Abstract
Shock wave and transient flow induced by thermal release such as combustion, detonation or electric discharge are of special interest in research on combustion phenomena of gas turbines and shock wave propagation in gas laser oscillators. In MHD power generation, excessive Joule heat due to Faraday and Hall current, and abnormal phenomena such as arc discharge disturb supersonic flow in the generator. In this paper, numerical simulation of compressible flow involving thermal release is executed by means of the Euler implicit method, in which Neumann-type artificial viscosity is appended in order to calculate the behavior of physical discontinuities such as shock waves in pressurized gas. In terms of gas pressure and energy density, the Mach number of the shock wave due to arc discharge is investigated here, where the pressurized gas is argon (Ar) at room temperature. Furthermore, the behavior of the thermal wave as the boundary of the high-temperature region, which follows after a shock wave with a velocity much lower than that of the shock wave, is also clarified.
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