Academic literature on the topic 'Air ducts Air ducts'

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Journal articles on the topic "Air ducts Air ducts"

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Dobrostan, O., S. Novak, and V. Drizhd. "FIRE RESISTANCE OF STEEL AIR DUCTS WITH COMBINED FIRE PROTECTION SYSTEM." Scientific bulletin: Сivil protection and fire safety 1, no. 1 (2020): 52–65. http://dx.doi.org/10.33269/nvcz.2020.1.52-65.

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The results of research of fire resistance of steel air ducts with the combined system of fire protection in the conditions of fire influence according to the standard temperature regime according to DSTU B V.1.1-4 are resulted. Steel air ducts were investigated, in the design of which two fire protection systems were used, in which passive fire protection material material (fiberglass "IPS-T-1000") and reactive fire protection material materials ("Endotherm HT-150" and "Endotherm 250103") were used. The research method is applied, which is based on the provisions of DSTU B V.1.1-16. The essen
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Trninić, Marta, Boško Rašuo, and Mirko Dinulović. "Air duct modification towards outlet pressure drop and vibration level reduction." Tehnika 75, no. 4 (2020): 457–66. http://dx.doi.org/10.5937/tehnika2004457t.

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In this work complete methodology for calculation and analysis of fluid flow in air ducts is presented. In order to minimize outlet pressure drop and to reduce the duct vibrations the plates with airfoil cross sections are added to duct critical zones. It was observed that airfoil stream plates efficiently contribute to outlet pressure drop, duct vibration and noise reduction. Modern methods such as CFD and FEA can be efficiently deployed in numerical treatise of flow and vibration analysis in air ducts.
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Li, Lian, and Zhi Yang Yan. "Central Air-Conditioning Duct Cleaning System Based on SRV1." Applied Mechanics and Materials 130-134 (October 2011): 3916–19. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.3916.

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This paper puts forwards the idea of using SRV1 as the platform and making a whole and integrated central air-conditioning duct cleaning system by combining lighting and cleaning devices with dust cleaning devices which all together could fulfill the task of cleaning the central air-conditioning ducts. With good mobility and extended function and also small in size,SRV1, which can also realize wireless remote control and trunking communication, is available for monitoring and cleaning all parts of the ducts simultaneously and can be applied in the complicated environment of the central air-con
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Yan, Shu Xia, Xi Ping Wu, and Dong Wang. "CFD Analysis of Performance of a Reconstruction Plan of Smoke Control System in Metro Station." Advanced Materials Research 243-249 (May 2011): 801–5. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.801.

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There are plenty of pipes to be arranged in subway station platform. Optimizing the air-conditioning system ducts is especially important because of its large size. Due to the location of stairs and the size of ducts, the platform exhaust ducts of a Shanghai subway station were laid out within the range from the stair to the end of the platform which probably can’t exhaust smoke effectively in fire. In reconstruction plan, air supply ducts and discharge ducts are connected and valves are added. Air supply pipe can be changed into discharge duct by controlling the valves. The smoke extraction p
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Yigit, Cemil. "Effect of Air-Ducted Blade Design on Horizontal Axis Wind Turbine Performance." Energies 13, no. 14 (2020): 3618. http://dx.doi.org/10.3390/en13143618.

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Wind turbines without pitch control are more preferable from economical point of view but aerodynamic stall affects them more and after a critical wind speed local boundary layer separation occurs. Consequently, their power production is relatively low. In this study, air ducts added on the blade and using the airflow from them the kinetic energy of the low-momentum fluid behind the surface was increased and delay of separation of the boundary layer from the surface was examined The Response Surface Optimization method was utilized in order to get the best possible design under the constraints
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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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Jamadar, Soyab A. "A Review on Various Methodologies for AC Duct Cleaning." Journal of Advanced Research in Applied Mechanics and Computational Fluid Dynamics 07, no. 3&4 (2020): 1–5. http://dx.doi.org/10.24321/2349.7661.202003.

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Cleaning of the AC ducts is the need because it creates problems such as the bad indoor air quality which results in health issues and it also causes the large maintenance of the system. The uncleaned air ducts become home for fungi, dust and harmful microbial. The causes and effects of this thing are mentioned following. The AC ducts can be cleaned through various methodologies i.e. conventional and by using robots. In the conventional system, there is manual cleaning by using some equipment. Cleaning the ducts by using robots would be a good solution for this. Different types of robot system
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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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Agafonova, Vera. "Geometric characteristics of micro holes in a fabric air duct." E3S Web of Conferences 164 (2020): 01034. http://dx.doi.org/10.1051/e3sconf/202016401034.

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The purpose of this study is to develop new effective air supply devices, taking into account the current level of development of science and technology and the emergence of modern high-tech materials. These include microperforated fabric ducts made of a polymer composite material. The holes in such ducts are cut with a laser. The results of studying the geometric characteristics of micro holes in a textile air duct section using an optical microscope are presented. It was found that the area of the holes varies in the range from 39629 μm2 to 50955 μm2. The average value of the area of micro h
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Kakoty, Sashindra K., and Vinay K. Roy. "Bulk Reaction Modeling of Sound Propagation Through Circular Dissipative Ducts Backed by an Air Gap." Journal of Vibration and Acoustics 128, no. 6 (2006): 699–704. http://dx.doi.org/10.1115/1.2345669.

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Circular and annular dissipative ducts are extensively used for attenuation of sound in industrial applications. In most of the cases the characteristics of lining material is considered to be locally reacting, although; it may not be true always. This is because there are not many investigations available for bulk reaction modeling of circular and annular ducts. The present paper deals with a generalized formulation of a sound wave with mean and induced flow for bulk reaction approach, which can analyze sound attenuation and phase speed in circular and annular cross-section ducts. In the abse
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Dissertations / Theses on the topic "Air ducts Air ducts"

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Aydın, Çiğdem Özerdem M. Barış. "Air leakage detection in various cross sectioned air ducts and research on manufacturing methods for airtightness/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/makinamuh/T000515.pdf.

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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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Gibbs, Daniel Chad. "Laboratory testing of ducts and fittings to determine pressure loss characteristics a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=30&did=1913184291&SrchMode=1&sid=1&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1265044286&clientId=28564.

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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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McNicol, Ian David. "Active adaptive cancellation of sound in ducts /." Title page, contents and synopsis only, 1985. http://web4.library.adelaide.edu.au/theses/09ENS/09ensm169.pdf.

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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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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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Jangam, Ranjit. "Relationship between damper resistance and damper insertion depth." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4509.

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Thesis (M.S.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains xi, 97 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 62-63).
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Books on the topic "Air ducts Air ducts"

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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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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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Sheet Metal and Air Conditioning Contractors' National Association (U.S.). HVAC duct systems inspection guide. 2nd ed. Sheet Metal and Air Conditioning Contractors' National Association, 2000.

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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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), Sheet Metal and Air Conditioning Contractors National Association (U S. HVAC air duct leakage test manual. The Association, 1985.

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

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Kuzʹmin, M. S. Vyti͡a︡zhnye i vozdukhoraspredelitelʹnye ustroĭstva. Stroĭizdat, 1987.

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Rutkowski, Hank. Commercial low pressure, low velocity duct system design: Theory and applications, duct sizing, and fan selection : manual Q. Air Conditioning Contractors of America, 1990.

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Book chapters on the topic "Air ducts Air ducts"

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Gooch, Jan W. "Air Ducts." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_350.

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Basu, Prabir, Cen Kefa, and Louis Jestin. "Pressure Drop in Gas and Air Ducts." In Mechanical Engineering Series. Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1250-8_16.

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Xiao, Huahua. "Experiments of Premixed Hydrogen–Air Flame Propagation in Ducts." In Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48379-4_2.

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Xiao, Huahua. "Theoretical Analysis of Premixed Hydrogen–Air Flame Propagation in Ducts." In Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48379-4_4.

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Xiao, Huahua. "Numerical Simulations of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts." In Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48379-4_3.

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Xiao, Huahua. "Mechanisms of Flame Deformations in the Premixed Hydrogen–Air Flame Propagation." In Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48379-4_5.

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Qi, Fang Wei, Wang KeJun, Tian Feng, Hu Kai Bo, and Cui Hang. "Structural Design of an ATR Air-Proof Enclosure with Several Independent Heat Dissipation Ducts." In Lecture Notes in Electrical Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9441-7_63.

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Xiao, Huahua. "Background and Introduction." In Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48379-4_1.

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Xiao, Huahua. "Conclusions and Further Work." In Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48379-4_6.

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Somasundaram, Valliammai, and N. Balakrishnan. "Gerlach Shaping Inspired Air Intake Duct Optimization." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5432-2_1.

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Conference papers on the topic "Air ducts Air ducts"

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Taylor, J. V., F. Flanagan, A. Dunlop, S. D. Grimshaw, and R. J. Miller. "Super Aggressive S-Ducts for Air Breathing Rocket Engines." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14927.

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Abstract Air breathing rocket engines require turbomachinery and ducting that is substantially lighter than that used in ground based or aerospace gas turbines. In order to reduce the weight of the axial compressor, the design of the inter-spool swan neck duct is targeted. In this paper a circumferential splitter blade is used to reduce loading and diffusion on the duct endwalls. The splitter and duct geometry are coupled and optimised together using 2D CFD. A design is selected that is 30% shorter than ducts that are currently used in aerospace gas turbines and the 3D flow features are invest
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Ortiz Duen˜as, C., R. J. Miller, H. P. Hodson, and J. P. Longley. "Effect of Length on Compressor Inter-Stage Duct Performance." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27752.

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This paper describes the effect of reducing the length of a plain S-shaped compressor inter-stage duct on its performance. The investigation is aimed at understanding the physical mechanisms that determine the flow within these ducts and to assess the effect of these mechanisms in the overall duct performance. An experimental and computational investigation on the development of the boundary layers and loss generation within a datum duct (100% length) was performed. These results were used to design two S-shaped ducts with 74%, and 64% duct length of those currently used as inter-stage ducts.
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Rader, Charles P., Bruce D. Wilson, Michael W. Bednarik, and Robert E. Lietz. "Elastomeric Alloys in Automotive Clean Air Ducts." In International Congress & Exposition. SAE International, 1990. http://dx.doi.org/10.4271/900577.

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Karakasis, Marios K., Edward M. J. Naylor, Robert J. Miller, and Howard P. Hodson. "The Effect of an Upstream Compressor on a Non-Axisymmetric S-Duct." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23404.

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This paper considers the effect of an upstream compressor stage on a compressor inter-spool duct. The duct geometry must be fixed early in the engine design process, well before the design of the upstream stages. It is therefore important that the designer has a good physical insight into how engine representative inlet conditions affect the limits of the duct design space. An experimental and computational investigation of two strutted inter-spool S-ducts was undertaken. Both were tested with and without an upstream stage present. The first duct is of a conventional axisymmetric design with a
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Lourier, Jean-Michel, Axel Widenhorn, Berthold Noll, Michael Sto¨hr, and Manfred Aigner. "Numerical Analysis of the Acoustic Transfer Behaviour of Pressure Ducts Utilised for Microphone Measurements in Combustion Chambers." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22805.

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Acoustic measurements within combustion chambers are expensive due to high thermal loads applied on the measurement devices at operating conditions. As a more feasible substitute, pressure ducts can be used to lead acoustic waves from combustion chambers to externally mounted microphones. Since these pressure ducts are purged by nitrogen at atmospheric temperature, high thermal loads are avoided. However, the acoustic signal measured within the pressure ducts is altered compared to the signal within the combustion chamber. This change in the acoustic signal can be characterised by means of the
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Farber, Steven, and Wahid Ghaly. "Pressure Loss Modeling of Non-Symmetric Gas Turbine Exhaust Ducts Using CFD." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59856.

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In typical gas turbine applications, combustion gases that are discharged from the turbine are exhausted into the atmosphere in a direction that is sometimes different from that of the inlet. In such cases, the design of efficient exhaust ducts is a challenging task particularly when the exhaust gases are also swirling. A parametric Computational Fluid Dynamics (CFD) based study was carried out on non-symmetric gas turbine exhaust ducts where the effects of geometry and inlet aerodynamic conditions were examined. These exhaust ducts comprise an annular inlet, a flow splitter, an annular to rec
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Axelsson, Lars-Uno, and T. Gunnar Johansson. "Experimental Investigation of the Time-Averaged Flow in an Intermediate Turbine Duct." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50829.

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Intermediate turbine ducts are used in modern multi-spool jet engines to connect the high pressure turbine with the low-pressure turbine. The trend towards turbofan engines with larger by-pass ratios requires the radial off-set between the high-pressure and low-pressure turbines to increase with a corresponding increase in radial off-set for the intermediate turbine ducts. Other improvements of the ducts is to make them shorter and more diffusing but this strive towards more aggressive design increases the risk for separation. This paper deals with an experimental investigation of the time-ave
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Davis, N. C., T. M. Horan, K. Kroehle, and F. G. Forster. "408. Case Studies in Microbiological Contaminated Air Ducts." In AIHce 1998. AIHA, 1999. http://dx.doi.org/10.3320/1.2762816.

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Thomazi, Cleber Caetano, Yuri Castilho Caldeira Brant, Baltazar Agenor Bailona, Hamilton Lelis Ito, and Osvaldo da Silva Neto. "FAILURE ANALYSIS OF ROTARY KILN’S TERTIARY AIR DUCTS." In 72º Congresso Anual da ABM. Editora Blucher, 2017. http://dx.doi.org/10.5151/1516-392x-30663.

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Thoma, Christoph, José David Martinez Cerezo, and Korbinian Kramer. "Temperature Measurement in Air Ducts - An Optimized Method for Solar Air Heaters." In EuroSun 2010. International Solar Energy Society, 2010. http://dx.doi.org/10.18086/eurosun.2010.15.20.

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Reports on the topic "Air ducts Air ducts"

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ANDREWS, J. W. ANALYSIS OF MEASUREMENT UNCERTAINTIES IN THE NULLING TEST FOR AIR LEAKAGE FROM RESIDENTIAL DUCTS. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/783979.

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Andrews, J. W. How to heat and cool a home with 400 CFM supply air and keep the ducts in the conditioned space. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/354896.

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ANDREWS, J. W. HOW TO HEAT AND COOL A HOME WITH 400 CFM SUPPLY AIR AND KEEP THE DUCTS IN THE CONDITIONED SPACE. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/759003.

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Levinson, Ronnen, Delp Wm. Woody, Darryl Dickerhoff, and Mark Modera. Effects of air infiltration on the effective thermal conductivity of internal fiberglass insulation and on the delivery of thermal capacity via ducts. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/764330.

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Burdick, Arlan. Advanced Strategy Guideline. Air Distribution Basics and Duct Design. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1219411.

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Burdick, Arlan. Advanced Strategy Guideline: Air Distribution Basics and Duct Design. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1031397.

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Shapiro, C., R. Aldrich, and L. Arena. Retrofitting Air Conditioning and Duct Systems in Hot, Dry Climates. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1048982.

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Shapiro, Carl, Robb Aldrich, and Lois Arena. Retrofitting Air Conditioning and Duct Systems in Hot, Dry Climates. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1219729.

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Walker, Iain. Sensitivity of forced air distribution system efficiency to climate, duct location, air leakage and insulation. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/792920.

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Hassan, Yassin. Study of Air Ingress Across the Duct During the Accident Conditions. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1097001.

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