COMPARATIVE INVESTIGATION OF THE MULTIGROUP OPTICAL MODELS FOR THE RADIATION CHARACTERISTICS PREDICTION IN THE ARC AND LASER PLASMA GENERATORS

摘要

Several multigroup models (two-, seven-, thirty-seven group models) of optical properties of low-temperature air plasma have been developed and investigated. Some of these models, namely seven- and thirty-seven group models, can be recommended for use in radiative-gasdynamic codes for prediction radiation characteristics of low-temperature plasma. It has been shown that using of the two-group optical models results in significant errors in distributions of radiative heat transfer characteristics. Statement of the problem about radiative gas dynamics of the Laser Plasma Generator has been presented. It has been shown that air plasma in this kind of plasma generators can be heated up to ～20000 R at atmospheric pressure, and that taking into account radiative gas dynamic interaction is very significant for prediction thermo-gasdynamic parameters of such kind of plasma generators.