中文摘要：

常规火炮威力的提高会增加自身重量,严重影响火炮机动性,且巨大的后坐冲量会使炮身失稳,不利于射击精度。减轻火炮自重,提高火炮的射击精度和机动性,运用新型膨胀波技术,以122自行火炮为基础,设计出前置式膨胀波火炮后喷装置的基本结构。建立后喷装置模型,利用Fluent软件燃气后喷过程进行仿真,通过分析影响前置式膨胀波火炮后喷装置的几个关键参数,后喷装置与身管的连接位置、后喷装置进出口面积及后喷装置与身管法线的连接角度,对后喷装置结构进行优化,确定出122 mm前置式膨胀波火炮后喷装置的最佳结构。

英文摘要：

The improvement of conventional artillery＇s power would increase its weight and reduce its maneuverability. The huge recoil impulse can make artillery instability and take negative effects of the firing accuracy. We used the new expansion wave technology based on the 122 self-propelled artillery. We also designed the device of front-expansion wave artillery after the basic structure. We set up after spraying device model and used the Fluent software to simulate the process of gas injection. By analyzed the key parameters of the front-expansion wave cannon artillery after the basic structure, the after spray equipment import and export area and the after spray device connected to the body tube normal point of view, we optimized the structure of after spraying device, then determined the best structure of the 122 self-propelled artillery＇s after the spray device.