Literatura académica sobre el tema "Air ducts Ventilation. Air flow"

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Artículos de revistas sobre el tema "Air ducts Ventilation. Air flow"

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Huo, Fei Yang, Jia Hui Sun, Wei Li Li, and Yi Huang Zhang. "Influence of Large Turbo-Generator Stator Ventilation Ducts Structural Changes on Stator Temperature." Advanced Materials Research 462 (February 2012): 318–26. http://dx.doi.org/10.4028/www.scientific.net/amr.462.318.

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For the complex status of fluid flow in stator radial ventilation ducts of large turbo-generator, the temperature distribution of stator is dramatically affected by the flow status of cooling medium in stator ventilating ducts. In this paper, a new ventilating ducts structure in stator is investigated. According to fixing a wind deflector on the stator teeth adjacent to the ventilation ducts, the fluid flow status of cooling air is changed flowing in stator ventilation ducts. For this reason, the effect of heat transfer in stator is changed. Taking an air-cooled turbo-generator as an example,
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Gaczoł, Tomasz. "Natural balanced ventilation. Simulations part 2." E3S Web of Conferences 49 (2018): 00026. http://dx.doi.org/10.1051/e3sconf/20184900026.

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The paper is devoted to test results of air flow through natural ventilation supply-exhaust ducts in the rooms located on the upper floor of the building that were conducted in ANSYS Fluent software. Three types of solutions were selected for the tests: air inflow into the room through the air intake located at the basement level, air inflow through the window ventilator (although no longer used, this solution can be found in many existing residential buildings) and the natural ventilation system supported with the so-called “solar chimney” that is usually a glass superstructure, located on th
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Gaczoł, Tomasz. "Living quarters. A natural balanced ventilation system. Simulations part 1." E3S Web of Conferences 49 (2018): 00025. http://dx.doi.org/10.1051/e3sconf/20184900025.

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In the following article the author proposes the solution for a properly functioning natural ventilation system based on the use of supply and exhaust ducts, i.e. by designing a natural balanced ventilation system. The paper is devoted to test results of air flow through natural ventilation supply-exhaust ducts in the rooms located on the lower floor of the building. The simulations conducted in ANSYS Fluent software relate to such issues as: pressure system inside the room and in the exhaust duct, distribution of air temperatures in the room, vector direction of airflow through supplyexhaust
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Li, Yong, Weili Li, and Ying Su. "Sensitivity of Axial Velocity at the Air Gap Entrance to Flow Rate Distribution at Stator Radial Ventilation Ducts of Air-Cooled Turbo-Generator with Single-Channel Ventilation." Energies 12, no. 18 (2019): 3442. http://dx.doi.org/10.3390/en12183442.

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In the design and calculation of a 330 MW water-water-air cooling turbo-generator, it was found that the flow direction of the fluid in the local stator radial ventilation duct is opposite to the design direction. In order to study what physical quantities are associated with the formation of this unusual fluid flow phenomenon, in this paper, a 100 MW air-cooled turbo-generator with the same ventilation structure as the abovementioned models is selected as the research object. The distribution law and pressure of the fluid in the stator radial ventilation duct and axial flow velocity at the ai
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Lu, Yi Ping, Qing Hui Pan, Hui Lan Li, and Jia De Han. "Experimental Study of Flow Field of Large Air-Cooled Turbine Generator for Multi-Ventilation Ducts of Stator." Applied Mechanics and Materials 644-650 (September 2014): 377–80. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.377.

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To study rotational air flow field of rotor and complicated flow distinction owing to multi-ventilation ducts of stator in a large air-cooled turbine generator, considering axial symmetry of air supply, an experiment setup of ventilation system of semi-machine configuration was built in this paper. At condition of rotating, ventilation is measured by hot-wire anemometer. Firstly, ventilation in 16 different semi-circle radius is got. Measurement shows that ventilation in different radius varies much. Then ventilation of outlet of stator ducts is measured. The result shows that ventilation whic
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Gaj, Patryk, and Joanna Kopania. "Influence of Geometry of Channel on the Flow Noise Parameters." Mechanics and Mechanical Engineering 22, no. 2 (2020): 541–52. http://dx.doi.org/10.2478/mme-2018-0043.

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AbstractAcoustic emission through duct walls is an important problem in engineering acoustics. This phenomenon most commonly occurs in heating, ventilating and air-conditioning (HVAC) and other gas flow ducting (large industrial silencers). Many works focus on elaboration of more exact description of the acoustic field phenomena reflecting the real conditions in which these appliances operate. As a standard, circle or rectangular ducts are used in ventilation systems. However, technical conditions during the installation of the HVAC system, due to the limitation of the assembly space, require
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Gherghe, Ion, Doru Cioclea, Florin Rădoi, Adrian Matei, and Răzvan Drăgoescu. "Notions regarding the design of suction systems for industrial ventilation." MATEC Web of Conferences 342 (2021): 02006. http://dx.doi.org/10.1051/matecconf/202134202006.

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Air flow in ducts is one of the basic processes of ventilation and air conditioning. Knowledge of this phenomenon and the laws according to it is indispensable for drawing up the sizing calculations of the duct networks, for determining the energy needed to move the air as well as for determining the aerodynamic parameters related to the ventilation ducts. Industrial buildings include large spaces with various sources of releases of harmful substances. Type of these sources and their location depends on the technological process in each section or room.The main role of industrial ventilation s
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Sulin, A. B., A. A. Nikitin, T. V. Ryabova, S. S. Muraveinikov, and I. N. Sankina. "Energy-efficient outdoor air flow control in ventilation systems." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, no. 2 (2021): 18–24. http://dx.doi.org/10.25206/2588-0373-2021-5-2-18-24.

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A method for controlling the ventilation system flow characteristics is considered based on the forming principle an air temperature and carbon dioxide concentration predicted estimate in a room based on the changes dynamics analysis in these parameters in the supply and exhaust ducts. The expected microclimate parameters predicted assessment in real time opens up the possibility of using such elements and algorithms for controlling the ventilation and air conditioning system, which provide the required air quality with minimal energy consumption. The analysis calculates the finding probabilit
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Renz, Andreas, Julian Praß, Johannes Weber, and Stefan Becker. "Experimental Investigation of a Friction Ventilator." Advanced Engineering Forum 19 (October 2016): 43–49. http://dx.doi.org/10.4028/www.scientific.net/aef.19.43.

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Standard decentralized ventilation systems typically consist of two ventilators for inlet and exhaust air and a heat exchanger for the heat recovery. A recently developed device, a so called friction ventilator, combines these three elements into a single functional element. The ventilator consists of circular plates which are rotating centrally in between the inlet and the outlet duct of a ventilation system and generate a countercurrent flow in the two ducts. Furthermore, the discs act as a rotating heat exchanger between the two air flows. To increase understanding of the energy transfer fr
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El Moueddeb, K., S. Barrington, and N. Barthakur. "Perforated Ventilation Ducts: Part 1, A Model for Air Flow Distribution." Journal of Agricultural Engineering Research 68, no. 1 (1997): 21–27. http://dx.doi.org/10.1006/jaer.1997.0176.

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Tesis sobre el tema "Air ducts Ventilation. Air flow"

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MacKinnon, Ian R. (Ian Roderick) 1964. "Air distribution from ventilation ducts." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59655.

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A wooden, perforated, uniform cross-section duct was examined to determine the optimum levels of aperture ratio and fan speed with respect to uniformity of discharge. The optimum aperture ratio for the 8.54 m long duct was 1.0 with a uniformity coefficient of 90.28%. The fan speed had little effect on the uniformity of discharge. The friction factor was experimentally determined to be 0.048 for a non-perforated duct and this value was assumed to be the same for a perforated duct of similar construction. A kinetic energy correction factor was used to analyze the flow in the duct. Values for thi
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Kinsman, Roger Gordon. "Outlet discharge coefficients of ventilation ducts." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59271.

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Discharge coefficients are an important parameter in the prediction of the air displacement performance of ventilation outlets and in the design of ventilation ducts.<br>Discharge coefficients of a wooden ventilation duct 8.54 metres in length and of a constant 0.17 m$ sp2$ cross sectional area were measured. Four different outlet shapes and 3 aperture ratios of each shape were tested. A split plot experimental design was used to evaluate the effect of outlet shape, outlet size, and distance from the fan on discharge coefficient. The relationship between duct performance characteristics and di
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Balasubramanian, Vivek. "Effectiveness of the "common" method in balancing exhaust ventilation systems." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4354.

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Thesis (M.S.)--West Virginia University, 2005.<br>Title from document title page. Document formatted into pages; contains vii, 59 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 48-49).
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El, Moueddeb Khaled. "Principles of energy and momentum conservation to analyze and model air flow for perforated ventilation ducts." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=42024.

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A theoretical model was developed to predict the air distribution pattern and thus to design perforated ventilation ducts equipped with a fan. The analysis of the air distribution pattern of such systems requires accurate measurement procedures. Several experimental methods were tested and compared. Accordingly, the piezometric flush taps and thermo-anemometer were selected to measure respectively the duct air pressure and the outlet air flow.<br>Based on the equations of energy and momentum conservation, a model was formulated to predict the air flow performance of perforated ventilation duct
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Fu, Yan. "Modelling of ducted ventilation system in agricultural structures." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60519.

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Air distribution ducts are used in the environmental control of livestock and poultry building as well as the conditioning of most agricultural produce.<br>In order to simplify the approach to the design of ventilation ducts, a mathematical equation has been derived to describe the average air velocity of a duct.<br>The primary objective of the research work was to test goodness of fit of an equation describing the average air velocity of perforated ventilation ducts, under balanced as well as unbalanced air distribution: $V = H sb{o}{X over L} + (V sb{L}-H sb{o}) {X sp2 over L sp2}$.<br>This
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El, Moueddeb Khaled. "Principles of energy and momentum conservation to analyze and model air flow for perforated ventilation ducts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ29929.pdf.

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Khaire, Swapnil S. "Influence of test section entrance conditions on straight flat oval apparent relative roughness a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=0&did=2000385011&SrchMode=1&sid=1&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1277822700&clientId=28564.

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Besarla, Dhaman Kumar. "Modeling and optimization of air flow in a cabin air filtration test duct a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2008. http://proquest.umi.com/pqdweb?index=0&did=1679682361&SrchMode=1&sid=2&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1254155722&clientId=28564.

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Sanchez, Marc. "Etude des extracteurs d'air hybrides éoliens : conception de géométries et analyse des écoulements." Thesis, Perpignan, 2015. http://www.theses.fr/2015PERP0040/document.

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Ce travail de thèse concerne l'étude d'extracteurs d'air hybrides éoliens. Il se décompose en des investigations amont et appliquées. Dans la partie amont, des simulations fines ont été effectuées en conduite carrée avec et sans rotation, pour des nombres de Reynolds turbulents de l'ordre de 600, afin d'analyser l'impact de la rotation sur la turbulence. Elles ont montré que la rotation rompt la symétrie de l'écoulement. La partie appliquée est dédiée à la conception d'une nouvelle géométrie d'extracteur d'air. Cette géométrie a été proposée à partir de l'analyse de simulations RANS. Ses perfo
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Trinder, M. C. J. "Active noise control in finite length ducts." Thesis, University of Essex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371924.

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Libros sobre el tema "Air ducts Ventilation. Air flow"

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Lynn, Wray H., ed. Airflow in ducts. LAMA Books, 1996.

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Gladstone, John. Moving air through fans and ducts. Engineer's Press, 1992.

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Haskell, Ted. Improved air distribution systems for forced-air heating. Bonneville Power Administration, 1995.

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Wallis, R. Allan. Axial flow fans and ducts. Krieger Pub. Co., 1993.

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International, ORTECH. Study of residential ventilation duct energy losses. Efficiency and Alternative Energy Technology Branch/CANMET, Energy, Mines and Resources Canada, 1992.

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International, ORTECH. Study of residential ventilation duct energy losses. Energy Efficiency Division, Energy Technology Branch/CANMET, 1993.

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Etheridge, David. Building ventilation: Theory and measurement. John Wiley & Sons, 1996.

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Perzak, F. J. Fire tests of rigid plastic ventilation ducts. U.S. Dept. of the Interior, Bureau of Mines, 1987.

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L, Felker Travis, ed. Dampers and airflow control. American Society of Heating, Refrigerating, and Air-Conditioning Engineers, 2009.

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Finkelstein, Hal. Variable air volume system operation: A guide to engineering design and operations. National Resource Center, 1998.

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Capítulos de libros sobre el tema "Air ducts Ventilation. Air flow"

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Akiyama, M., H. Sugiyama, N. Ninomiya, and A. Leoni-Schmid. "Numerical Analysis and Visualization of Air Ventilation Systems." In Flow Visualization VI. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_80.

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Yildirim, Kemal-Edip, Matthias Finkenrath, Mehmet Gökoglu, and Frank Seidel. "Monitoring the Fresh-Air Flow Rate for Energy-Efficient Bus Ventilation." In Energy and Thermal Management, Air Conditioning, Waste Heat Recovery. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47196-9_12.

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Sofu, Tanju, Fon-Chieh Chang, Ron Dupree, Srinivas Malipeddi, Sudhindra Uppuluri, and Steven Shapiro. "Measurement and Analysis of Underhood Ventilation Air Flow and Temperatures for an Off-Road Machine." In The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44419-0_34.

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Crooke, P. S., A. M. Kaynar, and J. R. Hotchkiss. "A Mathematical Model of Air-Flow Induced Regional Over-Distention during Mechanical Ventilation: Comparing Pressure-Controlled and Volume-Controlled Modes." In Advances in the Theory of Control, Signals and Systems with Physical Modeling. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16135-3_22.

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"ventilation air flow." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_220329.

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Cory, WTW (Bill). "Air and gas flow." In Fans and Ventilation. Elsevier, 2005. http://dx.doi.org/10.1016/b978-008044626-4/50005-x.

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Thakur, Pramod. "Air Flow in Mine Airways." In Advanced Mine Ventilation. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-08-100457-9.00002-x.

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"Aerodynamics of Dust Airflows in the Spectra of Air Exhaust Ducts." In Local Exhaust Ventilation. CRC Press, 2015. http://dx.doi.org/10.1201/b18488-2.

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"Aerodynamic Properties of Particles in the Gravitational Flow of a Chuted Bulk Material." In Industrial Air Quality and Ventilation. CRC Press, 2014. http://dx.doi.org/10.1201/b16549-4.

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"Appendix 9: Fume and dust control, air ventilation hose and ducts." In Humidification and Ventilation Management in Textile Industry. Elsevier, 2009. http://dx.doi.org/10.1533/9780857092847.424.

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Actas de conferencias sobre el tema "Air ducts Ventilation. Air flow"

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Toriyama, H., and Y. Asako. "Effect of a Permanent Magnet on CHS (Compost Heating System)." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12350.

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Effect of a permanent magnet on ventilation of an air duct through compost have been investigated numerically. Some compost yield heat over 60 Celsius in fermentation process. That exothermic reaction produces a considerable amount of heat, which could be a potential heating source. Fermentation reaction requires ventilation, abundant supply of paramagnetic oxygen gas and exhaust of metabolized diamagnetic carbon dioxide gas. Continuous and forced air supply is more efficient rather than the conventional manual turn or stirring as ventilation means. In magneto-fluid-dynamics, the magnetizing f
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Scanlon, T., P. Wilson, G. Priestman, and J. Tippetts. "Development of a Novel Flow Control Device for Limiting the Efflux of Air Through a Failed Pipe." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59662.

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The secondary air-systems of a gas turbine engine frequently incorporate pipes and ducts to transport air for duties such as cooling and sealing of the turbine components, pressurisation of the aircraft cabin and component de-icing. The engine must be capable of operating safely in the event of failure of a pipe or duct. The ducts typically pass through the low pressure ventilation zones outboard of the core engine and failure will result in a large mass flow of relatively high temperature air escaping from the secondary air system; the design of the engine must accommodate this potential esca
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Alizadeh, Sohail, and Barrie Moss. "Modelling Sub-Grid Scale Features in Congested Engine Ventilation Zones." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90461.

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In the increasingly congested accessory zones of gas turbine engine casings, it is important that the several temperature-sensitive components, like the electronic engine control unit (EEC), are bathed in an appropriate ventilation environment. Additionally it must be ensured that heat sources, like the geometrically complex gear box components, furthest from the inflows do not sit in stagnant zones. In this paper CFD methods have been used to study in detail the ventilation and heat transfer environment of one particular zone — that of the fan casing in the engine nacelle of a high by-pass tu
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Parayil, Paulson, Somnath Sen, Anit Sen, and Arunkumar Goel. "Iterative Study to Improve Air Flow Distribution on Ventilation Unit Duct Using CFD Analysis." In Thermal Management Systems Conference 2020. SAE International, 2020. http://dx.doi.org/10.4271/2020-28-0030.

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Maqsood, Asim, and A. M. Birk. "Effect of a Bend on the Performance of an Oblong Ejector." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27851.

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This paper presents the results of an experimental study on the performance of oblong ejectors with a bend in the mixing tube. In the aerospace industry, space limitations can lead to the design of exhaust ducts of oblong cross section. These ducts can also include ejectors for engine space ventilation or exhaust cooling or infrared signature suppression. In some cases these systems require bends after the primary driving nozzle. Each ejector consisted of a nozzle and a constant area mixing tube. A series of bent mixing tubes with the same radius of curvature was tested and the results were co
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Nakielska, Magdalena, and Krzysztof Pawłowski. "Enhancement of Gravity Ventilation in Buildings." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.269.

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Nowadays, people are looking for solutions related to ventilation, cooling or heat demand systems, which would be energy efficient and, at the same time, would not cause the degradation of the surrounding environment. As far as ventilation is concerned, an good solution is a natural ventilation, which improves thermal comfort rooms without increasing the consumption of electrical energy in the building. In order to improve the mode of action of the natural ventilation in the building, one can mount various elements supporting the air flow. One of them is a solar chimney. In order to check the
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Chen, Qi, and A. M. Birk. "Experimental Study of an Exhaust Ejector With Entraining Diffuser." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68654.

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Air-air ejectors are used in a wide range of industrial applications. In gas turbine installations, ejectors are typically used for entraining ventilation air or cooling of exhaust ducting. In some gas turbine applications, the exhaust system must be cooled to limit temperatures inside the structure or to manage heat signatures. The ducts are usually cooled by ejectors with film or effusion cooled diffusers. Entraining diffusers typically have poor pressure recovery and as a result, the ejector performance is affected. This paper presents experimental results on the performance of an air-air e
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Fumizawa, Motoo, and Hidenori Horiuchi. "Helium-Air Exchange Flow Rate Measurement Through a Small Opening." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37008.

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Buoyancy-driven counter flows of helium-air were investigated through horizontal and inclined small openings. Counter flows may occur following a window opening as ventilation, fire in the room as well as a pipe rupture accident in a high temperature gas-cooled nuclear reactor [1]. The counter flows also occur following the fusion reactor accident of LOVA that takes place through the breaches of vacuum vessel penetration duct [2]. The experiment has carried out by a test chamber filled with helium and flow was visualized by the smoke wire method. The flow behavior has recorded by a high-speed
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Hassan, Nik Normunira Mat, A. M. Leman, Muhammad Alif Mohamed Noor Zafarullah, et al. "Characterization of flow rate and heat loss in heating, ventilation and air conditioning (HVAC) duct system for office building." In PROCEEDINGS OF GREEN DESIGN AND MANUFACTURE 2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0044697.

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Neale, J., S. S. Leong, T. Barber, K. Byrne, and E. Leonardi. "Noise Treatment Strategies for High Velocity HVAC Ducts in Ocean Going Fast Ferries." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61403.

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This paper describes a study of strategies used to limit the flow generated noise encountered in the outlet diffusers of high velocity heating, ventilation and air conditioning (HVAC) duct systems. A circular jet of air was expanded using a 7° conical diffuser with a variety of outlet configurations and pipe lengths. Sound pressures were recorded for a jet diameter of 50 mm and a jet velocity of 15–60 ms−1 using a dual room reverberation suite. The design of the diffuser outlet was found to have a pronounced effect on the noise spectrum radiating from the duct outlet. The length and shape of t
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Informes sobre el tema "Air ducts Ventilation. Air flow"

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Goolsby, G. K. Position paper -- Tank ventilation system design air flow rates. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/10117825.

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