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Title: Thermodynamic properties and transport coefficients of air thermal plasmas mixed with ablated vapors of Cu and polytetrafluoroethylene

Because the fault arc in aircraft electrical system often causes a fire, it is particularly important to analyze its energy and transfer for aircraft safety. The calculation of arc energy requires the basic parameters of the arc. This paper is mainly devoted to the calculations of equilibrium composition, thermodynamic properties (density, molar weight, enthalpy, and specific heat at constant pressure) and transport coefficients (thermal conductivity, electrical conductivity, and viscosity) of plasmas produced by a mixture of air, Cu, and polytetrafluoroethylene under the condition of local thermodynamic equilibrium. The equilibrium composition is determined by solving a system of equations around the number densities of each species. The thermodynamic properties are obtained according to the standard thermodynamic relationships. The transport coefficients are calculated using the Chapman-Enskog approximations. Results are presented in the temperature range from 3000 to 30 000 K for pressures of 0.08 and 0.1 MPa, respectively. The results are more accurate and are reliable reference data for theoretical analysis and computational simulation of the behavior of fault arc.
Authors:
;  [1] ; ;  [2]
  1. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191 (China)
  2. Department of Electrical Engineering, Tsinghua University, Beijing 100084 (China)
Publication Date:
OSTI Identifier:
22486487
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AIR; COMPUTERIZED SIMULATION; COPPER; ELECTRIC CONDUCTIVITY; ENTHALPY; HOT PLASMA; LTE; MIXTURES; POLYTETRAFLUOROETHYLENE; PRESSURE RANGE MEGA PA; SPECIFIC HEAT; TEMPERATURE RANGE OVER 4000 K; THERMAL CONDUCTIVITY; VAPORS; VISCOSITY