Numerical Analysis on Thermal Non-equilibrium and Multidimensional Laser-Supported Detonation Wave Propagating through a Diatomic Gas

Abstract

A scheme of numerical analyses available for the LSD wave has been constructed. As a typical analysis model, which is expected to realize the laser propulsion systems, axisymmetric-nozzle-geometry is applied. In the numerical analyses on LSD, especially, laser absorption model and thermal-nonequilibrium model are very important to describe physically detail processes. For thermal-nonequilibrium model, 2-temperature (heavy particle's temperature and electron temperature) model has been applied because the electronic mode is firstly excited in laser absorption and a thermal non-equilibrium state easily arises. In this paper, attention is paid for the numerical method for LSD waves propagating through a diatomic gas: hydrogen, nitrogen or oxygen, which is the representation of the gases existing in the nature and is expected to have an economical advantage for a propellant.