Original title: Measurement of excitation and ionization temperatures in an expanding H2O-Ar DC arcjet
Translated title: Měření excitačních a ionizačních teplot v expandujícím proudu H2O-Ar plazmatu
Authors: Sember, Viktor ; Mašláni, Alan
Document type: Papers
Conference/Event: XXVIII INTERNATIONAL CONFERENCE ON PHENOMENA IN IONIZED GASES, Praha (CZ), 2007-07-15 / 2007-07-20
Year: 2007
Language: eng
Abstract: [eng] [cze]
Optical emission spectroscopy is used to determine the temperature in a plasma jet expanding from the H2O-Ar dc arc torch into a chamber maintained at a pressure of 10 kPa. The excitation and rotational temperatures are derived from relative intensities of argon atomic and ionic lines, and from the UV OH band at 306.357 nm, respectively. The ionization temperature is obtained from the intensity ratio of argon ionic and atomic lines, using electron number density calculated from the Stark broadening of hydrogen H line. The structure of the plasma jet is characterized by isocontours of electron number density and intensity of atomic and ionic lines. In the expansion region, the ionic excitation temperature is found close to the ionization temperature and much higher than the excitation temperature of argon atoms, which is close to the rotational temperature of OH radical. In the normal shock region, all the measured temperatures tend to be equal. Metodami optické emisní spektroskopie určujeme teploty ve volném proudu plazmatu, který expanduje do nízkotlaké komory, ve které udržujeme konstantní tlak 10 kPa. Z měření lze odvodit excitační, ionizační, rotační a vibrační teplotu v různých místech plazmatu. V expanzní části proudu se teploty navzájem liší, naopak v oblasti rázové vlny jsou teploty téměř identické.
Keywords: optical emission spectroscopy; plasma jet; temperature
Project no.: CEZ:AV0Z20430508 (CEP), GA202/05/0669 (CEP)
Funding provider: GA ČR
Host item entry: XXVIII International Conference on Phenomena in Ionized gases. Proceedings, ISBN 978-80-87026-01-4

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0149115

Permalink: http://www.nusl.cz/ntk/nusl-37482


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Research > Institutes ASCR > Institute of Plasma Physics
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