Academic literature on the topic 'Manifold assembly'

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Journal articles on the topic "Manifold assembly"

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Martin, Alex, George Dellopoulos, Paul Edwards, Andreas Furmanek, Stefan Gicquel, Brian Macklin, Patrick Martin, Mario Merola, Mark Norman, and Rene Raffray. "ITER blanket manifold system: Integration, assembly and maintenance." Fusion Engineering and Design 89, no. 9-10 (October 2014): 2257–61. http://dx.doi.org/10.1016/j.fusengdes.2014.04.013.

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Bak, A., and Yu V. Muranov. "Normal invariants of manifold pairs and assembly maps." Sbornik: Mathematics 197, no. 6 (June 30, 2006): 791–811. http://dx.doi.org/10.1070/sm2006v197n06abeh003778.

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DeGaspari, John. "Trimming in a Snap." Mechanical Engineering 122, no. 07 (July 1, 2000): 74–76. http://dx.doi.org/10.1115/1.2000-jul-6.

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This article emphasizes on the use of thermoplastics in engines. One case in point is a reinforced nylon multifunctional module involving three components—air intake manifold, cam cover, and design cover-on the Alfa Romeo 156 engine. The project was a collaboration of Rhodia Engineering Plastics of France, Robert Bosch GmbH of Germany, and Magneti Marelli S.p.A. of Italy, system supplier for Fiat, which manufactures the Alfa Romeo. The article also shows an example where an under-the-hood reinforced nylon module on the Alfa Romeo 156 engine saved weight, allowed part integration, and incorporated a snap-fit assembly technique. According to an expert, the nylon also made possible more efficient assembly techniques. The air intake manifold, for example, is assembled using snap-fits, eliminating the need for welding or screw. The part provides high dimensional stability, good heat distortion temperature, and resistance to oils.
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Mohades, Mohamad Mahdi, Sina Majidian, and Mohammad Hossein Kahaei. "Haplotype Assembly Using Manifold Optimization and Error Correction Mechanism." IEEE Signal Processing Letters 26, no. 6 (June 2019): 868–72. http://dx.doi.org/10.1109/lsp.2019.2910383.

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Raptis, George, and Wolfgang Steimle. "Topological manifold bundles and the $A$-theory assembly map." Proceedings of the American Mathematical Society 148, no. 9 (April 22, 2020): 3787–99. http://dx.doi.org/10.1090/proc/15014.

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Tutunea, Dragos, Alexandru Oprica, Ana Maria Nicu, Diana Camelia Staicu, and Ilie Dumitru. "CFD and Structural Analysis of the Intake Manifold Flap of an Internal Combustion Engine." Applied Mechanics and Materials 880 (March 2018): 195–200. http://dx.doi.org/10.4028/www.scientific.net/amm.880.195.

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The objective of this study is to analyze the flow filed in the intake manifold using Computational Fluid Dynamics (CFD). The main function of the intake manifold flap is to regulate the air flow and to uniformly distribute in the cylinders. If the air is distributed uneven to the engine the volumetric efficiency, power and fuel consumption is reduced. The finite element method can be used to optimize the throttle flap. The results in the simulation offer valuable information’s of the flow field in the throttle assembly. The results show that the CFD model can be used as a tool for improve and optimize various part of the intake manifold flap.
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Cardoen, Grégoire, Kurt Breitenkamp, Todd Emrick, and E. Bryan Coughlin. "Manifold Assembly for the Convenient Polymerization of Ethylene Oxide and Butadiene." Macromolecules 39, no. 20 (October 2006): 7170–73. http://dx.doi.org/10.1021/ma061379y.

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Song, Shaotang, Lulu Wang, Jie Su, Zhen Xu, Chia-Hsiu Hsu, Chenqiang Hua, Pin Lyu, et al. "Manifold dynamic non-covalent interactions for steering molecular assembly and cyclization." Chemical Science 12, no. 35 (2021): 11659–67. http://dx.doi.org/10.1039/d1sc03733a.

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Villaret, Vincent, Frederic Deschaux-Beaume, Jean Marie Fortain, Gilles Fras, and Fabien Januard. "Weldability of New Ferritic Stainless Steel for Exhaust Manifold Application." Advanced Materials Research 445 (January 2012): 777–82. http://dx.doi.org/10.4028/www.scientific.net/amr.445.777.

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In the current context of fossil energy scarcity, car manufacturers have to optimize vehicles energy efficiency. This and continuous improvement includes a change of the exhaust manifold design. Usually in cast iron, exhaust manifolds tend to be mechanically welded in order to fit new constraints such as lightness, durability, efficiency and small size. To achieve such requirements, ferritic stainless steels with high chromium content (19%) and molybdenum (2%) are developed. For the welding, the use of existing filler wire does not satisfy fully the application requirements. This leads to oxidation problems and / or thermal fatigue strength that drastically reduces assembly lifetime. New flux cored wires are developed in the context of this study in order to provide molten zone characteristics close to those of the base metal. Different chemical compositions are tested in order to highlight the influence of stabilizing element on microstructure. Welding tests revealed the major influence of titanium on the grain refinement in the molten zone. A minimum Ti content of 0.45 weight % in the filler wire is required to be efficient as grain refiner.
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Jin, Y. W., W. Liu, Yi Yang Zhao, and C. Wang. "The Micro-Patterning of Polymer in the Presence of Porphyrin via Electrospinning." Solid State Phenomena 121-123 (March 2007): 653–56. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.653.

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Functional self-assembled structure with well-defined shapes and dimensions are of great current interest. Porphyrins are attractive building manifold patterning for these structures because of their electronic, optical, and catalytic properties. In this paper, we report a novel technique for the assembly patterning of polymers. An Electrospinning process was used to create patterning with diameter ranging from 3 μm to 4 μm and length of up to several hundred micrometers in the presence of Zinc Porphyrin. Scanning electron microscopy (SEM), UV- visible spectra and EDX spectra were used to characterize the patterning. The results indicated that the patterning depended on the concentration of Porphyrin and the operational conditions.
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Dissertations / Theses on the topic "Manifold assembly"

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Růžička, Lukáš. "Návrh racionalizace montážní linky sestav pro tepelné výměníky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232020.

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The objective of the thesis is rationalization of current process of assembling of manifold assemblies from the reduction of operating costs point of view. The reason for rationalization is uncompetitiveness of actual solution due to high manufacturing cost of manifold assemblies coming from this process. After analysis of current operations, taking into account presumed production plan, the capacitive calculation of assembly line was done. Then alternative solutions were proposed based on above mentioned criterion, and from these the optimal variant was picked and developed. The assessment of resultant solution was done in the end.
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Juriga, Jakub. "Návrh lisovacích přípravků na manifoldové sestavy kondenzátoru automobilové klimatizace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254278.

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The diploma thesis deals with the design of pressing machines for manifold assembly of condensers in the car air-conditioning unit. The problem of the current assembling process is its inefficiency. Semi-automated assembly using pneumatic pressing machines eliminates this problem. In the theoretical part the air-conditioning components, current state of assembly and calculating base of pressing are described. In the practical part the test of pressing force was conducted. Based on this test, the design of four pneumatic pressing machines was accomplished. In the final part of the work, evaluation of the whole project is provided.
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Takata, Doman. "A Loop Group Equivariant Analytic Index Theory for Infinite-dimensional Manifolds." Kyoto University, 2018. http://hdl.handle.net/2433/232217.

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Book chapters on the topic "Manifold assembly"

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Saunders, Gordon, and Tobias Müller. "Application of a Standardized Design Procedure in the Development of Automated Micro-assembly Processes." In IFIP Advances in Information and Communication Technology, 25–35. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72632-4_2.

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AbstractAutomated precision assembly of e.g. optical systems requires development efforts in manifold domains, such as part feeding, handling, alignment, bonding and quality control. The use of systematic design procedure enables the rapid and complete development of new applications and use cases using existing equipment. Combined with modular equipment and subsystems, the use of a standardized design process significantly reduces development time and therefore costs. A generic methodology based on the functional decomposition of assembly task requirements and a coherent synthesis of functional process building blocks can be an answer to reduced process ramp-up time, more stable processes and enable concurrent engineering for novel tool and process development.
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Tsuruyama, Tatsuaki. "Non-Linear Kinetic Analysis of Protein Assembly Based on Center Manifold Theory." In Kinetic Theory. InTech, 2018. http://dx.doi.org/10.5772/intechopen.70750.

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"Fatigue Fracture of Waspaloy Spray-Manifold Assembly Because of Embrittlement by Penetration of Molten Braze Metal." In ASM Failure Analysis Case Histories: Processing Errors and Defects. ASM International, 2019. http://dx.doi.org/10.31399/asm.fach.process.c0047756.

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Erakat, Noura. "The UN Statehood Bid." In Land of Blue Helmets. University of California Press, 2016. http://dx.doi.org/10.1525/california/9780520286931.003.0005.

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This chapter focuses on the United Nations's Palestinian “statehood” bid starting in 2011. In May 2011, the Palestine Liberation Organization (PLO)/Palestinian Authority (PA) announced that it would seek membership as a state within the UN. The UN statehood bid would alter the PLO's status as a nonmember observer entity, conferred upon it by the UN General Assembly in 1974. While the benefits of UN membership, or in the alternative, a UN upgrade, are manifold, none of them guarantee Palestinian self-determination or freedom from Israeli control. The chapter suggests that this statehood bid could have been a pivot away from complete reliance on the United States to deliver independence and a return to multilateralism that positioned the world superpower as part of the problem rather than the solution. However, the promise of multilateralism, signaled by Palestinians in 2011, has not been realized. The Palestinian leadership has responded to the ever-diminishing potential of the US-brokered peace process with incremental steps into international forums.
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Hiro, Dilip. "An Islamic Revolution in Iran; Initial Misreading by the Saudis." In Cold War in the Islamic World, 55–70. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190944650.003.0004.

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By 1978, with all avenues of secular opposition blocked by the Shah’s dictatorial regime, more and more Iranians had turned to the mosque to voice their growing discontent. The revered Shia cleric, Ayatollah Ruhollah Khomeini, operating from exile in Najaf, Iraq, astutely tapped into Shia history of martyrdom and Iranian nationalism to create and intensify anti-royalist militancy among different classes of Iran. He transformed the escalating street protest into a non-violent revolutionary movement demanding the end of monarchy. It succeeded in February 1979. The freshly inaugurated Islamic Republic, endorsed by citizenry in a referendum, was to be built along the lines of Khomeini’s 1971 book, Islamic Government: Rule of the Just Jurisprudent. .Unfamiliarity with this seminal work led Saudi Deputy Prime Minister, Prince Abdullah, to declare, wrongly, that obstacles to manifold cooperation between the Saudi Kingdom and the Islamic Republic had been removed. The new regime in Tehran established the Islamic Revolutionary Guards, a special force to protect the revolution, and revolutionary courts. Its constitution provided for a directly elected parliament and president, and Assembly of Experts who chose the just jurisprudent as the Supreme Leader. The regime embarked on Islamizing the state and society.
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"Assembly (Chapter 5)." In Index Theory, Coarse Geometry, and Topology of Manifolds, 35–44. Providence, Rhode Island: American Mathematical Society, 1996. http://dx.doi.org/10.1090/cbms/090/05.

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Conference papers on the topic "Manifold assembly"

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Jaske, Carl E. "Creep Strength of Welds in Hydrogen Reformer Outlet Manifolds." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77091.

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This paper reviews the creep strength of welds of the type typically used in hot outlet manifolds of hydrogen reformers. These manifolds can be visualized as a high-temperature piping system that collects the reformed gas from the outlets of the catalyst tubes. The catalyst tube outlet usually is connected to the manifold by means of a flexible pigtail. The pigtail is connected to the manifold via welded fittings, and the components of the manifold assembly are connected by welded joints. These hot manifolds operate under internal pressures in the range of 2000 to 3500 kPa and at temperatures in the range of 800 to 900 °C. The components are typically made of wrought Alloy 800, 800H or 800HT or similar cast 20Cr-32Ni-1Nb alloys. The welds are made using filler metals or electrodes of similar compositions or high-nickel alloy compositions. Creep-rupture data that have been developed for weld metals are reviewed and compared. Problems that have been encountered with failures of welds in this application are discussed. The current recommended materials for welding these manifolds are outlined.
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Senta, Manish, and A. G. Agwu Nnanna. "Design of Manifold for Nanofluid Flow in Microchannel." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42720.

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This paper presents a study of nanofluid flow through microchannel. Its focus is on the design and optimization of microchannel assembly with emphasis on the design of manifold or jacket. The test setup consists of ninety-nine 120μm×120μm×20mm channels, nanofluid flow loop, heat source, thermal sensors and pressure transducers. Flow of nanofluid through the channels is regulated using a peristaltic pump. Numerical iterations were performed to study the effect of inlet and exit flow locations and shape of the jacket on uniform distribution of nanofluid in the channels. Based on the numerical results, it is recommended that for uniform flow distribution in the microchannel, a trapezoidal shaped jacket should be used. The results obtained from this work provided an insight on the variation of the flow patterns within the channel. It reveals that flow uniformity among the channels largely depends on the shape of the manifolds, length and location of inlet and outlets, and the inlet flow rate.
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Sturges, Robert H., and Jui-Te Yang. "Design for Assembly Evaluation of Orientation Difficulty Features." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0105.

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Abstract In support of the effort to bring downstream issues to the attention of the designer as parts take shape, an analysis system is being built to extract certain features relevant to the assembly process, such as the dimension, shape, and symmetry of an object. These features can be applied to a model during the downstream process to evaluate handling and assemblability. In this paper, we will focus on the acquisition phase of the assembly process and employ a Design for Assembly (DFA) evaluation to quantify factors in this process. The capabilities of a non-homogeneous, non-manifold boundary representation geometric modeling system are used with an Index of Difficulty (ID) that represents the dexterity and time required to assemble a product. A series of algorithms based on the high-level abstractions of loop and link are developed to extract features that are difficult to orient, which is one of the DFA criteria. Examples for testing the robustness of the algorithms are given. Problems related to nearly symmetric outlines are also discussed.
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Harms, Robert, Timo Fleschutz, and Gu¨nther Seliger. "Knowledge Based Approach to Assembly System Reuse." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59247.

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The reuse of assembly equipment allows the exploitation of its unused potential, thus complying with both the economic objective of a high level of cost efficiency and the ecological objective of a high level of resource efficiency. Surveys have revealed manifold challenges for practitioners. Lack of experiences with the reuse process, the insufficiently designed and prepared equipment, missing life-cycle documentation as well as missing holistic planning concepts for the reuse where identified as main obstacles. In order to meet these challenges, a framework consisting of methods, tools and business process reference models for assembly equipment reuse is proposed. The core element is a computer aided reuse planning application that allows planners to generate reuse options and provides decision support during the planning process. The knowledge based approach, including its structure and core inference processes, which support the application is explained. The service oriented architecture for the realization of the framework is presented.
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Masuda, Hiroshi, and Kenta Ogawa. "Application of Interactive Deformation to Assembled Mesh Models for CAE Analysis." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34636.

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Mesh deformation, which is sometimes referred to as mesh morphing in CAE, is useful for providing various shapes of meshes for CAE tools. This paper proposes a new framework for interactively and consistently deforming assembly models of sheet structure for mechanical parts. This framework is based on a surface-based deformation, which calculates the vertex positions so that the mean curvature normal is preserved at each vertex in a least squares sense. While existing surface-based deformation techniques cannot simultaneously deform assembly mesh models, our method allows us to smoothly deform disconnected meshes by propagating the rotations and translations through disconnected vertices. In addition, we extend our deformation technique to handle non-manifold conditions, because shell structure models may include non-manifold edges. We have applied our method to assembly mesh models of automobile parts. Our experimental results have shown that our method requires almost the same pre-processing time as existing methods and can deform practical assembly models interactively.
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Choi, Myeonggeun, David R. H. Gillespie, and Leo V. Lewis. "The Effect of External Casing Impingement Cooling Manifold Standoff Distance on Casing Contraction for Thermal Control of Blade Tip Clearance." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-65241.

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Thermal closure of the engine casing is widely used to minimize undesirable blade tip leakage flows thus improving jet engine performance. This may be achieved using an impingement cooling scheme on the external casing wall, provided by manifolds attached to the outside of the engine. The assembly tolerance of these components leads to variation in the standoff distance between the manifold and the casing and its effects on casing contraction must be understood to allow build tolerance to be specified. For cooling arrangements with promising performance, the variation in closure with standoff distance of z/d = 1–6 were investigated. A cooling manifold, typical of that adopted by several engine companies, incorporating three different arrays of short cooling holes (chosen from previous study by Choi et al. (2016)) and thermal control dummy flanges were considered. A series of heat transfer tests using a transient liquid crystal technique were undertaken to measure spatially resolved heat transfer coefficient of a baseline sparse jet array. The experimental heat transfer results validated the extensive numerical predictions using RANS realizable k-epsilon turbulence model. The associated casing contraction was inferred from a finite element analysis using these distributions as the external casing thermal boundary condition. The flow in the system can be modulated to match the closure at different engine operating conditions, the relationship between thermal closure and coolant mass flow rates, inferred from the averaged jet Reynolds numbers assuming uniform distribution between cooling holes was predicted. Typical contractions of 0.5–2.2mm are achieved from the 0.02–0.35kg/s of the current casing cooling flows. The variation in heat transfer coefficient observed with standoff distance is much lower for the sparse array investigated compared to a previous designs employing arrays typical of blade cooling configurations. The reason for this is explained through interrogation of the local flow field and resultant heat transfer coefficient. This implies acceptable control of the circumferential uniformity of case cooling can be achieved with relatively large assembly tolerance of the manifold relative to the casing.
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Bae, Daniel, Raphael Mandel, and Michael Ohadi. "Effect of Bonding Structure and Heater Design on Performance Enhancement of FEEDS Embedded Manifold-Microchannel Cooling." In ASME 2017 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2017 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/ipack2017-74158.

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This work presents the design and characterization of a two-phase, embedded manifold-microchannel (MMC) system for cooling of high heat flux electronics. The study uses a thin-Film Evaporation and Enhanced fluid Delivery System (FEEDS) MMC cooler for high heat flux cooling of electronics. The work builds upon our group’s earlier work in this area with a particular focus on the use of an improved bonding structure and implementation of uniform heat flux heaters that collectively contribute to enhanced performance of the system. In many MMC systems targeted for high heat flux applications microchannels and manifolds are fabricated separately due to different dimensions and tolerances required for each. However, assembly of the system often leaves a gap between the channels and the manifold, thus causing the working fluid to leak through the top of the microfins leading to decreased cooler performance. The effect of this gap is parametrized and analyzed with ANSYS Fluent CFD simulations and discussed in this paper. The findings show that even a few microns wide gap can cause a noticeable degradation of the MMC system performance. Imperfect assembly and the deformation of a microchannel chip due to working fluid pressure can cause gaps, indicating the necessity of uniform and hermetic bonding between the manifold and the tips of the microfins. Furthermore, this work presents the need for better heater designs to enable uniform and high heat flux to the heat transfer surface. Serpentine heaters are often used to mimic electronics in a laboratory environment, but there is a lack of study on the performance characterization of the heaters themselves. In the current work, the performance of a conventional serpentine heater is characterized using ANSYS thermo-electric modeling software. The results show that conventional serpentine heaters are insufficient at providing uniform heat flux in applications where there is a lack of heat spreading-such as in the current embedded cooler — showing deviations ranging over 200 % of the nominal value. The deviations are caused by the many bends present in a serpentine pattern where current density concentrations vary significantly. Two alternate designs are proposed, and numerical simulations show that these new heater designs are capable of providing uniform heat flux, not deviating more than 20% from the nominal heat flux value. The conventional and newly proposed heaters are fabricated, tested, and analyzed with a working FEEDS system.
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Keller, Scott, Afzal Pasha Mohammed, and Khalid Oumejjoud. "Managing Gas Turbine Combustion System Fuel Manifold Distress Through Ultrasonic Inspections and Calibrated Fracture Analyses." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63650.

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One of the common issues within the industrial gas turbine fleet is the susceptibility of a can-annular combustors’ fuel manifold cover (support housings) to develop embedded cracks. These cracks, located in the assembly joint of cover plates that create internal passages for fuel delivery to the combustion system, have enough of a driving force to propagate to the surface of the component. Once a crack propagates to the surface, gas has the potential to leak into the enclosure, posing a potential fire and safety risk. Furthermore, cracked fuel manifold covers are prone to increased NOx levels and excessive dynamics. Consequently, operators have the potential for a forced outage due to the failure of the fuel manifold. Currently, the existing solution is to replace the support housings with new or refurbished housings, with prior analyses requiring near perfect fusion. An ultrasonic inspection procedure has been developed to inspect a combustor’s fuel manifold cover for embedded cracks, which are not currently detectable with FPI or X-ray methods. Through this method, the amount of fusion in the assembly joint is readily obtained, including the ability to understand if the crack is partial-thickness or through-thickness. Parametric fracture analyses, utilizing experimental material test data calibrated to service-exposed components, are conducted to predict the residual life. Coupled with the engine operating data, including the use of cold- or heated-fuels, a recommendation for the remaining useful operation of the support housings can be provided. Ultimately, by completing the ultrasonic inspection and analysis on the support housing/fuel manifold, both the risk of an unplanned outage in the future and the lifecycle management cost to the operator is reduced.
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Mittal, Mayank, Harold Schock, Ravi Vedula, and Ahmed Naguib. "Establishment of a Database by Conducting Intake Manifold and In-Cylinder Flow Measurements inside an Internal Combustion Engine Assembly." In SAE 2013 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2013. http://dx.doi.org/10.4271/2013-01-0565.

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Sawant, P., and S. Bari. "Combined Effects of Variable Intake Manifold Length, Variable Valve Timing and Duration on the Performance of an Internal Combustion Engine." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70470.

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Naturally aspirated internal combustion (IC) engines with a fixed intake assembly are generally tuned to produce an induction boost at a single engine speed by capitalizing the induction pressure waves only over a narrow speed range. This paper investigates the individual and combined effects of varying intake runner length and intake valve timing on the performance parameters of an IC engine at engine speeds from 3000 rpm to 9000 rpm. The 1-D model of the KTM SI engine built for simulations in Ricardo Wave software is validated with 98% accuracy against experimental test results. The performance parameters thus obtained, as a combined effect, show an average improvement of 7.02% throughout the engine’s speed range. With the co-existence of variable length intake runners and variable intake valve opening timing, the required number of variations to boost the engine performance are found to be reduced making variable intake assembly more feasible.
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Reports on the topic "Manifold assembly"

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Estes, James H. A Brief Engineering Analysis of the Prototype NEMSCOM Multiple Outlet Manifold Intended for Use with the SIXCON Fuel Tank Assembly (NSN 5430-01-240-4578). Fort Belvoir, VA: Defense Technical Information Center, September 2013. http://dx.doi.org/10.21236/ada591202.

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