Analysis of a wall-stabilized-arc discharge with three-dimensional, non-grey radiation transport

Physics

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Arc Discharges, Radiative Transfer, Three Dimensional Flow, Enthalpy, Polynomials, Radiation Sources, Thermodynamic Equilibrium

Scientific paper

A new theoretical analysis of a wall-stabilized arc discharge is developed, used to calculate distributions of enthalpy, velocity and pressure for a wide range of arc operating conditions, and used to assess the ability of a test facility which employs such an arc as a radiation source (the NASA Langley Planetary Entry Radiation Facility) to produce a radiation intensity spectrum similar to that from the stagnation region shock layer of a planetary-return reentry vehicle. This analysis accounts for three-dimensional radiation transport within the arc and considers a nongrey, self-absorbing real gas (air) in chemical and thermodynamic equilibrium. The governing fluid mechanical equations are solved by employing a multistrip integral method with velocity and enthalpy distributions approximated by second-order polynomials.

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