Comparison of effects of anode attachment and hydrodynamic instability on fluctuations of thermal plasma jet

0315864 - ÚFP 2009 GR eng A - Abstract
Chumak, Oleksiy - Kopecký, Vladimír - Kavka, Tetyana - Hrabovský, Milan
Comparison of effects of anode attachment and hydrodynamic instability on fluctuations of thermal plasma jet.
[Srovnání vlivu anodového připojení a hydrodynamickych nestabilit na fluktuace proudu plazmatu.]
HTTP-10, 10th Europen Plasma Conference, Book of Abstracts. Patras: University of Patras Plasma Technology Lab, 2008. s. 71-71. ISBN N.
[Biennial European Plasma Conference HTTP-10/10th./. 07.07.2008-11.07.2008, Patras]
R&D Projects: GA ČR GA202/08/1084
Institutional research plan: CEZ:AV0Z20430508
Keywords : plasma torch * arc * plasma jet fluctuations * anode attachment
Subject RIV: BL - Plasma and Gas Discharge Physics

Besides hydrodynamic instabilities the plasma jets generated by arc plasma troches has an additional source of strong flow disturbances. Hydrodynamic and magnetic interaction of plasma flow with an arc-anode attachment pushes the jet away from an anode surface. The anode attachment is often unstable itself and variation of its position leads to stochastic fluctuation of the plasma jet. This effect is difficult to distinguish from fluctuations arising from hydrodynamic instabilities. The plasma torch used in this work allows partial separation of these phenomena and this fact was used for study and comparison of their roles in plasma jet fluctuations.

Kromě hydrodynamických nestabilit je proud plazmatu generovaný plazmatronem z netransferovaným obloukem rušen anodovým připojením oblouku. Specifická konstrukce plazmatronu WSPH použitého při studiu dovolila částečně rozlišit vlivy těchto dvou zdrojů rušeni. V práci se srovnávají jejich vlivy na strukturu proudu plazmatu.
Permanent Link: http://hdl.handle.net/11104/0165952