In order to explore the explosion characteristics of hydrogen-air premixed mixtures and to characterize the damaging effect of the explosion shock wave on the surrounding structures, a closed straight detonation pipeline is designed and applied to simulate a confined space in this study. The inner diameter of the designed pipeline is 6.4 m long and 125 mm wide. The results show that the maximum flame speed of the most combustible premixed gases usually occurs near the equivalent ratio of 1 (hydrogen volume concentration is 29.6%). However, because of the influence of Graham’s law in chemical reaction kinetics, the maximum flame speed of hydrogen/air premixed gas appears near the equivalent ratio of 1.5 (hydrogen volume concentration is 39.6%). At this concentration, the maximum flame propagation speed reaches 1810 m/s and the pressure peak reaches 1.53 MPa. The elbow structure has a significant effect on the explosion flame. The explosion pressure and flame propagation velocity drop sharply when the premixed gas enters the bend. The explosion pressure is reduced by 11.3% and the flame propagation velocity is reduced by 66.59%. However, the velocity of flame propagation increases by a maximum of 34.41%, and the explosion pressure increases by a maximum of 26.1% when the premixed gas passes the turning point of the elbow. The thin-wall strain response of the pipeline is in good agreement with the explosion pressure.

为了探索氢-空气预混混合物的爆炸特性并表征爆炸冲击波对周围结构的破坏作用，设计了封闭的直爆管，并在其中模拟了密闭空间。设计管道的内径为6.4 m长和125 mm宽。结果表明，最易燃的预混合气体的最大火焰速度通常在当量比1（氢体积浓度为29.6％）附近发生。但是，由于格雷厄姆定律对化学反应动力学的影响，氢气/空气预混合气体的最大火焰速度出现在当量比1.5附近（氢气体积浓度为39.6％）。在这个浓度下 最大火焰传播速度达到1810 m / s，压力峰值达到1.53 MPa。弯头结构对爆炸火焰有重大影响。当预混合气体进入弯头时，爆炸压力和火焰传播速度急剧下降。爆炸压力降低了11.3％，火焰传播速度降低了66.59％。但是，当预混合气体通过弯头的拐点时，火焰传播的速度最多增加34.41％，爆炸压力最多增加26.1％。管道的薄壁应变响应与爆炸压力良好吻合。爆炸压力降低了11.3％，火焰传播速度降低了66.59％。但是，当预混合气体通过弯头的拐点时，火焰传播的速度最多增加34.41％，爆炸压力最多增加26.1％。管道的薄壁应变响应与爆炸压力良好吻合。爆炸压力降低了11.3％，火焰传播速度降低了66.59％。但是，当预混合气体通过弯头的转折点时，火焰传播的速度最多增加34.41％，爆炸压力最多增加26.1％。管道的薄壁应变响应与爆炸压力良好吻合。