单模块装药膛内流场特性试验及数值仿真  

Experiment and Simulation of Flow Field Characteristics for Single Modular Artillery Charge System

作　　者：马天一 陶如意[1] 森思义 王浩[1] MA Tian-yi;TAO Ru-yi;SEN Si-yi;WANG Hao(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《含能材料》2023年第1期70-82,共13页Chinese Journal of Energetic Materials

摘　　要：模块装药是目前大口径加榴炮主要的装药结构之一。为了更加精确地研究单模块装药膛内燃烧的内弹道特性,分析膛内燃气流动及压力波变化规律,设计了模块装药燃烧模拟试验平台,并进行了单模块装药的膛内燃烧试验。根据模块装药的特点,分区域建立了模块装药轴对称二维两相流内弹道模型。基于高阶精度MUSCL(Monotonic Upstream⁃centered Scheme for Conservation Laws)格式,数值模拟了单模块装药药室内部点传火过程。结果表明,计算结果与试验结果吻合较好,不同测试点的压力曲线的计算峰值误差均低于4%,表明所建立数学模型和使用的计算方法能够较好地描述单模块装药药室内部燃烧过程。结果还发现,在t=5.0 ms前,由于模块未破裂,药盒端盖的阻隔导致主装药燃气无法及时向药室扩散,仅传火管燃气对膛内流场造成微弱的影响,这一时期药室内部压力最大值比传火管右端未破膜前仅上升约4.3%;当模块破裂后,模块与药室边界处存在3.05 MPa的压力梯度,使得火药燃气及固相颗粒沿轴向快速向药室自由空间流动,在弹丸底部区域形成较强反射压力波;随着时间的推移,压力波反复震荡,并逐渐减弱。Modular artillery charge system(MACS)is one of the main charge structures for large⁃caliber howitzers.To accurately study the interior ballistic characteristics of single modular artillery charge system and analyze the variation law of gas flow and pressure wave in the chamber,a combustion experiment platform for MACS was designed to carry out the combustion experi⁃ment of single modular artillery charge system.According to the characteristics of modular artillery charge system,the axisym⁃metric two⁃dimensional two⁃phase flow interior ballistic model of modular charge was constructed in different regions.Based on the high⁃order accurate Monotonic Upstream⁃centered Scheme for Conservation Laws(MUSCL),the numerical simulation of the ignition process of single⁃module charge was carried out.The results show that the calculated results are in good agreement with the experimental results.The calculated maixmum errors of the pressures at different test points are less than 4%,indicating that the mathematical model established and calculation method used can describe the combustion process of single modular ar⁃tillery charge system well.The results also show that before t=5.0 ms,the combustion of the module cartridge has little effect on the internal flow field of the module.The gas of main propellant can′t diffuse into the charge chamber in time due to the obstruc⁃tion of the end cover of the cartridge.Only the gas of the ignition tube has a certain effect on the flow field in the chamber.The maximum pressure in the chamber during this period is about 4.3%higher than that before the right end of the fire tube is not broken.After the rupture of the cartridge,there is a pressure difference of 3.05 MPa at the boundary between the cartridge and the chamber,so that the propellant gas and solid particles flow rapidly along the axial direction to the free space of the chamber.A strong reflection of the pressure wave is formed at the bottom of the projectile.After that,the pressure wave oscillates repeated

关 键 词：模块装药 数值模拟 两相流 内弹道 MUSCL格式 

分 类 号：TJ012.1[兵器科学与技术—兵器发射理论与技术] O359[理学—流体力学]