坦克射击过程中炮膛内火药气体温度计算

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，采用四阶龙格一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。

Calculation of Powder Gas Temperature in Tank Gun Bore during Firing

There are some problems after tank firing, such as gun bore erosion and gun barrel temperature increasing. The primary reason is the high temperature gases caused by the powder explosion burning. By means of a zero-dimensional interior ballistic model, this paper describes interior ballistic states in tank gun bore during firing with space average thermodynamic parameters. The interior ballistic constant differential equations are solved by means of fourth-order Runge-Kutta, and the pressure, velocity and temperature of powder gases variation with time in the period of interior ballistic are calculated. The tank gun bore powder gas temperature formula of aftereffect period is established by means of exponent function, and powder gas temperature changing courses of tank gun bore during the firing are obtained. The com- parisons of the simulation and experiment results demonstrate the accuracy of the calculation results. The calculation results can provide theoretical basis for study on erosion, status of heat and infrared radiation characteristic of tank gun bore.