Numerical Investigations on Blast Wave Attenuation by Obstacles

Combined with 5th-order WENO (Weight Essentially Non-oscillatory) scheme and immersed boundary method, blast waves passing four different obstacles are investigated numerically. Efforts have been made to understand the effect of the shape of the obstacles to the attenuation of the incident blast waves. Our numerical results clearly show that the interaction processes of the incident shock and the obstacles, the corresponding pressure histories during the interaction have been obtained. It shows that the right-faced right angled triangle has the better effects on blast wave attenuation than the left-faced right angled triangle, isosceles triangle and rectangle.