Zr/KClO_4激光点火延迟时间与装药密度的关系

Relationship between Laser Ignition Delay Time and Charge Density of Zr/KClO_4

采用光纤插入式激光点火器测定了Zr/KClO4点火药的装药密度和压药压力的关系及激光点火延迟时间和装药密度的关系，得出在压药压力5-130 MPa范围，对应的装药密度变化为0.94-1.39 g·cm^-3；在密度1.0-1.38 g·cm^-3范围，对应的点火延迟时间变化为2.83-0.54 ms。在装药密度≤1.25 g·cm^-3时，点火延迟时间随密度变化较快，装药密度≥1.30 g·cm^-3时，点火延迟时间随密度增加趋于稳定，最短点火延迟时间约为0.54 ms。在装药密度较低时，如低于1.07 g·cm^-3，对应压药压力低于30 MPa，实验数据散布较大。

The relationship between charge density and loading pressure,and between laser ignition delay time and charge density of Zr/KClO4 were studied by fiber inserted laser igniter. The density ranges of 0. 94. - 1.39 g·cm^-3 corresponding to the loading pressure ranges of 5 - 130 MPa and the delay time ranges of 2. 83 - 0. 54 ms corresponding to the density ranges of 1.0 - 1.38 g·cm^-3 were obtained. With the density below 1.25 g - em-3 ,the ignition delay time changes fasler with density ,and tends to be stable when the density overpasses 1.30 g·cm^-3 ,with the shortest delay time in 0.54 ms. When the density is lower, such as below 1.07g·cm^-3 and the corresponding loading pressure is less than 30 MPa,scattering of experimental data is bigger.