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National Repository of Grey Literature 13 records found  previous11 - 13  jump to record: Search took 0.01 seconds. 
3D modelování míchání proudu vodního plazmatu s vodní atmosférou v termickém plasmovém reaktoru
 Hirka, Ivan ; Rozum, O. ; Hrabovský, Milan
Three-dimensional CFD modelling of mixing of steam plasma jet with atmosphere in thermal plasma reactor has been carried out. Standard and RNG k- models and k- model were used for all simulations. Steam plasma and steam atmospheric properties were generated by the ADEP code. Results for temperature, velocity and density distributions are discussed and presented as images obtained from the FLUENT code, for currently used reactor geometry setup and plasma flow.
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Strukturní závislost fotokatalytických vlastností oxidu wolframového
 Domlátil, J. ; Brožek, Vlastimil ; Janča, J. ; Eliáš, M.
By decomposition of ammonia paratungstate in a radiofrequency generated oxygen or argon plasma, a series of specimens with the following stoichiometry were prepared: WO3, WO2.98, WO2.90 and WO2.82. The product structure was characterized by X-ray diffraction, oxygen content by the fussion extraction method (LECO) and TGA. Photocatalytic activity was determined by measuring the color change of spectrophotometric indicators.
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Vodní a hybridní plazmatrony s plynovou a vodní stabilizací
 Hrabovský, Milan
Plasma torches with water-stabilized arc (Gerdien arc) are utilized in plasma processing for specific applications. In water-stabilized torches an oxygen-hydrogen plasma jet is produced. The torches are characterized by very low mass flow rates and high power. Plasma enthalpy is thus several times higher than enthalpy of plasmas generated in gas-stabilized torches. High enthalpy is accompanied by very low plasma density. Also other plasma parameters substantially differ from the ones in gas torches. New type of plasma torch with combined stabilization of an electric arc by water vortex and gas flow was investigated. This hybrid water/gas stabilization offers possibility of adjustment of plasma jet parameters in a wide range from high enthalpy, low density plasmas typical for liquid stabilized torches to lower enthalpy, higher density plasmas generated in gas stabilized torches.
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National Repository of Grey Literature : 13 records found   previous11 - 13  jump to record:
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