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本文根据涡轮尾翼弹的无后座炮的弹道特点,分析了火药气体的二次膨胀过程,并利用无后座条件建立了涡轮前后的压力比关系式,另外,还采用真空膨胀理论的假设,确定作用于涡轮及弹头上的力的系数,从而建立了弹道解法所需要的气体流量方程和弹丸运动方程。最后,根据射击过程的特点建立了各阶段的解法。因为解法是以几何燃烧定律及正比燃速定律为基础,故所采用的火药形状特征量及压力全冲量这两个常量有一定的经验性。实践证明应用两个常数按一般无后座炮所采用的数据,可给出符合实际的结果。
In this paper, the secondary expansion process of gunpowder gas is analyzed based on the trajectory characteristics of the non-recoil guns. The pressure ratio relationship before and after the turbine is established with no backseat conditions. In addition, the theory of vacuum expansion is adopted, The coefficients of the forces acting on the turbine and the projectile are determined, and the equations of the gas flow and projectile motion needed for the ballistic solution are established. Finally, according to the characteristics of the shooting process to establish the solution of each stage. Because the solution is based on the laws of geometric combustion and the law of the ratio of burning rate, the constants of shape and characteristic of the powder used and the total impulse pressure have some empirical features. Practice has proved that the application of two constants according to the data generally used without recoil gun, can be given in line with the actual results.