弹丸初速是气体炮试验设备中最为重要的技术指标。为了合理的提高气体炮弹丸初速,建立了弹丸初速的影响因素计算模型,利用气体炮内弹道方程验证了计算模型的准确性。计算分析了气体炮中气室容积、气室初始压力、发射管长度三个影响因素对气体炮弹丸初速的影响。计算结果表明增长发射管长度可以有效合理地提高气体炮的弹丸初速,降低炮口压力值,加强气体炮的发射稳定性。该研究结果能够为气体炮的设计和优化提供一定的理论依据。

The initial velocity of the projectile is the most important technical indicator in the gas gun test equipment. In order to reasonably improve the projectile initial velocity of gas gun, the calculation model of the influencing factor of projectile initial velocity was built, and the accuracy of the calculation model is verified by the interior ballistic equation of gas gun. The influence of three factors, the air chamber volume of gas gun, the initial pressure of the gas chamber and the length of transmitting tube, on the projectile initial velocity of the gas gun was calculated and analyzed. The calculation results show that increasing the length of the transmitting tube can effectively and reasonably improve projectile initial velocity of gas gun, reduce the pressure of the muzzle and enhance the launching stability of the gas gun. The research results can provide theoretical basis for the design and optimization of gas gun.