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Tesi sul tema "Combustion"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Tajiri, Kazuya. "Simulations of combustion dynamics in pulse combustor." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12175.

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2

Fernandes, Renato. "Metodologia de projeto de queimadores a jato para fornos de clínquer." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264846.

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Orientador: Waldir Antônio Bizzo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-18T17:06:17Z (GMT). No. of bitstreams: 1 Fernandes_Renato_M.pdf: 7631607 bytes, checksum: 14334de2da1bd698c87a4fd0efbed3f4 (MD5) Previous issue date: 2011<br>Resumo: Os queimadores a jato são caracterizados pela elevada quantidade de movimento na direção axial e elevada potência, estes queimadores são muito empregados em fornos rotativos, principalmente na indústria do cimento e da calcinação. O projeto de queimadores a jato é

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3

Leng, Jing. "Combustion processes within a gas fired pulsed combustor." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307945.

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4

Bishop, Robert Phelps. "Combustion efficiency in internal combustion engines." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15164.

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Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING<br>Bibliography: leaf 26.<br>by Robert Phelps Bishop.<br>B.S.

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5

Hossain, Abu Norman. "Combustion of solid fuel in a fluidized bed combustor." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176492911.

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6

Hossain, Abu Noman. "Combustion of solid fuel in a fluidized bed combustor." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176492911.

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7

Lei, Yafeng. "Combustion and direct energy conversion in a micro-combustor." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4311.

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The push toward the miniaturization of electromechanical devices and the resulting need for micro-power generation (milliwatts to watts) with low-weight, long-life devices has led to the recent development of the field of micro-scale combustion. Since batteries have low specific energy (~200 kJ/kg) and liquid hydrocarbon fuels have a very high specific energy (~50000 kJ/kg), a miniaturized power-generating device, even with a relatively inefficient conversion of hydrocarbon fuels to power, would result in increased lifetime and/or reduced weight of an electronic or mechanical system that curre

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8

Chow, Siu-Kei. "Flow and combustion characteristics of a liquid-fuelled combustor." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46714.

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9

Ichihashi, Fumitaka. "Investigation of Combustion Instability in a Single Annular Combustor." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1299617901.

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10

Ribeiro, Natália da Silva [UNESP]. "Estudo termogravimétrico da combustão e oxicombustão de misturas carvão mineral-biomassa." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/149903.

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Submitted by NATALIA DA SILVA RIBEIRO null (nsribeiro2@gmail.com) on 2017-03-21T14:14:32Z No. of bitstreams: 1 Defesa Natalia_Final..pdf: 3776400 bytes, checksum: 4147b87ccc01a8c95a9e60c44f70613b (MD5)<br>Rejected by Luiz Galeffi (luizgaleffi@gmail.com), reason: Solicitamos que realize uma nova submissão seguindo a orientação abaixo: O arquivo submetido está sem a ficha catalográfica. A versão submetida por você é considerada a versão final da dissertação/tese, portanto não poderá ocorrer qualquer alteração em seu conteúdo após a aprovação. Corrija esta informação e realize uma nova

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11

Bai, Tiejun. "Combustion of liquid fuels in a Rijke type pulse combustor." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/12491.

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12

Deppe, Martin W. "Combustion efficiency in a dual-inlet side-dump ramjet combustor." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283564.

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13

LI, GUOQIANG. "EMISSIONS, COMBUSTION DYNAMICS, AND CONTROL OF A MULTIPLE SWIRL COMBUSTOR." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1092767684.

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14

Metzger, Brian. "Glycerol Combustion." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-07312007-153859/.

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As worldwide production of biodiesel fuel increases, one of the largest concerns is the abundance of waste glycerol. The price of crude glycerol has fallen drastically and many large biodiesel producers are currently paying to landfill this large waste stream. In the search to find a value added alternative, glycerol combustion may be one of the simplest solutions. Heat recovered from glycerol oxidation could easily be used to reduce heating costs inherent to large-scale biodiesel production. It has been stated ?Combustion of glycerol would be an elegant solution, if it worked?. Clean combusti

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15

Radhakrishnan, Arun. "Self-sustained combustion of low grade solid fuels in a stagnation-point reverse-flow combustor." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50275.

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This thesis investigates the use of the Stagnation-Point Reverse-Flow (SPRF) combustor geometry for burning low-grade solid fuels that are attractive for specific industrial applications because of their low cost and on-site availability. These fuels are in general, hard to burn, either because of high moisture and impurity-content, e.g. biomass, or their low-volatiles content, e.g., petroleum-coke. This results in various challenges to the combustor designer, for example reduced flame stability and poor combustion efficiency. Conventional solutions include preheating the incoming flow as well

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16

YAMAMOTO, Kazuhiro, Satoshi INOUE, Hiroshi YAMASHITA, Daisuke SHIMOKURI, and Satoru ISHIZUKA. "Flow Field of Turbulent Premixed Combustion in a Cyclone-Jet Combustor." The Japan Society of Mechanical Engineers, 2007. http://hdl.handle.net/2237/9384.

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17

Awosope, Iyiola Olumide. "Flameless oxidation combustion modelling and application to a gas turbine combustor." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419936.

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18

Weber, Matthew F. "Characterization of Combustion Dynamics in a Liquid Model Gas Turbine Combustor Under Fuel-Rich Conditions." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1562060065192189.

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19

Hilbert, Renan. "Etude de la combustion turbulente non prémélangée et partiellement prémélangée par simulations numériques directes." Châtenay-Malabry, Ecole centrale de Paris, 2002. http://www.theses.fr/2002ECAP0856.

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Ce travail présente l’étude de flammes turbulentes non-prémélangées et partiellement prémélangées par simulations numériques directes (DNS) en utilisant des modèles détaillés de chimie de transport. L’interaction entre une flamme H2/Air et un champ de turbulence est simulée et l’influence de la diffusion différentielle sur la structure de la flamme est qualifiée. On note en particulier l’absence de corrélation entre la température de flamme et le taux de dissipation scalaire quand un modèle de transport élaboré est utilisé, ainsi qu’une modification de la limite d’équilibre. Le ré-établissemen

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20

Hillion, Mathieu. "Contrôle de combustion en transitoires des moteurs à combustion interne." Phd thesis, École Nationale Supérieure des Mines de Paris, 2009. http://pastel.archives-ouvertes.fr/pastel-00005749.

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Cette thèse traite le problème du contrôle de combustion des moteurs automobiles à combustion interne. On propose une méthode complétant les stratégies de contrôle existantes reposant sur des cartographies calibrées en régime stabilisé. Pendant les transitoires, cette méthode de contrôle utilise des variations de la variable rapide (moment d'allumage ou d'injection) pour compenser les déviations des conditions initiales des variables thermodynamiques dans les cylindres (variables lentes) par rapport à leurs valeurs optimales. Les corrections sont calculées grâce à une analyse de sensibilité d'

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21

Ghorbali, Ali. "Cyclic variation in combustion in a constant volume combustion chamber." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6757.

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Cycle to cycle variations in combustion and turbulence characteristics in a swirling flow were measured in a cylindrical vessel. The vessel was charged by rapid tangential injection using a shrouded valve for two valve lifts (7 mm and 12 mm). A premixed lean mixture of propane and air ($\phi$ = 0.8) was ignited at quarter radius from the center. Pressure rise as a function of time was measured using a pressure transducer. Mean flow, turbulence intensity and Taylor microscale were estimated by statistical analysis of a single hot wire anemometer signal using ensemble averaging and cyclic analys

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22

Sone, Kazuo. "Unsteady simulations of mixing and combustion in internal combustion engines." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12171.

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23

Heising, Raymond. "Effectiveness of pulsed spray combustion for suppression of combustion instabilities." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16682.

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24

Shah, Priti. "Mathematical modelling of flow and combustion in internal combustion engines." Thesis, University of Greenwich, 1989. http://gala.gre.ac.uk/8703/.

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The research work reported herein addresses the problem of mathematical modelling of fluid flow and combustion in internal combustion engines. In particular, the investigation of three topics that constitute prime sources of uncertainty, in current numerical models, namely turbulence modelling, inaccuracies in the solution procedure specific to moving grids, and combustion modelling. Two and three-dimensional computations of the in-cylinder turbulent flow in a diesel engine are described first, with emphasis on the modifications made to the standard k- model of turbulence to account for rapid

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25

Alganash, Blaid Sasi Abozeid. "Numerical investigation of the combustion processes of various combustion regimes." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/7124/.

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This thesis concerns numerical investigations of the combustion behaviour of various combustion regimes. The simulations are based on modelling the flow of the fuels in the combustion devices. Computational fluid dynamics (CFD) modelling and analysis were used in three different works. FLUENT software, which is based on the finite volume method, is used to carry out all the simulations. Firstly, numerical simulations were carried out to investigate the turbulent non-premixed combustion of a mixture of methane (CH4) 90% and nitrogen (N2) 10%, on volume basis, inside an axis-symmetric cylindrica

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26

Du, Jianyi. "Combustion CFD simulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/NQ56437.pdf.

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27

Strand, Carina Renée. "Catalytic combustion control." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21120.

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A mathematical model representing the dynamic behaviour observed at the actual catalytic incineration plant at Perstorp was derived. The model equations for the two main process units, the heat exchanger and the incinerator, were based on the lumped systems approach in order to avoid using partial differential equations. The model was written in Matlab and implemented in Simulink using s-functions for the dynamic study. By analyzing the dynamic data from the actual plant, it was discovered that the possible source of the ocassional large temperature variations in the incinerator is the periodi

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28

Martin, Kendrick. "Switchgrass combustion studies." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29537.

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This thesis presents fundamental research about the combustion gas products and solid phase residue of switch grass combustion. To identify the compounds released during the combustion phase, tests were conducted using a Thermogravimetric Analyzer (TGA) coupled to a Fourier Transform Infrared Spectrometer. These test revealed that aromatic compounds as well as carbon dioxide and water were released.<br>High Pressure Liquid Chromatography (HPLC) and GCMS/GCFID were also used to identify and semi-quantify polycyclic aromatic hydrocarbons (PAH) and benzene derivatives. From these analyses it was

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29

Cairns, Malcolm. "Titanium particle combustion." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86572.

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In order to increase the validity of numerical models of the detonation of heterogeneous titanium explosives, experimental results are needed. The combustino of titanium is studied using two experimental techniques. The first technique is the study of the burn time for a single particle over a wide range of initial diameters while altering the oxygen concentration. To accomplish this a new flat flame burner to study particle burn time has been designed. Luminous tracks caused by the light emitted by the combustion of the particles are analyzed and burn time is inferred. Burn time in air and in

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30

Bhidayasiri, Roongrueng. "Control of combustion." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286243.

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31

Williams, R. "Submerged flame combustion." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636655.

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The objective of this work is to better understand the operation of Submerged Flame Burners, commonly known as Submerged Combustion Burners. Two main aspects require consideration, namely: practical applications of the technology in industry; secondly, theoretical modelling of the flame behaviour within the Submerged Combustion Burner in order to ensure flame stability in the burner and hence heat transfer efficiency and reliable operation. The current status of the Submerged Combustion Technology has been reviewed, detailing the separation equipment items that, overall, make up an industrial

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32

Pearce, Steven Mitchell. "Hydrogen enhanced combustion." Thesis, University of Canterbury. Mechanical Engineering, 2000. http://hdl.handle.net/10092/6047.

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Current four stroke engine research objectives focus on increasing part load thermal efficiency while reducing exhaust emissions. Methods currently employed to achieve this are homogeneous charge lean burn technology, stratified charge lean burn technology and the use of alternative fuels. Of all possible alternative fuels hydrogen is viewed by many as being, ultimately, the fuel of the future. Methanol is regarded as being a likely transitional fuel between the current petroleum transport fuels and hydrogen. Hydrogen is known to be effective in extending the operating lean limit of an engine

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33

Harding, Stephen C. "Investigation into mixing and combustion in an optical, lean, premixed, prevaporised combustor." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359964.

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34

Venkatesh, Vishnu P. (Vishnu Pravin). "Thermal design and analysis of a recuperative combustor for gas-turbine combustion." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/101313.

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35

Wan, Ab Karim Ghani Azlina. "Co-combustion of biomass fuels with coal in a fluidised bed combustor." Thesis, University of Sheffield, 2006. http://etheses.whiterose.ac.uk/14891/.

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Co-combustion of biomass with coal has been investigated in a 0.15 m diameter and 2.3 m high fluidised bed combustor under various fluidisation and operating conditions. Biomass materials investigated were chicken waste, rice husk, palm kernel shells and fibres, refuse derived fuel and wood wastes. These were selected because they are produced in large quantities particularly in the Far East. The carbon combustion efficiency was profoundly influenced by the operating and fluidising parameters in the decreased following order: fuel properties (particle size and density), coal mass fraction, flu

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36

Xu, Min. "Chemical looping combustion : cold model hydrodynamics and modeling of methane combustion." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/27743.

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A novel interconnected fluidized bed (IFB) reactor with a bypass line for chemical looping combustion (CLC) has been developed to overcome the problem of short residence time of oxygen carrier in the air reactor. A comprehensive hydrodynamic study was carried out on the cold-flow model of the proposed reactor. Detailed mapping of the operating conditions for the reactor system was studied. Pressure transducers were applied to investigate the pressure loops and the cross-sectional average solids hold-up along the air reactor. Solids circulation flux between the two reactors was measured usi

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37

Forsberg, Peter. "Combustion Valve Wear : A Tribological Study of Combustion Valve Sealing Interfaces." Doctoral thesis, Uppsala universitet, Tillämpad materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204636.

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The exhaust valve system of combustion engines experiences a very complex contact situation of frequent impact involving micro sliding, high and varying temperatures, complex exhaust gas chemistry and possible particulates, etc. In addition, the tribological situation in the exhaust valve system is expected to become even worse due to strict future emission regulations, which will require enhanced combustion and cleaner fuels. This will substantially reduce the formation of combustion products that might ease the contact conditions by forming tribofilms on the contacting surfaces. The lack of

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38

Farrow, Timipere Salome. "A fundamental study of biomass oxy-fuel combustion and co-combustion." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/27633/.

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While oxy-fuel combustion research is developing and large scale projects are proceeding, little information is available on oxy-biomass combustion and cocombustion with coal. To address this knowledge gap, this research conducted has involved comprehensive laboratory based fundamental investigation of biomass firing and co-firing under oxy-fuel conditions and compared it to conventional air firing conditions. First, TGA was employed to understand the fundamental behaviour of biomass devolatilisation, char combustion and nitrogen partitioning between volatiles and residual char. The results re

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39

Horning, Marcus. "Feedback Control for Maximizing Combustion Efficiency of a Combustion Burner System." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1459356183.

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40

Mohanraj, Rajendran. "Modeling of combustion instabilities and their active control in a gas fueled combustor." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/12089.

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41

Silva, Nerivaldo Rodrigues da. "Metodologia para determinação da potencia indicada em motores de combustão interna." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263004.

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Orientador: Caio Glauco Sanchez<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-07T22:05:21Z (GMT). No. of bitstreams: 1 Silva_NerivaldoRodriguesda_M.pdf: 4894128 bytes, checksum: 69ef45ea8aa8986f3f2bb33a0866b270 (MD5) Previous issue date: 2006<br>Resumo: Neste trabalho buscou-se desenvolver um método para a determinação da potência indicada em motores de combustão interna e medição da pressão de combustão com um osciloscópio. Para isto é necessário conhecer a curva de pressão de combustão do cilindro em

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42

Botura, César Augusto [UNESP]. "Desenvolvimento de um sistema de incineração de resíduos sólidos para utilização com combustão pulsante." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/106449.

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Made available in DSpace on 2014-06-11T19:35:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-11Bitstream added on 2014-06-13T20:27:54Z : No. of bitstreams: 1 botura_ca_dr_guara.pdf: 4170323 bytes, checksum: 21316bd955d294e528bc1edcbfa2bd8b (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Universidade Estadual Paulista (UNESP)<br>Este trabalho tem a finalidade de investigar a incineração de resíduos sólidos na presença de ondas acústicas para incrementar o processo de combustão. Para tanto foi projetado e construído um forno rotativo para incineração de resí

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43

Tongroon, Manida. "Combustion characteristics and in-cylinder process of CAI combustion with alcohol fuels." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/4501.

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Controlled auto-ignition (CAI) combustion in the gasoline engine has been extensively studied in the last several years due to its potential for simultaneous improvement in fuel consumption and exhaust emissions. At the same time, there has been increasing interest in the use of alternative fuels in order to reduce reliance on conventional fossil fuels. Therefore, this study has been carried out to investigate the effect of alcohol fuels on the combustion characteristics and in-cylinder processes of CAI combustion in a single cylinder gasoline engine. In order to study the effect of alcohol fu

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44

Chung, Nguyen Thai. "Pre-integrated non-equilibrium combustion-response mapping for internal combustion engine emissions." Thesis, University of Glasgow, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412952.

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45

Turner, Dale Michael. "The combustion and emissions performance of fuel blends in modern combustion systems." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/1165/.

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The combustion and emissions performance of fuel blends in modern combustion systems has been investigated with the intention of reducing emissions, improving efficiency and assessing the suitability of future automotive fuels. The combustion systems used in this study include Homogeneous Charge Compression Ignition (HCCI) and Direct Injection Spark Ignition (DISI). By adding a small quantity (10%) of diesel to gasoline, the HCCI combustion of this ‗Dieseline‘ mixture shows a 4% increase in the maximum and a 16% reduction in the minimum loads (IMEP) achievable. The NOX emissions are reduced, w

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46

Milovanović, Nebojša. "A study of controlled auto ignition (CAI) combustion in internal combustion engines." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/19906.

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Controlled Auto Ignition (CAI) combustion is a new combustion principle in internal combustion engines which has in recent years attracted increased attention. In CAI combustion, which combines features of spark ignition (SI) and compression ignition (CI) principles, air/fuel mixture is premixed, as in SI combustion and auto-ignited by piston compression as in CI combustion. Ignition is provided in multiple points, and thus the charge gives a simultaneous energy release. This results in uniform and simultaneous auto-ignition and chemical reaction throughout the whole charge without flame propa

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47

Ranasinghe, D. J. "Modelling partially premixed turbulent combustion in a spark ignited internal combustion engine." Thesis, University of Cambridge, 2000. https://www.repository.cam.ac.uk/handle/1810/272095.

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48

Garba, Mohammed Umar. "Prediction of ash deposition for biomass combustion and coal/biomass co-combustion." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/4373/.

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In this thesis, a model that couples a reduced alkali kinetic mechanism for alkali sulphate formation during biomass combustion with an ash deposition model using computational fluid dynamics (CFD) techniques has been presented. Starting with a detailed gas-phase kinetic mechanism for the alkali chemistry, a systematic reduction procedure has been performed using a sensitivity analysis to reduce the reaction mechanism to a level that can be implemented into a CFD calculation. An ash deposition model that takes into consideration the ash-sticking probability and the condensation of potassium sa

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49

Okon, Aniekan. "Combustion dynamics in a lean premixed combustor with swirl forcing and fuel conditions." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/108265/.

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Fossil fuels still account for a large percentage of global energy demand according to available statistics. Natural gas is increasingly gaining the share of these fuels due to the retired coal and nuclear plants. The more stringent emission standards have also put natural gas ahead of other fuels as a result of its efficiency, cost, environmental attributes as well as the operational efficiency of the gas turbine, an engine that uses this fuel. A standard low emission combustion technique in gas turbines is the dry low NOx combustion, with lean fuel and fuel-air premixed upstream of the flame

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Dody, Joseph W. "Study of biomass combustion characteristics for the development of a catalytic combustor/gasifier." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/43039.

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Abstract (sommario):

The research reported here explored, a "new" approach to biomass energy conversion for small-scale process heat-applications. The conversion process uses close-coupled catalytic. combustion to burn combustibles in effluent generated by primary combustion or gasification of biomass fuels. Computer control of primary and secondary air flow rates allow control of the devices output power while maintaining fuel-lean or stoichiometric conditions in the effluent entering the catalytic combustion zone. The intent of the secondary combustion system is to ensure "clean" exhaust (i.e., promote complete

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