双孔式拉瓦尔喷管减后坐结构效能分析  

Performance Analysis of Two-hole Recoilless Structure With Laval Nozzles

作　　者：咸东鹏[1] 廖振强[1] 李洪强[1] 李佳圣[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《弹道学报》2013年第1期99-102,共4页Journal of Ballistics

摘　　要：为了深入研究拉瓦尔喷管减后坐结构,提出了一种新的拉瓦尔喷管减后坐结构———双孔式拉瓦尔喷管减后坐结构,利用一维两相流理论建立其发射过程动力学模型,以某航炮为研究对象进行数值仿真计算,分析了2个导气孔之间的距离对弹丸速度和减后坐效率的影响,并将其与单孔喷管前置式减后坐技术进行对比分析。计算结果表明,较之单孔喷管前置式减后坐结构,该方案在弹丸初速下降较小的情况下,最佳减后坐效率高达32.85%。In order to study recoilless structures with laval nozzles, a new technical structure was designed,which was two-hole recoilless structure with laval nozzles. The dynamic model of launching process was established by one-dimension two-phase-flow theory. Taking 23 mm test gun as research object, numerical simulation was carried out, and the influence of the distance between the two holes on the muzzle velocity of projectile and the efficiency of reducing recoil force were analyzed. The numerical simulation results were compared with the single-hole {ront-nozzle structure. Compared with the singlehole front nozzle structure,the best efficiency of reducing recoil force reaches 32.85 %, while the muzzle velocity of projectile don＇t reduce significantly.

关 键 词：拉瓦尔喷管 减后坐 数值仿真 两相流 初速 

分 类 号：TJ25[兵器科学与技术—武器系统与运用工程]