Thermodynamic properties and transport coefficients of high-temperature CO2 thermal plasmas mixed with C2F4. (16th November 2015)

• Record Type: Journal Article
• Authors: Yang, Aijun; Liu, Yang; Sun, Bowen; Wang, Xiaohua; Cressault, Yann; Zhong, Linlin; Rong, Mingzhe; Wu, Yi; Niu, Chunping
• Is Part Of: Journal of physics. Volume 48:Number 49(2015)
• Publication Date: 2015-11-16
• Subjects: transport properties -- thermodynamics of plasmas -- CO2–PTFE plasmas; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/48/49/495202
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: This paper is devoted to the calculation of fundamental properties of CO2 mixed with C2 F4 . The species composition and thermodynamic properties (mass density, entropy, enthalpy and specific heat at constant pressure) are based on Gibbs free energy minimization. The transport properties (electrical conductivity, viscosity and thermal conductivity) are calculated by the well-known Chapman-Enskog method. The Lennard-Jones like phenomenological potential and some recently updated transport cross sections are adopted to obtain collision integrals. The calculation is developed in the temperature range between 300 and 30 000 K, for a pressure between 1 to 16 bar and for several C2 F4 proportions. Transport coefficients for CO2 are also compared with previous published values, and the reasons for discrepancies are analyzed. The results obtained for CO2 –C2 F4 mixtures provide reliable reference data for the simulation of switching arcs in CO2 circuit breakers with the ablation of PTFE.