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Dissertations / Theses on the topic 'Flashovers'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Jamaladdeen, Rawaa. "Investigation on Wildfire Flashovers in the Mediterranean Climate Regions with Emphasis on VOCs Contributions." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2023. http://www.theses.fr/2023ESMA0015.

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Cette thèse apporte des réponses aux demandes de la communauté des pompiers d'étudier les facteurs probables responsables de l'intensification des régimes de feux de forêt jusqu'aux flashovers en utilisant des approches expérimentales numériques et thermochimiques. Le modèle numérique est un modèle de dispersion de gaz validant les données expérimentales des essais en soufflerie pour résoudre la controverse quant à savoir si les accumulations de composés organiques volatils (COV) dans des topographies confinées finissent par induire des incendies de forêt. Il comprend un front de feu se propag

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2

Gerini, Francesco. "Locating lightning strikes and flashovers along overhead power transmission lines using electromagnetic time reversal based similarity characteristics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Questo lavoro di tesi si pone l’obiettivo di analizzare, verificare e implementare un nuovo metodo per la localizzazione di guasti in rete e fulminazioni basato sulla teoria ”Electromagnetic Time Reversal”. L’applicabilità della teoria è inizialmente discussa, successivamente utilizzando le classiche equazioni delle linee e le basi della teoria EMTR viene proposta una soluzione analitica per la localizzazione del guasto e/o della fulminazione. La accuratezza del metodo utilizzato viene discussa in relazione al numero di misure necessarie alla localizzazione mettendo in evidenza pro e contro ri

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3

Feasey, R. "Post-Flashover Design Fires." University of Canterbury. Civil Engineering, 1999. http://hdl.handle.net/10092/8266.

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This report reviews the modelling of post-flashover fires and compares the various methods of predicting temperature versus time in post-flashover compartment fires, including the historical development of theoretical approaches. The report specifically addresses the use of the COMPF2 model as implemented in the COMPF2PC computer programme, as a prediction tool for post-flashover fire temperatures. Aspects of the computer code are compared with theory and experimental data. The results of many COMPF2PC simulations are compared with test fire data, in order to determine how best to characteri

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4

Chen, Aiping. "Empirical and experimental studies of flashover in compartment fire." Thesis, University of Central Lancashire, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410489.

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5

Benwell, Andrew L. "Flashover prevention on polystyrene high voltage insulators in a vacuum." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5018.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 18, 2008) Includes bibliographical references.

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6

Kamel, Sherif I. (Sherif Ibrahim). "Mathematical modeling of wet flashover mechanism of HVDC wall bushings." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28792.

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HVDC wall bushings constitute a basic component of converter stations and their adequate performance is vital to insure a highly reliable level of operation. Service records show that the number of flashovers in converter stations has increased substantially during recent years and that the majority of flashovers occurred on HVDC wall bushings. This work presents the first mathematical model to provide the necessary and sufficient conditions for flashover of HVDC wall bushings under nonuniform wetting. The model suggests that the onset of streamers bridging the dry zone and initiated by the no

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7

Martini, Pietro. "Live-line working and evaluation of risk on 400kV transmission line." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/liveline-working-and-evaluation-of-risk-on-400kv-transmission-line(b19247d6-22cc-4815-b865-d80a957dfd7b).html.

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Power industries in transmission and distribution level are obligated to maintain and replace their electrical equipment. Maintaining the quality and continuity of supply is their priority to avoid customers' complaints and financial penalisation. Live-line working as one of the most important methods of maintenance has been used since the 1900s where the new methods in 1960s made the live-line workers enabled to work on the higher voltage levels up to 800kV. Various industries adopt different techniques to calculate the minimum approach distance (MAD) during the live-line work. A suitable met

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8

Okubo, Hitoshi, Kenji Tsuchiya, Hiroki Kojima, and Tsugunari Ishida. "Development mechanism of impulse surface flashover on alumina dielectrics in vacuum." IEEE, 2010. http://hdl.handle.net/2237/14535.

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9

Patni, Prem K. "Review of models which predict the flashover voltage of polluted insulators." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq23449.pdf.

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10

Nielsen, Christian. "An Analysis of Pre-Flashover Fire Experiments with Field Modelling Comparisons." University of Canterbury. Civil Engineering, 2000. http://hdl.handle.net/10092/8284.

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Firstly, this report investigates the behaviour of pre-flashover fires conducted in a two-compartment structure. Secondly, it looks at preliminary field modelling results of the pre-flashover fires using the SMARTFIRE program. A two-compartment structure was built so that pre-flashover fire experiments could be conducted. Each room in the compartment measured 2.4 m wide, 3.6 m long, and 2.4 m high. A doorway, with dimensions 2.0 m high and 0.8 m wide separated the rooms. All fires were placed in one room (the fire room) where seven fire experiments were conducted consisting of four differen

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11

Tsuchiya, Kenji, Hitoshi Okubo, Tsugunari Ishida, Naoki Hayakawa, and Hiroki Kojima. "Development Process of Impulse Surface Flashover on Alumina Dielectrics in Vacuum." IEEE, 2011. http://hdl.handle.net/2237/20729.

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12

Zhou, Jianping. "A study of charge accumulation and spacer flashover in compressed gas insulation." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/32116.

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Compressed gas insulated substation (GIS) and transmission line (GITL) equipment have been developed rapidly throughout the world during the past decades. Compactness is the main advantage of GIS and GITL over conventional air-insulated substations and transmission lines. Sulphur hexafluoride (SF₆) is used as an insulation gas in GIS and GITL because of its excellent insulating properties. Supporting spacers are identified as the most likely places for flashover to occur and they often determine the overall strength of a system. For energized system, surface charges have been observed on space

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13

Hill, Kenneth Harvey. "Estimation of positive polarity switching surge flashover voltage of compact transmission lines." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0013/MQ41715.pdf.

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14

Tsuchiya, Kenji, Hitoshi Okubo, Tsugunari Ishida, Hidenori Kato, and Katsumi Kato. "Influence of Surface Charges on Impulse Flashover Characteristics of Alumina Dielectrics in Vacuum." IEEE, 2009. http://hdl.handle.net/2237/14600.

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15

Kato, Hidenori, Katsumi Kato, Ayumu Morita, and Hitoshi Okubo. "Influence of Surface Charges on Alumina Dielectrics on Impulse Flashover Characteristics in Vacuum." IEEE, 2008. http://hdl.handle.net/2237/12132.

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16

Farzaneh-Dehkordi, Jalil. "Experimental study and mathematical modeling of flashover of EHV insulators covered with ice." Thèse, Chicoutimi : [Rimouski : Université du Québec à Chicoutimi ;. Université du Québec à Rimouski], 2003. http://theses.uqac.ca.

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Thèse (M.Eng.) -- Université du Québec à Chicoutimi, programme extensionné a l'Université du Québec à Rimouski, 2004.<br>Bibliogr.: f. 97-104. Document électronique également accessible en format PDF. CaQCU

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17

Yii, Ee Hieng. "Modelling the effects of fuel types and ventilation openings on post-flashover compartment fires." Thesis, University of Canterbury. Civil Engineering, 2002. http://hdl.handle.net/10092/7728.

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This thesis describes the details used to model a post-flashover fire compartment as a well-stirred reactor. In particular, it examines the two foremost important variables that dictate post-flashover fire behaviour inside the fire compartment. These two variables are: (1) the mass flow rate of air into the compartment via the vent opening and (2) the fuel mass loss rate inside the compartment. The vent flow analysis shows that the orifice analogy typically used to describe compartment vent flow is restricted to small wall opening applications. For large wall openings, such as a window occupy

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18

Rezazada, A. Qayoum. "Modeling of the effect of reduced air pressure on AC flashover voltage of polluted insulators." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55644.

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19

Andersson, Lucas. "Thermal Exposure Caused by the Smoke Gas Layer in Pre-flashover Fires : A Two-zone Model Approach." Thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60971.

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A pre-flashover fire is very different from a post-flashover fire. The main difference is that in a pre-flashover fire the gas temperature and the radiation temperature differ. One thing that makes it a lot different is that the thermal exposure induced by a pre-flashover fire is largely affected by the smoke gas layer. These smoke gases can be very hot and therefore they emit heat radiation to their surroundings. The theory used, to calculate the thermal exposure of a pre-flashover fire, in this thesis relies on using thermal resistances to describe the heat transfer from the smoke gases. By

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20

PEREIRA, Carlos Simões. "Processo de attachment, densidade de raios e a ocorrência de flashover em linhas de transmissão de eletricidade." Universidade Federal do Pará, 2014. http://repositorio.ufpa.br/jspui/handle/2011/6555.

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Submitted by Irvana Coutinho (irvana@ufpa.br) on 2015-04-17T16:30:06Z No. of bitstreams: 2 license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) Tese_ProcessoAttachmentDensidade.pdf: 2920689 bytes, checksum: b99ba47daa0ec8c62b44eb98e2ecc364 (MD5)<br>Approved for entry into archive by Ana Rosa Silva (arosa@ufpa.br) on 2015-04-20T11:58:27Z (GMT) No. of bitstreams: 2 license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) Tese_ProcessoAttachmentDensidade.pdf: 2920689 bytes, checksum: b99ba47daa0ec8c62b44eb98e2ecc364 (MD5)<br>Made available in DSpace on

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21

Fielding, Trevor J. "An investigation of the field electron emission processes responsible for the flashover of high voltage vacuum devices." Thesis, Aston University, 1986. http://publications.aston.ac.uk/8050/.

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22

Kleinhans, Kevin. "Investigation into possible mechanisms of light pollution flashover of 275kv transmission lines as a cause of unknown outages." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1071.

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23

Studhalter, Jakob. "A probabilistic comparison of times to flashover in a compartment with wooden and non-combustible linings considering variable fuel loads." Thesis, University of Canterbury. Department of Civil and Natural Resources Engineering, 2012. http://hdl.handle.net/10092/7650.

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Prescriptive fire safety codes regulate the use of combustible room linings to reduce fire risk. These regulations are based on classification systems which designate materials according to their relative hazard when exposed to a standard fire scenario. However, no quantitative data sets on the fire risk of wooden lining materials exist which take into account relevant uncertainties, such as movable fuel loads in compartments. This work is a comparative risk analysis on the influence of wooden linings on the time to flashover in a compartment, considering uncertainties in the fuel load configu

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24

Alles, Joan. "Investigations on flashover of polluted insulators : Influence of silicone coating on the behavior of glass insulators under steep front impulse." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC058.

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Cette thèse s’inscrit dans le cadre de l’amélioration du comportement électrique des isolateurs de lignes haute tension ; l’objectif est d’assurer une meilleure fiabilité et qualité d’alimentation en énergie électrique. Ce travail a été motivé par la nécessité de répondre à trois questions liées au comportement des isolateurs verre en zone polluée. La première porte sur la recherche d’une méthode permettant de calculer la tension de contournement des chaînes polluées selon le type d’isolateur et ses caractéristiques. La deuxième question concerne la différence de comportement entre les isolate

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25

Byström, Alexandra. "Compartment Fire Temperature Calculations and Measurements." Doctoral thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59927.

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This thesis is devoted to heat transfer and fire dynamics in enclosures. It consists of a main part which summarizes and discusses the theory of heat transfer, conservation of energy, fire dynamics and specific fire scenarios that have been studied. In the second part of this thesis, the reader will find an Appendix containing seven scientific publications in this field. In particular, one- and two-zone compartment fire models have been studied. A new way of calculating fire temperatures of pre- and post-flashover compartment fires is presented. Three levels of solution techniques are presente

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26

Wardman, John Blackburn. "Vulnerability of Electric Power Systems to Volcanic Ashfall Hazards." Thesis, University of Canterbury. Geological Sciences, 2013. http://hdl.handle.net/10092/8014.

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Volcanic eruptions are powerful natural events which impact strongly on society. As human populations grow and expand into volcanically active areas, their exposure and vulnerability to volcanic hazards is also increasing. Of all volcanic hazards, ashfall is the most likely to impact lifelines because of the large areas affected. The widespread dispersal of ash can cause large-scale disruption of vital infrastructure services, aviation, and primary production. Electric power supply is arguably the most crucial of modern infrastructure systems, especially considering the dependence of other sec

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27

Cortés, Daniel. "Modelado y simulación para la predicción de explosiones en espacios confinados." Doctoral thesis, Universidad de Alicante, 2021. http://hdl.handle.net/10045/115293.

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Los incendios en recintos confinados son un tipo de emergencia que involucra a bomberos cuyas vidas a veces se ponen en peligro. En cualquier incendio confinado, el equipo de emergencia puede encontrar dos tipos de ambientes de combustión, ventilados o infra-ventilados. El comportamiento cambiante de este escenario depende de múltiples factores como el tamaño del recinto, la ventilación o el combustible involucrado, entre otros. Sin embargo, la dificultad de manejar este tipo de situaciones junto con el potencial error humano sigue siendo un desafío sin resolver para los bomberos en la actuali

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28

Slama, Mohammed El-Amine. "Etude expérimentale et modélisation de l'influence de la constitution chimique et de la répartition de la pollution sur le contournement des isolateurs haute tension." Thesis, Ecully, Ecole centrale de Lyon, 2011. http://www.theses.fr/2011ECDL0023/document.

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Ce travail porte sur la caractérisation optique et électrique ainsi que la modélisation mathématique du contournement d’isolateurs pollués en tenant compte de la forme de tension appliquée, de la répartition ainsi que de la constitution chimique du dépôt polluant. Sous tension de choc de foudre (1,2/50μs), la morphologie des décharges ainsi que les courants associés dépendent de la tension (forme, amplitude, polarité),de la répartition de la pollution et de sa conductivité. Les vitesses moyennes de la décharge mesurées dépendent de la polarité appliquée à la pointe et de la conductivité de la

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Parkes, Anthony Richard. "The impact of size and location of pool fires on compartment fire behaviour." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2009. http://hdl.handle.net/10092/3444.

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An understanding of compartment fire behaviour is important for fire protection engineers. For design purposes, whether to use a prescriptive code or performance based design, life safety and property protection issues are required to be assessed. The use of design fires in computer modelling is the general method to determine fire safety. However these computer models are generally limited to the input of one design fire, with consideration of the complex interaction between fuel packages and the compartment environment being simplified. Of particular interest is the Heat Release Rate, HRR, a

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30

Douar, Adnane. "Recherche de matériaux isolants pour la conception d'une nouvelle génération de connecteurs électriques haute tension : influence de la pollution sur les phénomènes de décharges partielles du contournement et de claquage." Thesis, Ecully, Ecole centrale de Lyon, 2014. http://www.theses.fr/2014ECDL0046/document.

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Dans le présent travail, nous abordons une problématique essentielle liée aux accessoires des lignes électriques et plus particulièrement au connecteur à perforation d’isolant (TTDC 45501 FA), commercialisé par la société Sicame située à Arnac-Pompadour (Corrèze). Ce produit permet d’effectuer des dérivations de courant en moyenne tension gainé HTA entre 15 et 25kV. Cependant, il devient nécessaire de concevoir une nouvelle génération de connecteurs capable de fonctionner à une tension de 52 kV en raison de la constante augmentation des besoins en électricité. En réalité, le principal souci co

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"Three dimensional flame reconstruction towards the study of fire-induced transmission line flashovers." Thesis, 2007. http://hdl.handle.net/10413/2076.

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The work presented in this thesis focuses on the problem of reconstructing threedimensional models of fire from real images. The intended application of the reconstructions is for use in research into the phenomenon of fire-induced high voltage flashover, which, while a common problem, is not fully understood. As such the reconstruction must estimate not only the geometry of the flame but also the internal density structure, using only a set of a few synchronised images. Current flame reconstruction techniques are investigated, revealing that relatively little work has been done on the subject

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32

Taheri, Ledari Shamsodin. "Two-arc dynamic modeling of AC and DC flashovers of EHV post station insulators covered with ice based on laboratory experiments." Thèse, 2014. http://constellation.uqac.ca/2786/1/030620915.pdf.

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L'accumulation de glace et de neige sur les isolateurs a été reconnue comme l'un facteur de risque les plus importants dans la fiabilité des lignes de transmission aériennes et des postes électriques. La glace accumulée sur les isolateurs peut amorcer des décharges électriques le long des zones exempts de glace, souvent appelés espaces d'air. En présence d'un film d'eau très conducteur à la surface de la glace, sous une tension appliquée suffisamment élevée, des décharges partielles peuvent être initiées et se développer en arcs partiels. Sous certaines conditions, ces arcs partiels peuvent en

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33

Reske, Dean. "Modeling of High Voltage Pollution Discharge to Investigate Hot Stick Flashover." 2013. http://hdl.handle.net/1993/18487.

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Electric “flashover” or insulation breakdown has occurred on “hot stick” safety tools used on live AC transmission lines at Manitoba Hydro in 1997 and 2002. Investigations showed pollution flashover as the cause, whereby leakage currents cascade into flashover. Prior to reinstating live-line work with mitigation procedures, DC voltage experiments suggested an atypical flashover uncharacteristic of pollution flashover without leakage currents, which may require a different mitigation strategy. In this thesis, statistical analysis shows that relative humidity has a greater correlation than volta

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CHEN, LU SO, and 盧守謙. "A Study on Catastrophe Model of Flashover." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/hk33bb.

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碩士<br>中央警察大學<br>消防科學研究所<br>88<br>The last decade has seen a substantial increase in the mathematical modeling of fire growth within buildings. In particular, a number of deterministic models have been developed to characterize the dynamical behavior of compartment fires within buildings. Meanwhile in the mathematics field, arguably the most exciting development is the discovery of chaos and catastrophe, introducing a shift away from the Newtonian paradigm. This has led to a mushrooming of activities in the theoretical and computationally experimental fields of nonlinear dynamical systems, resu

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TSE, CHIU HAN, and 邱翰澤. "The Study of Fire Flashover Training Simulation Cabinet." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/48902343277044445920.

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碩士<br>中華科技大學<br>土木防災工程研究所在職專班<br>102<br>It is a common phenomenon in disaster rescue a "flashover" and " deflagration " as the process of building fire developing. "Flashover" and " deflagration " are also the biggest killer in the rescue of fire. In order to reduce firefighter injuries, New Taipei City Fire Department imported the fire simulation training equipment in 1997 from the Republic of Germany. Fire simulation training equipment, with high-quality materials and superb group of instructors trained firefighters. This fire simulation training devices used powerful computing capability to

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Tang, Liang. "Modelling of HVDC wall bushing flashover due to uneven wetting." 2002. http://hdl.handle.net/1993/19778.

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Yeh, Chia Nan, and 葉家男. "Effectiveness Analysis of Mobile Water Spray System in Flashover Scenario." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/31041145350224143591.

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碩士<br>長榮大學<br>職業安全與衛生研究所<br>97<br>The heat flux gauge is used to measure the heat flux from a fire source but it is affected by the wind strength around the gauge. A correlation is developed to predict the wind effect for a heat flux measurement. A fire simulator with 12m*2.6m*2.5m dimension is developed to simulate industrial fire scenarios. The heat flux is measured with 4.1 , 3.3 , 2.1 , and 1.1 at 1m , 2 m, 3m, and 4m distance from the opening of the simulator respectively. A trainer standing at 1 m wearing fire fighting clothing would not be hurt in the training activity. Another 3m*

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Su, Mo-jie, and 蘇莫捷. "The study of menace to firemen of flashover and backdraft." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/28709003259513993352.

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碩士<br>國立雲林科技大學<br>環境與安全工程系碩士班<br>95<br>The death of firemen in the flash over and backdraft scenes are still happened nowadays. According to statistical data, the percentage of habitation buildings is the highest. Therefore, the blaze of habitation buildings is the most case that firemen need to face it. It is necessary to the advanced researches. The most two killer of blaze scene to the firemen are flash over and back draft. When the flash over happened, it full all the space of a room suddenly. Not only the suffering people but also the firemen can not be survived. On the other hand, backdr

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Chen, San-Mu, and 陳三木. "Preventive Strategies of the Lightning Flashover in Overhead Transmission Line." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/73536812197473992577.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>94<br>This thesis proposes a method to analyze the lightning flashover in overhead transmission line. During this study, three kinds of tower models are used to discuss the phenomenon of lightning flashovers. To obtain a more general inference for flashover, the variables, including tower footing resistance, lightning current, the front of the current surge, are also weighed in to research into the causes of tower’s voltage rise. Moreover, in order to prove these contentions, the 161kV overhead transmission line between the Nanke E/S and the San-Chu D/S in Tainan

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"Source Strength Impact Analysis on Insulator Flashover under Contaminated Conditions." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.39422.

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abstract: Transmission voltages worldwide are increasing to accommodate higher power transfer from power generators to load centers. Insulator dimensions cannot increase linearly with the voltage, as supporting structures become too tall and heavy. Therefore, it is necessary to optimize the insulator design considering all operating conditions including dry, wet and contaminated. In order to design insulators suitably, a better understanding of the insulator flashover is required, as it is a serious issue regarding the safe operation of power systems. However, it is not always feasible to cond

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Wu, Kuan-Yi, and 吳冠億. "The Flashover Characteristics of Insulating Insulator of Overhead Transmission Systems." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/37328877131886719228.

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碩士<br>中原大學<br>電機工程研究所<br>90<br>Insulating insulators are used for insulation of overhead transmission lines and their supporting tower for power delivery. Due to Taiwan surrounded by sea, highly developed in industry, and major power delivery equipments located along coastal areas, the insulators are frequently subjected to pollution from NaCl-fog and dust-fog, and suspended solid particles. Electric arc and flashover often occur on the contaminated insulators. The failure of the insulators usually results in blackout of either local area or whole area along the power transmission. Therefore,

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42

Chagas, Fernando A. "Flashover mechanism and laboratory evaluation of polluted insulators under DC voltage." 1997. http://hdl.handle.net/1993/19399.

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43

Chang, Han-Chan, and 張瀚展. "Effect of post-flashover flame emerging from opening on external wall." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/35732213235991055873.

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碩士<br>國立高雄第一科技大學<br>環境與安全衛生工程研究所<br>102<br>Fire spread in high rise buildings occurs if flames emerge and extend on the facade of the building to cause ignition in floors above the floor of fire origin. Considerable work has investigated the heat exposure onto the facade owing to flames emerging from a door-like opening in an enclosure. However, the heat exposure to the external facade from window-like opening locations has not been incorporated into current engineering fire design methods. In this study, experiments in small scale enclosures having various opening shapes and locations were un

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HE, SHI-NAN, and 何世南. "Study on influence of parameters for back flashover lightning surge analysis." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/27618284101806407688.

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Chen, Shin-Hong, and 陳信宏. "The Effect of Smoke Production of Material on the Occurrence of Flashover." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/60484839952219573481.

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碩士<br>國立高雄第一科技大學<br>環境與安全衛生工程所<br>94<br>ABSTRACT Flashover is a very phenomena leading to high heat release during fire growth. From previous studies, it has been investigated that heat flux of 20 kW/m2, temperature of 600 ℃ and heat release rate of 1 MW are the criteria of flashover. However, the smoke production of materials is not considered but influences the radiant heat transfer in a compartment which is related to the occurrence of flashover. Thus, this study focuses on the effect of smoke production on the occurrence of flashover by small scale experiments. The size of the experimental

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Wang, Shih-Cheng, and 王士承. "Numerical Study of Flashover Phenomena and Fire Reconstruction in the Building Fire." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/68619564992850854750.

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博士<br>元智大學<br>機械工程學系<br>96<br>Accidental building fires present considerable valuable information on fire phenomena and behavior. However, fire and smoke movement quantitative data cannot be obtained directly from a building fire accident. Therefore, computational methods have been widely used to reestablish the fire scenario and obtain a great deal of information for fire study. This paper utilized two types of fire simulation software, CFAST (ver. 6.0.10) zone model and FDS (ver. 4.0.7) field model, and full-scale fire tests for motorcycles to reconstruct a motorcycle shop fire accident in T

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CHEN, YU-HUNG, and 陳禹宏. "Research on Design Scheme of flashover simulator for Training in Fire Department." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/anm5x4.

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碩士<br>吳鳳科技大學<br>消防研究所<br>106<br>When a fire grows in a confined space, it will enter a heyday after a short period of flashover. The flame and high temperature accompanying the flashover will cause loss of life and property, and often cause a fire to be variable, regardless of the fire. Or life-saving assistance, due to the accumulation of hot smoke layers and the development of fire, increase the difficulty of disaster relief personnel in rescue and reduce the survival opportunities of trapped people. In view of this, if training can be carried out through the flashover simulator, firefighter

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Frost, Philip Edward. "Development of a Fire-induced Flashover Probability Index (FIFPI) for Eskom transmission lines." Thesis, 2012. http://hdl.handle.net/10210/4691.

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M.Sc.<br>The need for a fire-induced flashover (power line arcing to the ground) probability index for Eskom transmission (high voltage power) lines became evident soon after the installation the Advanced Fire Information System (AFIS) in 2004. AFIS is a satellite based fire detection system that utilizes polar and geostationary satellite sensors to detect fires as small as 50 m x 50 m in size. As soon as a fire is detected by either, the Terra, and Aqua Moderate Resolution Imaging Spectro-radiometer (MODIS) or Meteosat Second Generation (MSG) geostationary satellites close to any of the 28 00

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Klopovic, Suzana. "Experimental and computational study of flames venting externally during full scale flashover fires." Thesis, 1999. https://vuir.vu.edu.au/15326/.

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In this study, externally venting flames have been examined during two series of full scale flashover fires. The purpose of the work is to investigate the likelihood of external fire spread from a burn room window with standard glass, when the external facade is non-combustible. The effects on externally venting flames of internal ventilation conditions, burning rate, burn room size and wind have been studied in detail. Secondary fires and glass breakage have been examined.. Repeatable experimental data and reliable information on externally venting flames have been generated for numerical m

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Basappa, Subba Reddy. "A Novel Technique For Enhancing The Pollution Flashover Strength Of Ceramic Disc Insulators." Thesis, 2010. https://etd.iisc.ac.in/handle/2005/2114.

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Pollution is the single largest cause of transmission/distribution line outages, next to lightning, which result in expensive power outages. A major significance of the problem is that it can repeatedly occur even at normal working voltages. As a result, it has become the most detrimental factor affecting the safe operation of extra and ultra high voltage (EHV/UHV) transmission lines and substations. In reality, the phenomenon of pollution-induced flashover is a very complex, and vexatious problem that continues to challenge high voltage engineers even today. In spite of knowing this phenome

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