摘要
为了研究同心筒水下热发射过程中筒口气泡变化规律,采用三维多相流模型对发射过程进行了模拟。研究表明,同心筒结构应用于水下发射时筒口气泡受到弹体表面黏性力、气流附壁效应以及两相互相作用过程影响,筒口气泡的形态会经历3个典型阶段,筒口附近的压强和速度受气泡运动和发展影响而振荡变化。研究的结果在水下发射技术的发展上具有一定的理论意义和工程应用价值。
In order to study the development change rule of bubble in tube opening during underwater launching process using concentric canister structure,three-dimensional multiphase flow model was used to simulate the process of launching. The results indicate that when concentric tube structure is applied to the underwater launch,bubbles at concentric tube edge are affected by projectile surface viscous force,airflow coanda effect and the above two phase’s process between each other,and the shape of jet bubble experi-enced three typical forms. Pressure and velocity inside the bubbles oscillated and changed for the motion and development of bubble. Results of this study have theoretical significance and engineering value in the development of underwater launch technology.
出处
《四川兵工学报》
CAS
2015年第11期26-28 64,64,共4页
Journal of Sichuan Ordnance
基金
国家自然科学基金(51306019)
关键词
同心筒
多相流
数值模拟
动网格
concentric canister launcher
multiphase flow
numerical simulation
dynamic mesh
