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Dissertations / Theses on the topic 'Cores for flakes'

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1

Mohamed, Jainulabdeen Mohammed Abdul Kadher. "Combustion Noise and Instabilities from Confined Non-premixed Swirl Flames." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1560867354695989.

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2

Cònsul, Serracanta Ricard. "Development of numerical codes for the evaluation of combustion processes. Detailed numerical simulations of laminar flames." Doctoral thesis, Universitat Politècnica de Catalunya, 2002. http://hdl.handle.net/10803/6679.

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Deep knowledge of combustion phenomenon is of great scientific and technological interest due to its presence in a wide range of industrial processes and equipment. Being the most important worldwide energy support provided by combustion of fossil fuels, the goal of developing more efficient and cleaner systems or equipment is clearly justified. In the last decade, the importance of the reduction of pollutant emissions has increased considerably due to both environmental consciousness and to governmental policies, being one of the most important aspects to assure the competitiveness of combust
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3

Bonhomme, Adrien. "Numerical study of laminar and turbulent flames propagating in a fan-stirred vessel." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/12019/1/Bonhomme_adrien.pdf.

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Fossil energy is widely used since the 1900s to satisfy the global increasing energy demand. However, combustion is a process releasing pollutants such as CO2 and NOx. One of the major challenges of the 21th century is to reduce these emissions and car manufacturers are involved in this race. To increase fuel efficiency of piston engines, some technical solutions are developed such as ‘downsizing’. It consists in reducing the engine size while maintaining its performances using a turbocharger to increase the trapped mass in the combustion chamber. Unfortunately, downsizing can lead to abnormal
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4

Moody, Leslie Shane. "Towards the Design and Syntheses of Novel Triads Comprising Single Robson-Type Macrocyclic Dicopper(II) Cores Flanked by Two Terminal Polypyridyl Ruthenium(II) Complexes." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etd/2010.

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Progress toward the syntheses of new tetranuclear bimetallic complexes of copper(II) and ruthenium(II) was realized. The designed triads comprise a central binuclear copper(II) complex with a tetraiminodiphenolate macrocyclic Robson-type compartmental ligand. In the envisioned complexes, the macrocyclic core is further functionalized by attachment of two polypyridyl ruthenium(II) complexes. A novel dibrominated dicopper(II) Robson complex was formed by the 2:2:2 condensation reaction of 4-bromo-2,6-diformylphenol and 1,3- diaminopropane with cupric chloride. Similarly, a new dibrominated dizin
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5

YAMAMOTO, Kazuhiro, Masahisa SHINODA, Hiroshi YAMASHITA та ін. "ランキン渦流中での予混合火炎伝播に与える渦核半径の影響に関する数値解析". 一般社団法人 日本機械学会, 2008. http://hdl.handle.net/2237/19800.

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6

Younger, Alexandra Carla. "Lithic Production at the Mesilla Phase Placitas Arroyo Site Complex Doña Ana County, New Mexico." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538785/.

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This study of lithic analysis shifts attention from typological studies to explicitly behavioral analyses, complimenting studies of both intrasite and intersite patterns of variability and change. Analysis of several assemblages from the Placitas Arroyo site complex reveals changing patterns of raw material procurement and selection, core reduction strategies, as well as tool production and discard. The most striking result thus far is the quite uniform emphasis on flake production from well-prepared cores, and the near absence of manufacture or maintenance of bifacial tools, especially projec
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7

Ayache, Simon Victor. "Simulations of turbulent swirl combustors." Thesis, University of Cambridge, 2012. https://www.repository.cam.ac.uk/handle/1810/243609.

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This thesis aims at improving our knowledge on swirl combustors. The work presented here is based on Large Eddy Simulations (LES) coupled to an advanced combustion model: the Conditional Moment Closure (CMC). Numerical predictions have been systematically compared and validated with detailed experimental datasets. In order to analyze further the physics underlying the large numerical datasets, Proper Orthogonal Decomposition (POD) has also been used throughout the thesis. Various aspects of the aerodynamics of swirling flames are investigated, such as precession or vortex formation caused by f
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8

Neveu, Fabrice. "Mesures simultanées de la température et de la vitesse dans une flamme turbulente non prémélangée méthane-air, stabilisée par un bruleur de type Bluff-Body." Rouen, 1994. http://www.theses.fr/1994ROUES079.

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Des données expérimentales sur les grosses structures ainsi que les corrélations entre certaines grandeurs physiques, telles que la vitesse et la température, sont nécessaires à la compréhension de la flamme turbulente. Pour obtenir de tels renseignements, on utilise l'association de deux techniques qui sont l'anémométrie Doppler laser pour les mesures de vitesse et le thermocouple à fil fin compensé numériquement pour la température. De par leur façon d'acquérir les données, aléatoire pour l'une, à fréquence fixe pour l'autre, ces deux méthodes obligent un traitement spécifique des mesures lo
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9

Baqué, Bénédicte. "Couplage aéro-thermo-mécanique pour la prédiction de la déformation d'une plaque soumise à une flamme." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2012. http://pastel.archives-ouvertes.fr/pastel-00718738.

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Cette thèse consiste à mettre en place un couplage externe aéro-thermo-mécanique, sur la base d'un schéma partitionné, entre les codes de recherche CEDRE (mécanique des fluides, volumes finis) et Z-set (modules indépendants pour la mécanique des structures et la thermique du solide, éléments finis). Les résultats numériques sont confrontés à ceux de l'expérience (une campagne de mesures a été menée dans le cadre de cette étude), dans le cas d'un problème complexe lié au domaine de l'aérospatial : l'interaction flamme-paroi. Ce phénomène est piloté par la thermique, à travers le flux de chaleur
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10

Nguyêñ, Huũ Tuyên. "Etude expérimentale de l'influence de la géométrie de stabilisateur sur le développement d'une flamme non prémélangée." Ecully, Ecole centrale de Lyon, 1999. http://bibli.ec-lyon.fr/exl-doc/TH_T1788_htnguyen.pdf.

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L'objectif de ce travail est de faire ressortir l'influence de l'aérodynamique du sillage d'un obstacle sur les mécanismes de stabilisation de la flamme non prémélangée. Cette aérodynamique est régie non seulement par la dynamique des écoulements mais aussi et surtout par la géométrie de l'accroche-flamme. Elle a été étudiée sur une configuration expérimentale non confinée de deux écoulements (combustible et air) séparés, concentriques, et dans le cas de deux stabilisateurs simplifiés (disque et tulipe). Des visualisations directes ont été réalisées et complétées par des mesures quantitatives
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11

OUDOUCHE, Houda. "Le débitage sur éclat dans la Méditerranée occidentale durant le Paléolithique moyen: Abric Romani (Capellades, Espagne) et Ifri n’Ammar (Rif oriental, Maroc)." Doctoral thesis, Università degli studi di Ferrara, 2015. http://hdl.handle.net/11392/2389006.

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The purpose of this research is to investigate the débitage Kombewa, discovered from 1938 in East Africa, and subsequently defined as a flaking method of the predetermined flake from the ventral surface of the flaked-flake. However, the same type of product could be obtained by the knapping of a bifacial piece, preparing a striking platform on the ventral side or by recycling an ancient flake. The Kombewa is better known in the Lower Palaeolithic, but it remains insufficiently characterized during the Middle Palaeolithic, and many aspects such as its status and the aim of its production are n
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12

Lyra, Wellington da Silva. "Um método espectrométrico de emissão em chama baseado em imagens digitais para determinação indireta de fármacos e determinação simultânea de sódio e cálcio." Universidade Federal da Paraí­ba, 2012. http://tede.biblioteca.ufpb.br:8080/handle/tede/7116.

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Made available in DSpace on 2015-05-14T13:21:30Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 12264651 bytes, checksum: c1dad0a27d50ddb05acdcc8e21042b61 (MD5) Previous issue date: 2012-09-11<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In this work the potential of the Digital Image-Based Flame Emission Spectrometry (DIB-FES) is demonstrated through two completely separate applications. The first one consists in the indirect determination of three drugs in injectable form: sodium dicofenac, sodium dipyrone and clacium gluconate and the second in the combin
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13

Hradský, Peter. "Polyfunkční dům." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226343.

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Multifunctional buliding is designed as a alone standing new buliding in the cadastral area of Žilina on a private plot no. 4518, Alexandra Street Rudnaya. The buidling is situated in the older part of city build in the sixties with the dominanting residental houses. Type of the multipurpose building is dominant with a residental function. The building totaly contains four apartment units. In the ground floor are offices, spaces of surgeries and access to housing and accessories. Each function has a separate entrance, which is designed for handicapped. In the basemnt of the building are design
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14

"Development of numerical codes for the evaluation of combustion processes. Detailed numerical simulations of laminar flames." Universitat Politècnica de Catalunya, 2002. http://www.tesisenxarxa.net/TDX-0317105-154418/.

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15

"Towards the Design and Syntheses of Novel Triads Comprising Single Robson-Type Macrocyclic Dicopper(II) Cores Flanked by Two Terminal Polypyridyl Ruthenium(II) Complexes." East Tennessee State University, 2008. http://etd-submit.etsu.edu/etd/theses/available/etd-1110108-021053/.

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