摘要
为了提高火炮身管热安全性,基于两相流气固燃烧模型和身管传热模型,研究了火炮身管在射击期间温度变化规律。采用双欧拉两相流模型对火炮药室内的火药燃烧过程进行了建模及求解,给出了药室内高温燃气的温度、速度及压力等参数的变化规律,为身管传热模型提供边界条件,结合管内湍流换热模型,通过有限差分方法求解火炮身管传热过程。研究结果表明:火炮药室内燃气温度高达2000 K,大致呈均匀分布,而燃速最大达到800 m/s,呈线性分布;内壁温度最高达到1300 K左右,且内弹道时间持续20 ms左右,在弹丸起始处附近形成热点,为身管热安全危险点。研究结果可为身管热安全性提供指导,对身管烧蚀研究具有借鉴价值。
To improve the thermal safety of gun barrels,gun barrel temperature histories were investigated based on two-phase gas and solid combustion model and gun barrel heat transfer model.The propellant combustion process in the gun chamber was modeled by Euler-Euler two-phase model,and predicted the variation of gas temperature,velocity and pressure in the chamber,which serves as boundary conditions for the gun barrel heat transfer model.Combined with the turbulent convective heat transfer empirical correlation and finite difference method,the gun barrel heat transfer process was investigated.Results show that the gas temperature in the gun chamber can reach 2000 K and is nearly uniformly distributed while the velocity can reach 800 m/s and is linearly distributed.The maximum temperature along the gun barrel interior wall can reach 1300 K and last for a very short time(20 ms).A hot pot area will form near the origin of the projectile and this is the thermal dangerous point for the gun barrel.This work could provide guidelines for the gun barrel thermal safety analysis and essential theories for the erosion of the gun barrel.
作者
孙玉佳
张小兵
SUN Yujia;ZHANG Xiaobing(School of Atmospheric Physics,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《兵器装备工程学报》
CAS
CSCD
北大核心
2022年第7期115-120,共6页
Journal of Ordnance Equipment Engineering
关键词
火炮
身管
热安全
内弹道
两相流
gun
barrel
thermal safety
interior ballistics
two-phase flow
