Relevant bibliographies by topics / Glassy Swirls

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Glassy Swirls'

Author: Grafiati
Published: 6 September 2023
Last updated: 7 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Glassy Swirls.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Glassy Swirls"

1

Do¨bbeling, K., A. Eroglu, D. Winkler, T. Sattelmayer, and W. Keppel. "Low NOx Premixed Combustion of MBtu Fuels in a Research Burner." Journal of Engineering for Gas Turbines and Power 119, no. 3 (July 1, 1997): 553–58. http://dx.doi.org/10.1115/1.2817020.

Full text
Abstract:
The paper reports on the development and testing of a premix research burner for MBtu fuels. The burner has a quartz glass annular mixing section and a quartz, glass flame tube to allow visualization of the flame. A central lance is used to mount modules for fuel injection, swirl generation, and flame stabilization. This allows a large number of variants with different swirl strength, mixing section length, fuel injection geometry, and flameholder size and shape to be easily tested. Experiments have been performed at atmospheric pressure and under high-pressure conditions (14 bar pressure, 400°C air preheat temperature) for syngas with a H2/CO ratio of up to 5. In a preliminary study, the mixing quality of the tested variants has been assessed with planar laser-induced fluorescence (LIF). High-pressure combustion tests show that low NOx (<10 vppmd @ 15 percent O2) premix combustion of MBtu fuels under industrial GT conditions without dilution is feasible.
APA, Harvard, Vancouver, ISO, and other styles
2

Machado, Andreia, Sophie Wolf, Luis C. Alves, Ildiko Katona-Serneels, Vincent Serneels, Stefan Trümpler, and Márcia Vilarigues. "Swiss Stained-Glass Panels: An Analytical Study." Microscopy and Microanalysis 23, no. 4 (June 23, 2017): 878–90. http://dx.doi.org/10.1017/s1431927617000629.

Full text
Abstract:
AbstractThe history and iconography of Swiss stained glass dating between the 16th and 18th centuries are well studied. However, the chemical and morphological characteristics of the glass and glass paints, particularly the nature of the raw materials, the provenance of the glass, and the technology used to produce it are less well understood. In this paper, we studied two sets of samples from stained-glass panels attributed to Switzerland, which date from the 16th to 17th centuries: the first set comes from Pena National Palace collection, the second from Vitrocentre Romont. The aims were to identify the materials used in the production of the glass, to find out more about their production origin and to characterize the glass paints. Both glass and the glass paints were analysed by particle-induced X-ray emission; the paints were additionally analysed by scanning electron microscopy–electron-dispersive X-ray spectroscopy (SEM-EDS). The results show that the glass from both sets was probably produced in the same region and that wood ash was used as a fluxing agent. Different recipes have been used to make the blue enamels. However, the cobalt ore used as a coloring agent in all of the blue enamels came from the mining district in Schneeberg, Germany.
APA, Harvard, Vancouver, ISO, and other styles
3

Elahi, M., and Y. J. Weitsman. "The Mechanical Response of Random Swirl-Mat Polymeric Composite." Journal of Engineering Materials and Technology 121, no. 4 (October 1, 1999): 460–67. http://dx.doi.org/10.1115/1.2812402.

Full text
Abstract:
This article concerns the mechanical response of random glass fiber strand swirl-mat/urethane matrix composite under static and cyclic loads as well as under elevated temperatures. The article presents an extensive amount of experimental data as well as predictions based upon a coupled damage/viscoelastic constitutive formulation generated specifically to model the behavior of the material at hand. Damage evolution relations are derived from an empirical relationship. This work extends previously published results.
APA, Harvard, Vancouver, ISO, and other styles
4

Lecasse, Florian, Raphaël Vallon, Frédéric Polak, Clara Cilindre, Bertrand Parvitte, Gérard Liger-Belair, and Virginie Zéninari. "An Infrared Laser Sensor for Monitoring Gas-Phase CO2 in the Headspace of Champagne Glasses under Wine Swirling Conditions." Sensors 22, no. 15 (August 2, 2022): 5764. http://dx.doi.org/10.3390/s22155764.

Full text
Abstract:
In wine tasting, tasters commonly swirl their glasses before inhaling the headspace above the wine. However, the consequences of wine swirling on the chemical gaseous headspace inhaled by tasters are barely known. In champagne or sparkling wine tasting, starting from the pouring step, gas-phase carbon dioxide (CO2) is the main gaseous species that progressively invades the glass headspace. We report the development of a homemade orbital shaker to replicate wine swirling and the upgrade of a diode laser sensor (DLS) dedicated to monitoring gas-phase CO2 in the headspace of champagne glasses under swirling conditions. We conduct a first overview of gas-phase CO2 monitoring in the headspace of a champagne glass, starting from the pouring step and continuing for the next 5 min, with several 5 s swirling steps to replicate the natural orbital movement of champagne tasters. The first results show a sudden drop in the CO2 concentration in the glass headspace, probably triggered by the liquid wave traveling along the glass wall following the action of swirling the glass.
APA, Harvard, Vancouver, ISO, and other styles
5

Nawfel Muhammed Baqer Muhsin, Noor Hussein Dhaher, and Mohamed Alfahham. "Effect of LPG Emission on the Performance of Glass Bending Furnace." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 103, no. 1 (March 8, 2023): 64–74. http://dx.doi.org/10.37934/arfmts.103.1.6474.

Full text
Abstract:
The extant research design LPG give a good temperature distribution for a specific burner design of low consumption burners and relays to a method for bending the glass sheets, in which method the swirl burner LPG is used in a small furnace. Using LPG fuel gives more stability in the combustion process, the LPG is a gaseous fuel that helps to have easy control of the combustion rate and the temperature behavior inside the combustion zone by increasing and decreasing the mixing ratio with air. The heat flux from the flame moves in the front direction due to the momentum of the fuel mixture and the design of the burner rim, which keep the flow adhesive, such behavior leads to creating different temperature zone since the combustion process is a continuous process. The main result is that clean or low emission combustion of LPG fuel will increase the gained temperature and give a good temperature distribution for a specific burner design of low consumption burners and the clean combustion will reduce the unwanted deformation of soot on melting glass surface. Generally, high energy cost and the environmental pollution are the major issues in the glass industries which must be reduced through reduce the fuel consumption of the glass furnaces. For these reasons, this type of furnace can be used in other applications, not only in melting glass.
APA, Harvard, Vancouver, ISO, and other styles
6

Karger-Kocsis, J. "Environmental stress corrosion behavior of polyamides and their composites with short glass fiber and glass swirl mat." Polymer Bulletin 26, no. 1 (1991): 123–30. http://dx.doi.org/10.1007/bf00299357.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Edelson, J. V., and J. J. Magaro. "Onion Thrips Insecticide Dose Response, 1987." Insecticide and Acaricide Tests 16, no. 1 (January 1, 1991): 290. http://dx.doi.org/10.1093/iat/16.1.290.

Full text
Abstract:
Abstract Onion thrips were collected from onion plants in south Texas during Mar 1987 and used to establish a laboratory culture. Thrips were reared on green onions in plastic containers at 25°C and a 12 h photoperiod. Response to insecticide dose concentration was evaluated by treating 60 × 15 mm glass petri dishes with 1 ml of differing concentration solutions of Ammo 2.5 EC, Nudrin 1.8 EC and Penncap-M 21% in acetone. The solution was swirled in the bottom of the glass dish for 1 min and then the remaining liquid was poured out. Dishes were air dried for 2 h. Larval thrips were transferred to dishes and exposed for 2 h at 25°C. Thrips were considered dead if no response was detected after gentle probing.
APA, Harvard, Vancouver, ISO, and other styles
8

Boonin, Kitipun, Warawut Sa-Ardsin, and Jakrapong Kaewkhao. "Luminescence Characteristics of Li2O3:Gd2O3:B2O3:Dy2O3 Glasses System." Key Engineering Materials 675-676 (January 2016): 414–17. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.414.

Full text
Abstract:
Melt quenching technique have been used to prepare the dysprosium-doped lithium-gadolinium borate glasses, which have the composition [60Li2O:10Gd2O3:(30-x) B2O3:xDy2O3] (LGBO:Dy3+), under atmospheric pressure. Some properties: density, molar volume, absorption spectra and photoluminescence of the LGBO:Dy3+ glasses were investigated and discussed. The density of glasses drops to the minimum point at 0.05 mol% and swings after that point. The molar volume of the glasses does not depend on Dy2O3concentration. In absorption spectra for the range of visible to near infrared wavelengths, there are 5 obvious peaks indicating the Dy3+ in glass network. The intensity of each peak at certain wavelength increases with concentration of the Dy2O3. Whereas the excitation spectra show 7 obvious peaks representing the transitions from the ground state 6H15/2to various excited states. The Xenon compact arc lamps were used to measure the emission spectra with 388 nm light. As the result, the LGBO:Dy3+ glass sample with 0.50 mol% of Dy3+ shows the highest intensity in the emission spectra.
APA, Harvard, Vancouver, ISO, and other styles
9

Barraud, Emmanuel. "Stained Glass Solar Windows for the Swiss Tech Convention Center." CHIMIA International Journal for Chemistry 67, no. 3 (March 27, 2013): 181–82. http://dx.doi.org/10.2533/chimia.2013.181.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Yilmaz, Galip, Apichart Devahastin, and Lih-Sheng Turng. "Conventional and Microcellular Injection Molding of a Highly Filled Polycarbonate Composite with Glass Fibers and Carbon Black." Polymers 14, no. 6 (March 16, 2022): 1193. http://dx.doi.org/10.3390/polym14061193.

Full text
Abstract:
Conventional solid injection molding (CIM) and microcellular injection molding (MIM) of a highly filled polycarbonate (PC) composite with glass fibers and carbon black were performed for molding ASTM tensile test bars and a box-shape part with variable wall thickness. A scanning electron microscope (SEM) was used to examine the microstructure at the fractured surface of the tensile test bar samples. The fine and uniform cellular structure suggests that the PC composite is a suitable material for foaming applications. Standard tensile tests showed that, while the ultimate strength and elongation at break were lower for the foamed test bars at 4.0–11.4% weight reduction, their specific Young’s modulus was comparable to that of their solid counterparts. A melt flow and transition model was proposed to explain the unique, irregular “tiger-stripes” exhibited on the surface of solid test bars. Increasing the supercritical fluid (SCF) dosage and weight reduction of foamed samples resulted in swirl marks on the part surface, making the tiger-stripes less noticeable. Finally, it was found that an injection pressure reduction of 25.8% could be achieved with MIM for molding a complex box-shaped part in a consistent and reliable fashion.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Glassy Swirls"

1

Wannassi, Manel. "Etude des transferts thermiques par batteries de jets pour la trempe du verre." Thesis, Valenciennes, 2013. http://www.theses.fr/2013VALE0022/document.

Full text
Abstract:
La trempe à l’air est largement utilisée dans les procédés de production de verre de sécurité. L’obtention d’une distribution de contraintes adéquate requiert un refroidissement intense et homogène à la fois, et ces deux propriétés sont difficiles à obtenir sur la courte durée de la trempe. Les batteries de jets utilisées dans la plupart des systèmes de trempe produisent un refroidissement adéquat mais souffrent d’inhomogénéité, à l’origine de défauts de trempe et de casse durant le processus.L’objectif de cette thèse est d’explorer des nouvelles configurations qui améliorent l’homogénéité du refroidissement en préservant son intensité. L’approche choisie consiste à implanter des jets rotatifs dans les réseaux de manière à accentuer le mélange des jets avant impact. Les études ont été menées principalement par simulation numérique, corroborées par des visualisations par enduit gras sur un banc d’essai dédié, conçu et réalisé dans le cadre de cette thèse.La première phase a été consacrée à la conception des générateurs de jets rotatifs et à l’étude de leur dynamique en mode isolé. Le développement d’une structure tourbillonnaire se formant à l’entrée de chaque lobe du dispositif de mise en rotation a été mis en évidence. L’interaction des jets rotatifs dans le réseau de refroidissement constitue la deuxième phase. Il apparait que la structure cellulaire du schéma d’impact n’est que marginalement perturbée par les jets rotatifs et que la présence de ces derniers n’influe que peu sur la dynamique de l’écoulement. Enfin, la modélisation détaillée des transferts de chaleur sur la plaque d’impact montre que les jets rotatifs ne contribuent que faiblement au refroidissement, mais que l’interférence avec le réseau de jets simples augmente légèrement le transfert de chaleur local au niveau de leur impact. Sans avoir obtenu les résultats escomptés, cette thèse a toutefois montré la complexité du système et le couplage fort entre les phases d’alimentation et d’évacuation de l’air de refroidissement
Air quenching is widely applied in security glass manufacturing processes. Proper residual stresses distribution requires strong and homogeneous cooling and both are difficult to achieve over the very short time of the tempering process. Jet arrays used in most processes provide with sufficient cooling but suffer from inherent inhomogeneity, leading to quality loss of the glass product and, in extreme cases, to unacceptable breaking numbers during production.The objective of the present study is to investigate ways to improve cooling homogeneity while maintaining efficiency. For this purpose, swirling jets are located inside the jet arrays to enhance jet mixing prior to impingement. Numerical simulation is performed, corroborated by oil flow visualization and a dedicated test bench has been designed and set up within the frame of this thesis.The first part was concerned with the design of swirlers and their dynamic behaviour in standalone mode. It has been shown that a vortex is forming at the inlet of each swirl compartment. Inserting the swirlers within jet arrays constitutes the seconf phase. It turns out that the cellular structure of the impingement pattern is only marginally affected by the swirlers, which have a weak influence on the flow dynamics. Last, the detailed heat transfer modeling on the impingement surface shows that the swirlers themselves do barely contribute to the overall cooling, while the coupling with the simple jet array slightly improves the local heat transfer close to the impingement area. Although the expected outcome was not achieved, this thesis showed the flow complexity as well as the strong coupling between the feeding and the exhaust phases experienced by the cooling air
APA, Harvard, Vancouver, ISO, and other styles
2

Mandal, Rituparno. "Glassy Dynamics in Active Matter." Thesis, 2017. https://etd.iisc.ac.in/handle/2005/4233.

Full text
Abstract:
There has been much interest in the glassy dynamics of living systems at the scales of subcellular structures, cells and tissues. This has motivated theoretical studies on the approach to glassy behaviour in dense systems driven by activity, opening up new questions, both in the physics of glass transitions and in active matter. A key issue is whether active glasses are akin to passive ones with an effective temperature or whether they are fundamentally different. In this thesis we address some of these issues using a variety of simulation and analytical techniques.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Glassy Swirls"

1

Baldwin, Philip. Philip Baldwin, Monica Guggisberg: In search of clear lines. Berne: Benteli Verlag, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Baldwin, Philip. Philip Baldwin, Monica Guggisberg: L'arche de verre. Vendin-le-Vieil: Revue de la céramique et du verre, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sniff, swirl & slurp: How to get more pleasure out of every glass of wine. London: M. Beazley, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Müller, Christina. Hinterglasmalerei: Richard Tisserand. Biel-Bienne: Edition Clandestin, 2014.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

1955-, Guggisberg Monica, Musée Ariana, and MAK Frankfurt, eds. Baldwin/Guggisberg: Au-delà du verre = beyond glass. Milan, Italy: 5 Continents Editions, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

1930-, Eggenschwiler Franz, ed. Franz Eggenschwiler: Werkverzeichnis der Objekte, Malereien und Glasbilder 1946 bis 2000. Eriswil]: Franz und Rosemarie Eggenschwiler-Wiggli Stiftung, 2018.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Schilter, Hans. Hans Schilter: Das öffentliche Werk. Edited by Lehmann Norbert. Pfäffikon SZ: Edition Seedamm-Kulturzentrum, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Lee, Hendrix, Wolf Scott C. 1956-, J. Paul Getty Museum, and St Louis Art Museum, eds. Painting on light: Drawings and stained glass in the age of Dürer and Holbein. [Los Angeles, Calif.]: J. Paul Getty Museum, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Block, Stanley A. Antique Glass Swirl Marbles. Schiffer Publishing, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Alice Through the Looking Glass Dots Swirls Waves Diagonals Lines Coloring Book: Alice Through the Looking Glass Spirograph Styles Colouring Books for Adults, Tweens. Independently Published, 2021.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Glassy Swirls"

1

Dalton, David R. "Drinking the Wine." In The Chemistry of Wine. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190687199.003.0035.

Full text
Abstract:
The bottled beverage before you is to be opened. This work has already described the bottle (colorless or not), the closure (screw cap, synthetic cork and cork), and the contents (the wine). If the wine is not a table wine (vin ordinaire or vin de pays) which is simply enjoyed in a family or informal surrounding where the details of the container into which it is poured are less important, then it is generally found that: (a) clear colorless glass or crystal is used so that the visual appeal of the beverage can be enjoyed; (b) the bowls of wine glasses (except for sparkling wines and dessert wines) will be tapered upward from the stem into a bulbous shape which diminishes again at the top; and (c) the rim of the glass will be thin enough to allow it to be unnoticed when the wine is sipped. It is held that these are important, and in particular, the shape of the glass helps retain the more volatile constituents for the consumer’s enjoyment. Bowls used in glasses for red wines are more rounded so that when half full, the surface area is large. For white wines, this is considered less important, and of course, for Champagne and other sparkling wines, where conical flutes are used, a small surface area is avoided to enhance the flow of bubbles. As the wine briefly stands, perhaps having been swirled, it is often found that “legs” or “tears” of wine are seen to form on the wall above the surface. Their appearance is, in part, a function of temperature as well as the alcohol content of the wine and the resulting surface tension of the liquid. Then, using capillary action, the liquid climbs the side of the glass. Both alcohol and water evaporate, but the alcohol evaporates faster, so more liquid is drawn up from the bulk. The wine thus moves up the side of the glass and forms droplets that run back down the glass.
APA, Harvard, Vancouver, ISO, and other styles
2

Kidd, Edwina, and Ole Fejerskov. "When should a dentist restore a cavity?" In Essentials of Dental Caries. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780198738268.003.0007.

Full text
Abstract:
At the start of this book it was commented that some dentists see restorative dentistry (fillings) as the treatment of dental caries. These dentists see prevention of caries as a separate issue. The authors profoundly disagree with this. The previous chapters have shown how dental caries develops and what it is, so in this chapter it is important to ask the question ‘with this knowledge in mind, what is the role of restorations (restorative dentistry) in caries control?’ Are restorations required or can the problem be solved by sealing all surfaces in the oral cavity—or at least those parts where surface irregularities (occlusal fissures, grooves, pits, etc.) may favour biofilm stagnation? Therefore, this chapter starts with a discussion of so-called fissure sealants. On occlusal surfaces, caries lesions may form at the entrance to the fissure because this complex morphology may be difficult to clean, particularly in the erupting tooth that is below the level of the arch and tends to be missed as the toothbrush swings by. Fissure sealants cover the fissures with a flowable resin or highly viscous glass ionomer cement, so that they are easier to clean. Their effectiveness has been proved in many studies. When first introduced in developed nations, all molar surfaces were recommended for sealing to avoid caries development and the need for fillings. This ‘sealing all teeth’ policy would now be totally incorrect for two reasons: ◆ Caries can be controlled by cleaning alone. ◆ Many of these surfaces will never develop lesions, and this automatic sealing approach is over treatment and not cost-effective. The indications for fissure sealing are: ◆ Active fissure caries has been diagnosed, but attempts at caries control have not arrested lesion progression. ◆ Occlusal surfaces are often highly irregular, and filled with grooves and fissures, and the patient or parent either cannot, or will not, remove plaque effectively. This is particularly important in the erupting molar. This surface is particularly at risk of lesion development and progression because permanent teeth can take 6–12 months to erupt; indeed, third molars may take several years.
APA, Harvard, Vancouver, ISO, and other styles
3

Steinberg, Paul F. "Scaling Up." In Who Rules the Earth? Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780199896615.003.0013.

Full text
Abstract:
José Delfín Duarte rises at the crack of dawn in a neighborhood on the outskirts of San Isidro, Costa Rica. He grabs his machete and rain parka, puts on his black galoshes, and heads out in a flatbed truck up a series of muddy roads surrounded by lush forest interspersed with farms. Eventually he arrives at a small water-distribution facility located at the top of a hill overlooking the surrounding watershed. He checks the station’s tanks, carefully noting the water levels. Duarte is the elected leader of a group of local citizens who have been given responsibility for managing water resources in their community. They decide how much water is used and how it will be allocated among families and farms in the area. They collect user fees, purchase equipment, and make numerous daily decisions affecting water use. Their role stems from a power-sharing arrangement with the Costa Rican government, which in recent years has crafted similar agreements with hundreds of local water associations throughout the country. Six thousand miles to the east, Claudia Olazábal begins her day in the outer suburbs of Brussels. She takes the subway to her office in the European Commission, a sleek modern glass and steel building where she heads the Biodiversity Unit of the European Union’s Directorate General for the Environment. On this particular day, her attention is focused on the design of new rules for the control of invasive species, which pose a major threat to ecosystems worldwide. Six years in the making, this rule came about after extensive consultation with stakeholders throughout the twenty-seven member countries of Europe—farmers unions and botanic gardens, prime ministers and pet shop owners. Working with a professional staff of Swiss and Germans, Poles and Portuguese, and many other nationalities, Olazábal is preparing for a lengthy negotiation involving lawmakers throughout the continent in a complex dance that will hopefully produce a new European policy on invasive species. Claudia Olazábal and José Delfín Duarte operate worlds apart, yet they have much in common. Both are creating rules that will shape our planet for decades and even centuries to come.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Glassy Swirls"

1

Utschick, Matthias, and Thomas Sattelmayer. "Flame Holding in the Premixing Zone of a Gas Turbine Model Combustor After Forced Ignition of H2-NG-Air-Mixtures." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56246.

Full text
Abstract:
Flashback and self-ignition in the premixing zone of typical gas turbine swirl combustors in lean premixed operation are immanent risks and can lead to damage and failure of components. Thus, steady combustion in the premixing zone must be avoided under all circumstances. This study experimentally investigates the flame holding propensity of fuel injectors in the swirler of a gas turbine model combustor with premixing of H2-NG-air-mixtures under atmospheric pressure and proposes a model to predict the limit for safe operation. The A2EV swirler concept exhibits a hollow, thick walled conical structure with four tangential slots. Four fuel injector geometries were tested. One of them injects the fuel orthogonal to the air flow in the slots (jet-in-crossflow-injector, JICI). Three injector types introduce the fuel almost isokinetic to the air flow at the trailing edge of the swirler slots (trailing edge injector, TEI). A cylindrical duct and a window in the swirler made of quartz glass allow the application of optical diagnostics (OH* chemiluminescence and Planar Laser Induced Fluorescence of the OH radical (OH-PLIF)) inside the swirler. The fuel-air-mixture was ignited with a focused single laser pulse during steady operation. The position of ignition was located inside the swirler in proximity to a fuel injection hole. If the flame was washed out of the premixing zone not later than four seconds after the ignition the operation point was defined as safe. Operation points were investigated at three air mass flows, three air ratios, two air preheat temperatures (573 K, 673 K) and 40 to 100 percent per volume hydrogen in the fuel composed of hydrogen and natural gas. The determined safety limit for atmospheric pressure yields a similarity rule based on a critical Damköhler number. Application of the proposed rule at conditions typical for gas turbines leads to these safety limits for the A2EV burner: With the TEIs the swirler can safely operate with up to 80 percent per volume hydrogen content in the fuel at an air ratio of two. With the JIC injector safe operation at stoichiometric conditions and 95 percent per volume hydrogen is possible.
APA, Harvard, Vancouver, ISO, and other styles
2

Liu, Xiaoming, Masaru Kojima, Qing Shi, Yasushi Mae, Qiang Huang, Tatsuo Arai, and Toshio Fukuda. "Generation of swirl flow for non-contact rotation of micro objects by vibrating glass needle." In 2016 International Symposium on Micro-NanoMechatronics and Human Science (MHS). IEEE, 2016. http://dx.doi.org/10.1109/mhs.2016.7824197.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Döbbeling, K., A. Eroglu, D. Winkler, T. Sattelmayer, and W. Keppel. "Low NOx Premixed Combustion of MBtu Fuels in a Research Burner." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-126.

Full text
Abstract:
The paper reports on the development and testing of a premix research burner for MBtu fuels. The burner has a quartz glass annular mixing section and a quartz glass flame tube to allow visualization of the flame. A central lance is used to mount modules for fuel injection, swirl generation and flame stabilization. This allows a large number of variants with different swirl strength, mixing section length, fuel injection geometry and flameholder size and shape to be easily tested. Experiments have been performed at atmospheric pressure and under high pressure conditions (14 bar pressure, 400°C air preheat temperature) for syngas with a H2/CO ratio of up to 5. In a preliminary study the mixing quality of the tested variants has been assessed with planar laser induced fluorescence (LIF). High pressure combustion tests show that low NOx (< 10 vppmd @ 15% O2) premix combustion of MBtu fuels under industrial GT conditions without dilution is feasible.
APA, Harvard, Vancouver, ISO, and other styles
4

Symmons, Alan, Ray Pini, and William V. Moreshead. "Characterization of moldable glass for imaging lenses in the shortwave infrared (SWIR)." In SPIE Defense + Security, edited by Bjørn F. Andresen, Gabor F. Fulop, Charles M. Hanson, and Paul R. Norton. SPIE, 2014. http://dx.doi.org/10.1117/12.2050692.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Weber, Gernot, Uwe Petzold, and Ralf Jedamzik. "From VIS to SWIR: a challenge for optical glass and IR materials." In Optical Components and Materials XV, edited by Michel J. Digonnet and Shibin Jiang. SPIE, 2018. http://dx.doi.org/10.1117/12.2297161.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Koyama, Masamichi, Hiroshi Fujiwara, Laurent Zimmer, and Shigeru Tachibana. "Effects of Swirl Combination and Mixing Tube Geometry on Combustion Instabilities in a Premixed Combustor." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90891.

Full text
Abstract:
In this paper, flow fields inside a premixed combustor have been investigated by CFD analysis and PIV measurement in a preheating, non-reacting condition. Four types of premixer are examined. The design of the premixer is determined by the combination of swirlers and mixing tubes. There are two variations of triple-concentric swirlers and three variations of mixing tubes. Comparisons are made among mean velocity distributions derived from CFD and PIV. PDF analysis is performed on the data from PIV to discuss the possibility of the occurrence of flashback. Combustion rig tests have been carried out also on similar condition to see combustion instabilities depending on the choice of premixers and operating conditions. Flame is directly observed from crystal windows placed on the side and downstream of the combustion chamber. A glass rod is installed on the wall of the mixing tube so as to see light emissions inside the tube, i.e. evidence of flashback. Pressure fluctuations at the combustor liner are measured in one position. The spectra of pressure fluctuations are computed to look at the possibility of combustion oscillations. Discussions are made on the relation between the global flame structure and pressure modes. Finally, proper premixer configurations to prevent combustion instabilities are proposed.
APA, Harvard, Vancouver, ISO, and other styles
7

Zhao, Yang, Daniel J. L. Williams, Peter McCarthy, Anthony J. Visconti, Julie L. Bentley, and Duncan T. Moore. "Chromatic correction for a VIS-SWIR zoom lens using optical glasses." In SPIE Optical Engineering + Applications, edited by Ellis Betensky and Takanori Yamanashi. SPIE, 2015. http://dx.doi.org/10.1117/12.2187533.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Bréhault, A., L. Calvez, T. Pain, H. L. Ma, D. Bigou, M. Duchêne, P. Adam, J. Rollin, and X. H. Zhang. "Evaluation of chalcogenide glasses for multispectral imaging in the visible, SWIR and LWIR spectral regions." In SPIE Defense + Security, edited by Jay N. Vizgaitis, Bjørn F. Andresen, Peter L. Marasco, Jasbinder S. Sanghera, and Miguel P. Snyder. SPIE, 2016. http://dx.doi.org/10.1117/12.2222900.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Dal Cengio Leonardi, Alessandra, Cynthia Bir, Dave Ritzel, and Pamela VandeVord. "The Effects of Apertures on Internal Pressure Measured During Shock Wave Exposure." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53586.

Full text
Abstract:
Blast-induced neurotrauma with no overt damage to the skull has been identified as a condition suffered by military personnel serving in Iraq and Afghanistan (Glasser 2007). Symptoms of mild blast neurotrauma include alterations in cognitive functions (memory, language, problem-solving-skills) and in emotional behavior (mood swings, depression, anxiety, emotional outbursts) (Okie 2005). Despite the improvements in helmets and body armors, many veterans returning from the war front are being diagnosed with mild blast-neurotrauma (Warden 2006). Little is known of the means by which brain injury results from exposure to blast where there is no evident physical damage to the head. This study looks at possible mechanisms of brain injury related to blast by examining how pressure transmission occurs within a skull/brain surrogate system. Investigations were carried out to resolve the variables affecting skull dynamics and their effect on pressure imparted to the brain. Testing assessed internal pressure profiles as a function of ambient overpressure, orientation of the sample to shock-front exposure, and the presence of apertures.
APA, Harvard, Vancouver, ISO, and other styles
10

Bakker, Andre´. "Modeling Turbulence in Stirred Vessels: A Review and Recent Developments." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3102.

Full text
Abstract:
Prediction of the mixing of multi-component fluids is important in many chemical process applications. Although laminar mixing is a complicated process per se (involving multi-component diffusion coefficients, for example), there is a far greater challenge in predicting mixing in turbulent flows because of their intrinsic, chaotic nature. In turbulent flows, large-scale eddies with coherent structures are mainly responsible for the mixing of passive scalars. The large-scale eddies embody themselves in the form of identifiable and organized distributions of vorticity. In addition, the mixing process involves all mechanisms typically found in vortex dynamics, such as stretching, break-up, concatenation, and self-induction of vortices. Experimental work suggests that large-scale, time-dependent structures, with periods much longer than the time of an impeller revolution, are involved in many of the fundamental hydrodynamic processes in stirred vessels. For example, local velocity data histograms may be bi-modal or tri-modal, even though they are being analyzed as having only one mode in most Laser-Doppler experiments. Digital particle image velocimetry experiments have shown that large-scale asymmetries with periods up to several minutes exist in stirred vessels equipped with axial flow impellers. These complex phenomena are not limited to single-phase systems. Many industrial vessels are operated with a multiphase flow. In such systems, the gas holdup distribution may be asymmetric and oscillating. In solids suspension processes, solids can be swept from one side of the vessel to the other in an oscillating pattern, even in dilute suspensions. The numerical modeling of these complicated mixing processes is a daunting task. Direct numerical simulation (DNS) provides the most exact approach in which the mechanism involved in turbulent mixing can be accurately represented. DNS requires resolving the smallest eddies, which makes the approach prohibitively expensive, even with the most powerful computers of the present day and foreseeable future as well. On the other hand, the popular approaches based on Reynolds-Averaged Navier-Stokes (RANS) equations amount to averaging out the large eddies that are primarily responsible for mixing. One is left to model the effects of large eddies by relying on empirical data and phenomenological reasoning and hypotheses, which are often questionable. The advantage of Large Eddy Simulation (LES) is that it explicitly resolves the large eddies, which are responsible for much of the mass, energy, and momentum transport, and only small eddies are modeled with a sub-grid model. In this lecture we will first briefly review the fundamentals of turbulent flows in stirred vessels, and how modeling these has evolved during the past decade. The focus will be on those aspects of turbulence that are relevant to mixing processes and the modeling thereof. We will continue with a discussion of the applicability of various turbulence models. For single-phase systems, we will then discuss the application of LES to the prediction of large-scale chaotic flow structures in stirred tanks. The focus of those studies is on systems with unsteady flows that are especially difficult to model with eddy-viscosity style models, namely those with strong swirl such as glass-lined mixing vessels (which usually have one baffle) and multiple impeller systems with strong interaction between the impeller flows. For multiphase systems, turbulence modeling is an even greater challenge. Interesting developments in this field include the use of LES models coupled with discrete particle simulations. More recently, full Reynolds stress models for use on unstructured finite volume meshes for Eulerian-Eulerian multiphase flow models have become available. Recent results with these models and expected future developments will be discussed.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Glassy Swirls' for particular source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography