反射激波强度(压力) 及其持续时间(测试时间) 是评估化学激波管测试性能的主要指标。汇聚曲线能够在相同初始条件下形成更强的激波，然而其在反射激波后会产生压力峰值而无法保持恒定。本研究的主要目标是构建适用于化学激波管中的汇聚曲线，使其具备反射激波后的恒定压力区以及较小曲度的波形分布。首先，基于气体动力学和激波动力学原理，建立了八种不同汇聚曲线的数学模型。其次，搭建了具备不同汇聚曲线的化学激波管二维模型。最后，探究了不同化学激波管内部波系的波形分布，揭示了反射激波后测试时间和压力值的变化规律。结果表明：基于激波动力学的汇聚曲线倾斜角为2° 时，其反射激波后形成了较长的压力恒定区，且波形曲度最小。

The intensity (pressure) of the reflected shock and its duration (test time) are the two main indicators of the performance of chemical shock tubes. Convergence curves are capable of creating stronger shock under the same initial conditions. However, they may bring in pressure peaks after the reflected excitation that cannot be maintained at a constant level. The main objective of the present study is to construct convergence curves suitable for use in chemical shock tubes with a constant pressure region after reflecting the excitation wave and a waveform distribution with less curvature. Firstly, based on the principles of gas dynamics and excitation wave dynamics, mathematical models with eight different convergence profiles were established. Secondly, a twodimensional model of the shock tube with different convergence curves is constructed. Finally, the waveform distribution of the internal wave system of different chemical shock tubes was investigated, and the change rule of test time and pressure value after the reflected shock wave was revealed. Results show that the convergence curve based on shock dynamics with an inclination angle of 2° forms a longer pressure constant zone after reflected shock wave and the waveform curvature is minimum.