Air guns can be used for seabed resource exploration, shock testing of naval vessels, polar ice breaking, etc. The study of air-gun bubble pulsation and near-field pressure is of great significance. In order to analyze the dynamic behavior and pressure characteristics of air gun bubble in detail and quantitatively, this study used the finite volume and volume of fluid methods to establish a compressible, three-dimensional air-gun bubble model in OpenFOAM (Open Field Operation and Manipulation). The characteristics of air-gun bubble pulsation and the surrounding flow-field pressures produced using various opening areas and forms were investigated. The maximum horizontal bubble displacement, main primary pulse, and bubble pulse were analyzed quantitatively. When the air-gun opening area was small, the bubble expansion time was short and the collapse time was long. The bubble surface was mostly smooth during the first bubble pulsation cycle. The bubble was nearly spherical when at its maximum volume. When collapse was nearly complete, an annular jet formed in the annular-opening air gun bubble, and four jets were formed from the four-opening air-gun bubble. The system with the largest air-gun opening area had the largest pressure wave primary pulse.

气枪可用于海底资源勘探，舰船冲击试验，极地破冰等。气枪气泡脉动和近场压力研究具有重要意义。为了详细定量地分析气枪气泡的动态行为和压力特性，本研究使用有限体积和流体体积方法在OpenFOAM（Open Field Operation and OpenFOAM）中建立了可压缩的三维气枪气泡模型。操作）。研究了气枪气泡脉动的特性以及使用各种开口面积和形式产生的周围流场压力。定量分析了最大水平气泡位移，主一次脉冲和气泡脉冲。当气枪开口面积小时，气泡膨胀时间短而崩溃时间长。在第一个气泡脉动周期中，气泡表面大部分是光滑的。当气泡达到最大体积时，它几乎是球形的。当坍塌几乎完成时，在环形开口的气枪气泡中形成一个环形射流，由四个开口的气枪气泡形成四个射流。气枪开孔面积最大的系统具有最大的压力波主脉冲。