基于密闭爆发器试验的发射装药内弹道性能预估

Interior Ballistic Performance Prediction of Gun Propellant Charge Based on Closed-bomb Test

为了预估发射装药的内弹道性能,建立了一种基于密闭爆发器试验检测发射药的静态燃烧性能参数进而预测其装药内弹道性能的方法,采用不同批次的单樟-5/7发射药进行了装药性能预估计算,并基于30 mm火炮对内弹道性能预估精度进行了试验验证。结果表明,采用所建立的基于密闭爆发器试验的发射装药内弹道性能预估方法计算获得的最大膛压为376.0 MPa,与试验测试的膛压平均值388.7 MPa的计算误差为3.27%;计算的炮口初速为1143.5 m/s,与试验测试的炮口初速平均值1156.3 m/s的计算误差为1.11%。所建立的基于密闭爆发器试验的发射装药内弹道性能预估方法具有较高的精度,可对发射药样品不同批次间的内弹道性能进行高效精确的预估,为长期贮存发射药使用寿命的判定及发射药产品的出厂校验提供了一种高效低成本的弹道性能评价方法。

To estimate the interior ballistic performance of gun propellant charge,a calculation method was established using static burning parameters obtained by the closed-bomb tests.The calculation of interior ballistic performance of charge was performed using 5/7 single-base camphor gun propellants from different batches,and the 30 mm gun tests were carried out to evaluate the calculation accuracy.The results show that the calculated maximum chamber pressure by this method is 376.0 MPa.Compared with mean value of tested maximum chamber pressure of 388.7 MPa,the calculated error of the maximum chamber pressure is 3.27%.The calculated muzzle velocity is 1143.5 m/s,with the calculation error of 1.11%compared with the tested velocity result of 1156.3 m/s.The calculation method with high precision is effective on estimating the interior ballistic performance of propellants from different batches.It also provides a new method for assessment of propellant storage and service life.At last,it can serve as an economical and effective evaluation method in the delivery inspection.