为研究多孔碳化硅在氢动力船舶中对氢气爆燃事故的抑制效果及机理，搭建了可燃气体半开敞抑爆实验平台，通过改变多孔碳化硅的放置位置、孔径及当量比等参数探究其抑制氢空气预混气体爆燃的效果，并结合数值模拟分析其抑爆机理。结果表明：多孔碳化硅对氢气空气爆燃的抑制作用机制包括吸热降温、火焰淬熄及超压衰减。然而，多孔碳化硅也会对未燃气体产生扰动，导致火焰形态变形，从而加剧爆燃反应。在相同孔径和当量比条件下，材料距离点火源较近时，抑制效果显著，因为火焰到达多孔碳化硅表面时，两侧的压差较小，从而降低了火焰在孔道中的流动速度，进而中断了能量传递并使火焰熄灭。在氢空气当量比为0.4、距离点火源110 mm工况时，40 PPI和50 PPI的多孔碳化硅均能有效抑制氢气火焰传播，火焰速度峰值分别降低5.2 m/s和12.5 m/s，超压峰值的衰减率分别为26.5%和7.2%；在距离点火源220 mm工况时，50 PPI孔径的碳化硅可有效淬熄大部分火焰，火焰速度和超压峰值分别降低10.5%和13.9%；在距离增至330 mm时，三种孔径的碳化硅均无法有效阻止火焰传播，相反，由于对火焰锋面的破坏作用，导致爆燃反应更加剧烈。不同当量比下，燃烧的能量释放和反应速率存在差异，这也会直接影响多孔碳化硅的抑爆效果，当量比降至0.3时，多孔碳化硅的抑爆效果增强；当量比提高至0.5时，能量释放增加，导致碳化硅的抑制效果减弱。

To study the suppression effect and mechanism of porous silicon carbide on hydrogen explosion accidents in hydrogen-powered ships, a semi-open combustible gas suppression experimental platform was built. By changing the placement position, pore size, and equivalence ratio of porous silicon carbide, the effect of suppressing hydrogen-air premixed gas explosion was explored, and the explosion suppression mechanism was analyzed by numerical simulation. Results show that the suppression mechanism of porous silicon carbide on hydrogen-air deflagration includes heat absorption and cooling, flame quenching, and overpressure attenuation. However, porous silicon carbide can also disturb the unburned gas, causing deformation of the flame shape, thereby intensifying the deflagration. Under the same pore size and equivalence ratio conditions, the suppression effect is significant when the material is close to the ignition source, because when the flame reaches the surface of porous silicon carbide, the pressure difference on both sides is small, thereby reducing the flow velocity of the flame in the pore, interrupting energy transfer and extinguishing the flame. When the hydrogen-air equivalence ratio is 0.4 and the distance from the ignition source is 110 mm, porous silicon carbide with 40 PPI and 50 PPI can effectively suppress hydrogen flame propagation, and the peak flame velocity is reduced by 5.2 m/s and 12.5 m/s, respectively, and the attenuation rate of overpressure peak is 26.5% and 7.2%, respectively. At a distance of 220 mm from the ignition source, porous silicon carbide with 50 PPI can effectively extinguish most flames, reducing flame speed and peak overpressure by 10.5% and 13.9%, respectively. When the distance increases to 330 mm, the three types of porous silicon carbide pore sizes can not effectively prevent flame propagation. On the contrary, due to their destructive effect on the flame front, the detonation reaction became more intense. Under different equivalence ratios, differences in energy release and reaction rates directly affect the suppression effect of porous silicon carbide, when the equivalence ratio drops to 0.3, the explosion suppression effect of porous silicon carbide is enhanced, and when the equivalence ratio is increased to 0.5, the energy release increases, leading to weakening of the suppression effect of porous silicon carbide.