The noise created when a firearm is fired has a lot of adverse effects on humans and the environment, so analyzing and attenuating this noise is essential. This study aimed to examine propellant flow and the sound generated by this flow using a hybrid computational fluid dynamics and computational aeroacoustics method. The compatibility of this numerical study was also validated by comparing it with the experimental result. The impact of critical parameters, such as the shape and number of baffles of the suppressor, was studied. Finally, the overpressure and acoustics results of different suppressors were compared with each other and with the unsuppressed condition. According to the result, the suppressor with curved baffles shows a better performance. When the exit pressure at the tip of suppressor compared to the initial inlet pressure to the suppressor the percentage drop in overpressure was 76.01%, 78.79% and 81.3% for the suppressor with one, three and five curved baffles, respectively. For condition without suppressor, 169.49$$dB of SPL was recorded. When using a suppressor without a baffle, this value was reduced to 162.13$$dB. For the suppressor with one, three and five curved baffles, the SPL value was 160.234$$dB, 159.43$$dB and 158.11$$dB, respectively. Generally, this study shows that the suppressor’s efficiency is directly proportional to its shape and number of baffles.

枪支射击时产生的噪音对人类和环境有很多不利影响，因此分析和减弱这种噪音至关重要。本研究旨在使用混合计算流体动力学和计算气动声学方法来检查推进剂流动以及该流动产生的声音。通过与实验结果的比较，也验证了该数值研究的兼容性。研究了抑制器挡板的形状和数量等关键参数的影响。最后，对不同抑制器的超压和声学结果进行了相互比较以及与未抑制条件下的比较。结果表明，带有弧形挡板的抑制器表现出更好的性能。当抑制器尖端的出口压力与抑制器的初始入口压力相比时，具有 1 个、3 个和 5 个弯曲挡板的抑制器的过压百分比下降分别为 76.01%、78.79% 和 81.3%。对于没有抑制器的情况，169.49$$记录 SPL 的 dB。当使用不带挡板的抑制器时，该值降低至 162.13$$D b。对于具有 1 个、3 个和 5 个弯曲挡板的抑制器，SPL 值为 160.234$$分贝，159.43$$分贝和158.11$$分别为 dB。一般来说，这项研究表明抑制器的效率与其形状和挡板数量成正比。