发射药燃速压力指数对火炮内弹道的影响

为研究新型高能发射药的内弹道性能,采用经典内弹道数学模型理论模拟了发射药的燃速压力指数对火炮内弹道性能的影响.结果表明,发射药燃速压力指数的大小及其随压力的变化规律对内弹道性能有很大的影响,对于燃速压力指数随压力升高而减小的新型高能发射药,可获得较高的内弹道示压效率,降低膛压和弹丸初速对发射药装填条件的敏感性.采用传统的平均燃速压力指数来预测该类发射药的内弹道性能,将出现明显的偏差.

Influence of Burning Rate Pressure Exponent of Propellant on Gun Interior Ballistics

In order to study the interior ballistic behavior of new type high-energy propellant, influence of burning rate pressure exponent of propellant on gun interior ballistic behavior was the- oretically simulated by classical interior ballistic mathematical model. The results show that the value of burning rate pressure exponent of propellant and its change law can bring about a great change of interior ballistic behavior. The new type high-energy propellant whose burning rate pressure exponent is decrescent as pressure increasing can obtain higher interior ballistic piezometric efficiency, and reduce the sensitivity of bore pressure and muzzle velocity on loaded conditions of propellant. It will appear an evident error when interior ballistic behaviors of this kind of high-energy propellant are evaluated by traditional average burning rate pressure exponent.