About: New approach to the problem of cathode wear in DC arc plasma torches

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	High heat load on the surface of electrodes in DC arc plasma torches results in strong wear of electrodes. The present work offers a new approach to compensate cathode wear in DC arc gas stabilized plasma torches by using moveable anode. With this design of torch, the distance between the cathode tip and anode can be varied. Voltage fluctuation analysis show the possibility of a reasonable arc modification by approaching the nozzle to the cathode caused by a change of the flow field inside the arc chamber and the arc dynamics. Smaller cathode tip nozzle distances result in higher arc voltage with reduced fluctuations accompanied by a positive effect on the plasma jet properties. High heat load on the surface of electrodes in DC arc plasma torches results in strong wear of electrodes. The present work offers a new approach to compensate cathode wear in DC arc gas stabilized plasma torches by using moveable anode. With this design of torch, the distance between the cathode tip and anode can be varied. Voltage fluctuation analysis show the possibility of a reasonable arc modification by approaching the nozzle to the cathode caused by a change of the flow field inside the arc chamber and the arc dynamics. Smaller cathode tip nozzle distances result in higher arc voltage with reduced fluctuations accompanied by a positive effect on the plasma jet properties. (en) V plazmatronech stejnosměrného proudu velká tepelná námaha povrchu elektrod má za následek jejích silné opotřebování. Tato práce nabízí novou možnost kompenzace následků opotřebování katody v plynových plazmatronech pomoci pohyblivé anody. V takto uzpůsobeném plazmatronu se může měnit vzdálenost mezi katodou a anodou. Analýza fluktuaci napětí ukazala přiměřenou změnu chování oblouku při přibližování anody ke katodě, vyvolánou změnou proudění v obloukové komoře a změnou dynamiky samotného oblouku. Menší mezielektrodová vzdálenost měla za následek zvýšení napětí oblouku a snížení jeho fluktuaci, což mělo pozitivní vliv na proudění plazmatu. (cs)
Title	New approach to the problem of cathode wear in DC arc plasma torches New approach to the problem of cathode wear in DC arc plasma torches (en) Nový přístup k problematice eroze katody v plazmatronech stejnosměrného proudu (cs)
skos:prefLabel	New approach to the problem of cathode wear in DC arc plasma torches New approach to the problem of cathode wear in DC arc plasma torches (en) Nový přístup k problematice eroze katody v plazmatronech stejnosměrného proudu (cs)
skos:notation	RIV/61389021:_____/08:00309128!RIV09-AV0-61389021
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(KJB100430701), Z(AV0Z20430508)
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Kavka, Tetyana
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky plazmatu AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	382495
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/08:00309128
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Plasma spraying; arc fluctuations (en)
http://linked.open.../riv/klicoveSlovo	Plasma spraying arc fluctuations
http://linked.open...ontrolniKodProRIV	[36F5F95F67D3]
http://linked.open...v/mistoKonaniAkce	Maastricht
http://linked.open...i/riv/mistoVydani	Düsseldorf
http://linked.open...i/riv/nazevZdroje	Thermal Spray Crossing Borders: conference proceedings
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Control of air entrainment process in thermal plasma jets generated by hybrid gas-water torch
http://linked.open...UplatneniVysledku	2008
http://linked.open...iv/tvurceVysledku	Kavka, Tetyana Arnold, J. Kupke, T. Schneider, G. Syed, A.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2008-06-02 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Physical and chemical processes in plasmas and theis applications
number of pages	6 (xsd:int)
http://purl.org/ne...btex#hasPublisher	DVS-Sondertagung
https://schema.org/isbn	978-3-87155-979-2
is http://linked.open...avai/riv/vysledek of	New approach to the problem of cathode wear in DC arc plasma torches New approach to the problem of cathode wear in DC arc plasma torches New approach to the problem of cathode wear in DC arc plasma torches New approach to the problem of cathode wear in DC arc plasma torches

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