Underwater pulsed arc discharge is a promising method for the inactivation of sewage microorganisms. Strong pressure wave plays an important role in the deactivation process. Researchers have conducted numerous studies on it, but there has not been a comprehensive study on its propagation in specific reactor. To achieve the industrial application of underwater pulsed arc discharge on sewage disinfection, this article has conducted a detailed study on the propagation of pressure wave in a cylindrical reactor based on experiments and numerical simulations. Several important conclusions are obtained through experiments. The pressure wave consists of three initial pulses generated by the cavity and their reflected waves. It spreads in the reactor at an average speed of 1655 m/s. The attenuation coefficient of the first initial pressure amplitude is 0.65 as the propagation distance increases. In addition, the maximum pressure amplitude decreases with increasing propagation distance, the attenuation coefficient of which is 0.93. The maximum pressure amplitude is always greater than 1.04 times the first maximum pressure amplitude. The following conclusion is obtained by simulation. When the propagation distance is 370 mm, the diameter of the reactor is reduced by 1/2, and the first maximum pressure amplitude will increase by 2.1 times. These results help further understand the distribution of pressure wave in the reactor and provide better guidance for the design of reactor.

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水下脉冲电弧放电在圆柱反应堆中产生的压力波传播特性

水下脉冲电弧放电是一种使污水中的微生物失活的有前途的方法。强烈的压力波在失活过程中起着重要作用。研究人员对此进行了许多研究，但尚未对其在特定反应堆中的传播进行全面的研究。为了实现水下脉冲电弧放电在污水消毒中的工业应用，本文基于实验和数值模拟对圆柱反应器中压力波的传播进行了详细的研究。通过实验得出了几个重要的结论。压力波由空腔产生的三个初始脉冲及其反射波组成。它以1655 m / s的平均速度在反应堆中扩散。第一初始压力幅度的衰减系数为0。当传播距离增加时为65。此外，最大压力幅值随传播距离的增加而减小，其衰减系数为0.93。最大压力幅值始终大于第一最大压力幅值的1.04倍。通过仿真得出以下结论。当传播距离为370 mm时，反应器的直径减小1/2，并且第一最大压力幅值将增大2.1倍。这些结果有助于进一步了解反应堆中压力波的分布，并为反应堆的设计提供更好的指导。最大压力幅值始终大于第一最大压力幅值的1.04倍。通过仿真得出以下结论。当传播距离为370 mm时，反应器的直径减小1/2，并且第一最大压力幅值将增大2.1倍。这些结果有助于进一步了解反应堆中压力波的分布，并为反应堆的设计提供更好的指导。最大压力幅值始终大于第一最大压力幅值的1.04倍。通过仿真得出以下结论。当传播距离为370 mm时，反应器的直径减小1/2，并且第一最大压力幅值将增大2.1倍。这些结果有助于进一步了解反应堆中压力波的分布，并为反应堆的设计提供更好的指导。