A quasi-isentropic study on the process of driving a cylinder with aluminized explosives was carried out to examine the influence of the aluminum (Al) reaction rate on cylinder expansion and the physical parameters of the detonation products. Based on the proposed quasi-isentropic hypothesis and relevant isentropic theories, the characteristic lines of aluminized explosives driving a cylinder were analyzed, and a quasi-isentropic model was established. This model includes the variation of the cylinder wall velocity and the physical parameters of the detonation products with the Al reaction degree. Using previously reported experimental results, the quasi-isentropic model was verified to be applicative and accurate. This model was used to calculate the physical parameters for cylinder experiments with aluminized cyclotrimethylenetrinitramine explosives with 15.0 % and 30.0 % Al content. The results show that this quasi-isentropic model can be used not only to calculate the cylinder expansion rule or Al reaction degree, but also to calculate the physical parameters of the detonation products in the process of cylinder expansion. For explosives with 15.0 % and 30.0 % Al, 24.3 % and 18.5 % of the Al was found to have reacted at 33.9 μs and 34.0 μs, respectively. The difference in Al content results in different reaction intensity, occurrence time, and duration of two forms of reaction (diffusion and kinetic) between the Al powder and the detonation products; the post-detonation burning reaction between the Al powder and the detonation products prolongs the positive pressure action time, resulting in a continuous rise in temperature after detonation.

对铝化炸药驱动气缸的过程进行了准等熵研究，以检验铝 (Al) 反应速率对气缸膨胀和起爆产物物理参数的影响。基于所提出的准等熵假说和相关等熵理论，分析了镀铝炸药驱动圆柱体的特征线，建立了准等熵模型。该模型包括筒壁速度和爆轰产物物理参数随铝反应程度的变化。使用先前报道的实验结果，验证了准等熵模型的适用性和准确性。该模型用于计算铝含量为 15.0% 和 30.0% 的镀铝环三亚甲基三硝胺炸药的圆柱体实验的物理参数。结果表明，该准等熵模型不仅可用于计算气缸膨胀规律或Al反应度，还可用于计算气缸膨胀过程中爆轰产物的物理参数。对于含 15.0% 和 30.0% 铝的炸药，发现 24.3% 和 18.5% 的铝分别在 33.9 μs 和 34.0 μs 发生反应。铝含量的不同导致铝粉与爆轰产物之间两种反应形式（扩散和动力学）的反应强度、发生时间和持续时间不同；