Home > Search Results: "Symposium on Physics of Switching Arc /18./"
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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Prostorové rozložení oscilací v modulovaném proudu plazmatu
 Gruber, Jan ; Šonský, Jiří
Electric current in a vertically oriented DC plasma torch was modulated with frequencies varying in the range 15 Hz ? 7.5 kHz. Resulting plasma jet optical radiation was recorded by the high-speed CCD camera. The length of the record and the time resolution were sufficient for the application of the FFT yielding a detailed view of the oscillation phenomena in the plasma flow. Significant oscillations were identified and their distributions in the jet plane examined. In this work we show influence of current modulation on the dominant frequencies of oscillations and their spatial distributions.
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Vliv nestabilit na určení střední teploty ve volném proudu termického plazmatu
 Hlína, Jan ; Šonský, Jiří ; Šlechta, Jiří
We have used results acquired by a multi-directional optical system for temperature measurements with a high temporal resolution to compare mean temperatures in the jet obtained by averaging the instantaneous temperature fields with the temperature values acquired in the usual way from averaged radiation intensities. The comparison shows differences in results yielded by both methods which are caused by the nonlinear dependence of radiation intensity on temperature.
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