in Morocco constitutes a substantial share, surpassing 33%, of the total energy consumption in the country, positioning it as one of the industries with the highest energy intensity. In spite of its considerable impact on energy consumption, the architectural design of buildings in Morocco frequently overlooks essential aspects such as the time lag and decrement factor linked to walls. This work aimed to examine the influence of incorporating phase change materials (PCMs) with three distinct melting temperatures on the dynamic thermal characteristics of bricks
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Wilson, Sánchez Ocaña, Robayo Bryan, Rodriguez Pablo, Pazmiño Intriago Monserrate, and Salazar Jácome Elizabeth. "Analysis of Heat Transfer Between a Coolant Fluid and a Plastic Blowing Matrix Using the ANSYS CFD Tool." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77712-2_27.

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Nemova, Galina. "Density Matrix." In Field Guide to Laser Cooling Methods. SPIE, 2019. http://dx.doi.org/10.1117/3.2538938.ch13.

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Conference papers on the topic "Matrix cooling"

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Osman, Krešimir, Mato Perić, and Trpimir Alajbeg. "Matrix-Based Product Configurator used in Configuration and Change Management in Cooling Plant Design." In 2024 9th International Conference on Smart and Sustainable Technologies (SpliTech). IEEE, 2024. http://dx.doi.org/10.23919/splitech61897.2024.10612499.

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Hansen, G. D., Y. T. Hsu, and D. T. Murray. "The Effect of Soluble Silica on Cooling Water Program Performance." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86400.

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Abstract Silica is present in all cooling water systems; however, its concentration can vary substantially. Soluble silica can be present in an open recirculating system from less than 10 mg/L to in excess of 200 mg/L. The main concerns addressed by the water treatment industry have been in two general areas. These are the addition of soluble silica to cooling water systems as a corrosion inhibitor, and the prevention of soluble and insoluble silica fouling on heat transfer surfaces. However, a definitive report has not been made concerning the effect of naturally-occurring soluble silica on s
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Claes, Walter P., Y. Tony Lin, and Peter S. Zisson. "Computerized Expert Monitoring and Process Control of Cooling Water Systems." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93401.

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Abstract Over the past 25 years, computerized process controllers have become more sophisticated in optimizing production. With increased understanding of the "process" of cooling water chemistry, it is now possible to apply the same computerized techniques to the control of open recirculating cooling water systems. This paper describes an integrated expert system for the monitoring and process control of cooling water systems based on the real-time input of on-line, as well as off-line, data and parameters. This single computer program is capable of gathering and storing water quality and sys
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Borstelmann, Dick. "Active matrix liquid crystal displays for consumer products." In Spectrally Selective Surfaces for Heating and Cooling Applications, edited by Claes-Göran Granqvist. SPIE, 2017. http://dx.doi.org/10.1117/12.2284048.

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Gulick, Paul. "Future trends in active addressing passive matrix displays." In Spectrally Selective Surfaces for Heating and Cooling Applications, edited by Claes-Göran Granqvist. SPIE, 2017. http://dx.doi.org/10.1117/12.2284049.

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Ali, M., O. Zeitoun, H. Al-Ansary, and A. Nuhait. "Air cooling using a matrix of ceramic tubes." In POROUS MEDIA AND ITS APPLICATIONS IN SCIENCE, ENGINEERING, AND INDUSTRY: Fourth International Conference. AIP, 2012. http://dx.doi.org/10.1063/1.4711192.

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Zhou, Xu, Yuxuan Zhang, Tao Li, Rui Han, Ping Dong, and Zijie Yu. "Experimental and Numerical Study on Cooling Characteristic of Modelled Matrix Cooling Channels for Turbine Blades." In GPPS Hong Kong24. GPPS, 2023. http://dx.doi.org/10.33737/gpps23-tc-227.

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The staggered-rib cooling structure is an enhanced heat transfer structure for internal cooling of turbine blades. In this paper, the flow and heat transfer of two modeled matrix channel structures inside a gas turbine blade is investigated experimentally and numerically. The detailed heat transfer distribution on the main surface was obtained experimentally in a wind tunnel using the steady-state liquid crystal technique. Based on the channel inlet hydraulic diameter, the experiments were performed in the Reynolds number range of 15968 to 58549.Then the Nusselt number distributions were obtai
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PASKIN, MARC, PHILLIP ROSS, HUKAM MONGIA, and WALDO ACOSTA. "Composite matrix cooling scheme for small gas turbine combustors." In 26th Joint Propulsion Conference. American Institute of Aeronautics and Astronautics, 1990. http://dx.doi.org/10.2514/6.1990-2158.

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Edelson, Ryan D., and Karen A. Thole. "Impact of Ceramic Matrix Composite Topology on Overall Effectiveness." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82326.

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Abstract Ceramic matrix composites (CMCs) are a material of interest for components in the hot section of gas turbine engines due to their high strength-to-weight ratio and high temperature capabilities. CMCs are a class of material made of macro scale woven ceramic fibers infiltrated with a ceramic matrix making them significantly different than their nickel superalloy counterparts. As CMCs are implemented into gas turbine engines, the effects of the inherent topology of the CMC weave on convective heat transfer must be understood. In this study, film cooling holes were integrated into a repr
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Okumuş, F., and A. Turgut. "Thermal Behavior of Aluminum Metal-Matrix Composite During Cooling Process." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/rsafp-21744.

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Abstract The paper presents a thermal behavior analysis of metal matrix composite lamina and laminates during a cooling process. A long stainless steel fiber reinforced aluminum metal matrix composite lamina and laminate are used for this purpose. Metal matrix composites were manufactured by using modulus under the action of 30 MPa pressure and heating up to 600 °C. The thermal stresses generated during cooling have a profound effect on the distortion and strength of the composite materials. In this study, thermal stresses, residual stresses and effective thermal expansion coefficients as a fu
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