Title :
Superheat turbulence in gas discharged plasma
Author_Institution :
Moscow Aviation Inst., Russia
fDate :
12/1/1993 12:00:00 AM
Abstract :
The influence of the electron concentration and temperature fluctuations on local thermodynamic equilibrium (LTE) in a gas-discharge plasma due to superheat turbulence development is analyzed. Data for the noble-gas atmospheric plasmas Ar and He (T=6-18 kK) and air ( T=4-9 kK) are given. It is shown that superheat turbulence causes deviation from LTE when parameter-space gradients are absent. As a result, the influence of superheat turbulence for weakly radiative gases (He, H2) is considerably greater than for strong radiative gases (Ar, Xe, etc). The artificial excitement of superheat turbulence in plasma without any current by means of external electric field fluctuations is demonstrated
Keywords :
discharges (electric); plasma transport processes; plasma turbulence; Ar; H2; He; Xe; electron concentration; external electric field fluctuations; gas-discharge plasma; inert gas; local thermodynamic equilibrium; noble-gas atmospheric plasmas; parameter-space gradients; strong radiative gases; superheat turbulence; temperature fluctuations; weakly radiative gases; Argon; Electrons; Fluctuations; Frequency; Gases; Helium; Plasma properties; Plasma temperature; Space heating; Viscosity;
Journal_Title :
Plasma Science, IEEE Transactions on
