## 3 Analysis of Results and Discussion
### Analysis of the Effect of Air Baffles on Explosion Shock Wave Propagation
#### 3.2.1 Time Variation of Overpressure at the Top and Middle of the Gas Chamber without Baffles
baffle to form a reflected wave, the reflected wave propagates in the opposite direction, and is superimposed with the shock wave, resulting in a surge of overpressure on the wall of the baffle and the top wall of the nearby gas cabin; the shock wave below 3.3 m continues to propagate to the right, and the pre-driven shock wave changes from a plane wave to a curved wave, resulting in increased flow disturbance, turbulence, and pressure near 3.3 m, especially at the bottom of the gas baffle. The reflected wave of the foreshock meets the subsequent compressional wave at the front of the baffle, and the superposition causes a sudden jump in the overpressure value, which then continues to propagate in their respective directions. The cloud diagram shows multiple overpressure regions propagating in front of and behind the baffle. By comparing the overpressure variation curves under different working conditions in Figure 13, it is found that the overpressure variation law with time is basically the same as that of the working condition without a baffle. After the installation of the gas baffle, the number of jagged protrusions in the drop curve of each monitoring point of group 2 after reaching the peak overpressure increases as the distance between the gas baffles decreases, as shown in Figure 11b compared with the curve of the G2-10 m monitoring point in Figure 13a. When there is no baffle, the curve of G2-10 m is smooth after 0.05 s, compared to the 30 m baffle spacing, where there are obvious jagged protrusions during the descent of G2-10 m after 0.05 s. This is related to the wall reflection of the shock wave, the additional baffle case, the shock wave in the process of propagation, part of the shock wave is reflected by the top baffle wall, the formation of small strands of reflected waves to the opposite direction of propagation through the monitoring point, the formation of the descent process jagged protrusion, and with the reduction of the baffle spacing, the number of protrusions increased significantly. This indicates that the installation of additional gas baffles has a certain influence on the propagation of shock waves in the middle of the gas cabin. There is an increase in the airflow disturbance in the gas cabin, and as the distance between the gas baffles becomes smaller, this disturbance increases, which has a certain inhibiting effect on the propagation of shock waves in the middle of the gas cabin. The first overpressure peak and the second peak at the monitoring point of G2-190 m both decrease with the distance between the gas baffles, and the overall trend is decreasing, which indicates that the installation of additional gas baffles has a certain inhibiting effect on the propagation of shock waves in the middle of the gas cabin. This indicates that the installation of additional baffles has a certain effect on the suppression of shock wave propagation in the gas cabin. Figure 12: Overpressure cloud image of the baffle and the wall of the gas cabin when the spacing is 70 m.  
Figure 14 shows the variation curve of overpressure at the top of the gas cabin under different baffle spacings. As can be seen from Figure 14, the baffle plate has a great influence on the overpressure change at the top of the gas cabin, but the general rule is basically the same: the monitoring points at the baffle plate cause the surge of the overpressure peak due to the superposition of reflection; the overpressure curve of the other monitoring points fluctuates repeatedly and gradually decreases with the increase in time in a zigzagged shape, and then spreads to the opposite direction after being reflected by the fire door. By comparing the variation curve of overpressure at the baffle under different working conditions, it is found that: the overpressure peak generated at the top of the gas cabin will increase with a decrease in the baffle spacing, and the baffle has a certain effect on inhibiting the shock wave propagation at the top of the gas cabin.