Abstract
As a preliminary study for the laser cutoff modeling on the laser supported detonation (LSD), we investigated the gird resolution dependency of 1-D computational fluid dynamics analyses of complete and incomplete air LSD. As a result, the grid convergences of maximum physical values behind the laser absorption layer front were unattainable in the present investigation range of the grid width. In the complete LSD case, this reason is that the finer grid results in the stronger isochoric heating because the grid width is still too large to resolve the laser absorption length. On the other hand, in the incomplete LSD case, if we use more finer grid, the grid convergence will be
attainable because the present gird width is much larger than the absorption length. Moreover, the computation found that the LSD propagation speed has no grid resolution dependency because the pressure behind the laser absorption layer is independent of the grid resolution.
