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Post‐Flashover compartment fires
Fire and Materials, 1983AbstractFourteen mathematical models of post‐flashover compartment fires are classified on the basis of fourteen principal modeling aspects. Expressions are presented for the potential of fire to spread by destruction and convection. The assessment of the fire resistance requirements for the compartment boundaries is discussed and measures to counter ...
T. Z. Harmathy, J. R. Mehaffey
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Estimation of surface flashover threshold in a vacuum II: flashover phase transition
Journal of Physics D: Applied Physics, 2019Surface discharge in vacuum occurs under intense external field, also called flashover. The flashover threshold over which surface flashover occurs is of vital importance in vacuum-solid interface. It is widely assumed that flashover is initiated by single surface multipactor and develops as a plasma discharge along dielectric surface, namely secondary
Guang-Yu Sun +7 more
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Estimating room flashover potential
Fire Technology, 1980Flashover is the ultimate event in a room fire signaling the final untenability for room occupants and greatly increased hazard to other building spaces. Despite this importance, hazard evaluations of furnishings and other common fuel loads have normally not been based on estimates of flashover potential.
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Nature, 1976
THE increasing importance of vacuum insulation in technology1 and the recognition of the disruptive effects of surface discharges on satellites in space2 both impart fresh impetus to the understanding of the flashover effect. Solid insulators are certainly a source of gas in vacuo, particularly under bombardment, and can also cause local enhancement of
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THE increasing importance of vacuum insulation in technology1 and the recognition of the disruptive effects of surface discharges on satellites in space2 both impart fresh impetus to the understanding of the flashover effect. Solid insulators are certainly a source of gas in vacuo, particularly under bombardment, and can also cause local enhancement of
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Surface flashover of insulators
IEEE Transactions on Electrical Insulation, 1989The author reviews surface flashover (i.e. voltage breakdown along the surface of insulators), primarily in vacuum. He discusses theories and models relating to surface flashover and pertinent experimental results. Surface flashover of insulators in vacuum generally is initiated by the emission of electrons from the cathode triple junction (the region ...
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1996
The recent visit of Dave Hammer from NRL gave me occasion to analyse roughly the available small sample flashover data and I thought the results might be of minor interest to others. This re-analysis has been directed towards the region of interest to tube designers and concentrated on perspex (i. e.
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The recent visit of Dave Hammer from NRL gave me occasion to analyse roughly the available small sample flashover data and I thought the results might be of minor interest to others. This re-analysis has been directed towards the region of interest to tube designers and concentrated on perspex (i. e.
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Flashover Characteristics of Transformer Condenser Bushings
Transactions of the American Institute of Electrical Engineers, 1939TERMINAL bushings for high-voltage power transformers require many electrical tests to demonstrate their fitness for service. A vital part of the complete transformer, they operate under extreme variations of temperature and weather conditions. They are subject to all the variations in load, ambient temperature, and surges that the transformer windings
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Physics of pollution flashover
1988The apparent paradox in pollution flashover is that catastrophic electrical discharges are produced, spanning up to metres of air, by electrical potential differences capable, in ordinary circumstances, of being contained by air clearances of the order of a few centimetres.
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Journal of Applied Physics, 1967
Experiments on the vacuum flashover of dielectric frusta subjected to 35 and 75 nsec pulses show the strong influence of cone angle on insulation strength. A theory is presented to explain the formative process leading to flashover for one polarity. It is proposed that positive surface charge grows by emission of hot electrons during the application of
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Experiments on the vacuum flashover of dielectric frusta subjected to 35 and 75 nsec pulses show the strong influence of cone angle on insulation strength. A theory is presented to explain the formative process leading to flashover for one polarity. It is proposed that positive surface charge grows by emission of hot electrons during the application of
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Room flashover — Model studies
Fire Technology, 1972The author reports on part of the third phase of a three-phase program that is intended to provide a means for predicting flashover during fire buildup in a room. Phase 3 evaluates the effects of varying room and fire conditions using a one-eighth scale model.
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