Numerical and experimental study of a micro-blast wave generated by pulsed-laser beam focusing

Electromagnetic and Fluid Analysis of Collisional Plasmas

“…Jiang et al (1998) [12] has analyzed both experimentally and numerically the propagation of micro-blast waves in ambient air. The duration of the pulse was of the order of 18 ns and the total amount of energy released was measured to be 1.38 J.…”

Pulse-Laser Powered Orbital Launcher

“…In the performance modeling using our CFD analyses, the blast wave is driven by a pressurized explosion source with η bw =0.43, whose radius is 1 mm and density is equal to that in the ambient atmosphere. Such an explosion source method (Steiner et al, 1998;Jiang et al, 1998;Liang et al, 2001; is familiar to simulate blast wave propagation whose time scale is much longer than that of energy input process. Measured and computed (Katsurayama et al, 2008) propagation of a blast wave in free space are compared to validate the blast wave reproducibility of this explosion source.…”

Laser Extinguishment of CH4-N2/Air Counterflow Diffusion Flame

“…10 Radial profiles of laser extinguishment limits breakdown propagate while decaying from the breakdown point to the surroundings. The induced flow velocity behind a blast wavefront also decreases with propagation of the blast wave (8), (10), (12) . By investigating the spatial profiles of X f ex and X f in on the stagnation streamline as a function of the distance from the breakdown point to the flame surface, z r = z b − z f , the influence of the blast wave on X f ex and X f in can be clarified.…”

“…The plasma core expands supersonically (1) and drives the blast wave (3) - (8) . The blast wave propagates into the surrounding undisturbed gas while inducing a high-speed flow behind its wavefront (8), (12) . This phenomenon is well known as laserinduced breakdown.…”