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坦克射击后出现炮膛内壁烧蚀及身管温度上升等问题,其首要因素为火药爆炸燃烧所产生的高温气体。应用内弹道零维模型,以空间平均热力学参数描述坦克射击过程中炮膛内弹道状态,采用四阶龙格-库塔法求解内弹道常微分方程组,计算出内弹道时期火药气体的压力、流速和温度等随时间的变化规律。应用指数函数拟合出后效期炮膛内火药气体温度公式,最后得到坦克整个射击过程中炮膛内火药气体温度的变化规律。通过计算结果与试验数据的对比,验证了计算结果的合理性。此计算结果可为坦克炮身管的烧蚀、热状况及红外辐射特性的研究提供理论依据。
After tank shooting, there appeared problems such as the ablation of the inner wall of the barrel and the rise of the temperature of the barrel, and the most important factor was the hot gas generated by the explosion and combustion of the powder. The internal trajectory zero-dimensional model was used to describe the interior ballistic trajectory of the tank during shooting. The fourth-order Runge-Kutta method was used to solve the interior ballistic differential equations. The pressure and velocity of the propellant gas during the internal ballistics were calculated. And temperature changes with time. The exponential function was used to fit the formula of gunpowder gas temperature in the post-gunnery chamber. Finally, the variation of Gunpipe gas temperature in the gunnery was obtained. By comparing the calculated results with the experimental data, the rationality of the calculation results is verified. The result of this calculation can provide a theoretical basis for the research of ablation, thermal condition and infrared radiation of tank barrel.