Influence of spoiler parameters on attenuation efficiency of tunnel explosion shock wave

DOI:	10.11809/bqzbgcxb2024.07.026
Keywords:	spoiler; tunnel; explosion shock wave; shock wave attenuation; numerical simulation
Abstract:	In order to study the influence of spoiler on the over pressure propagation of explosion shock waves in the tunnel, the propagation process of explosion shock waves in the tunnel was numerically simulated. The simulation covers different numbers, spacing, sizes, angles, and arrangements of the spoiler. The feasibility of the calculation method is verified by comparing the calculation results of the over pressure theory with the simulation results. The results show that the number of spoilers has the greatest influence on the attenuation of the shock wave, after reaching a certain number, the attenuation efficiency of the explosion shock wave can be increased by 35.8%. The improvement of the spacing of the spoiler on the attenuation efficiency of the explosion shock wave is second only to the number of spoilers. When the spoiler is arranged, the coordination of the number and spacing should be given priority to avoid the rear spoiler facing the wave surface in the vortex field generated by the front spoiler. When the spoiler shock wave test is carried out, the size of the front spoiler should be reduced as much as possible, the size of the rear spoiler should be increased, the damage of the explosion shock wave to the spoiler itself should be reduced, the number of vortices in the internal flow field should be increased, and the time of the peak overpressure of the explosion shock wave can be prolonged. When the incidence angle is 70 degrees, the relative layout is better than the staggered layout; when the angle of attack is 75 degrees, the staggered layout is better than the relative layout.
Issue:	Vol. 45 No. 7 (2024)
Published:	2024-07-26
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