脉冲激光能量对ADN基液体工质推进特性的影响规律

Effects of Pulse Laser Energy on Propulsion Characteristics of ADN-based Propellant

为获得脉冲激光能量对含能液态工质推进性能的影响规律,通过基于激光器、高速相机、扭摆搭建的测试系统对二硝酰胺铵(ADN)基液体工质的吸收性能、烧蚀性能、推进性能进行了研究。结果表明:ADN基含能液体是一种理想的液体工质,吸收系数达354.05cm^(-1),吸收深度为28.24μm。在0~63.97mJ能量范围内,增大激光能量有利于提高ADN基液体工质的推进性能。在激光能量为63.97mJ时,ADN基液体工质的推进性能达到最优,对应的推进性能参数分别为:冲量53.31μN·s,冲量耦合系数0.8757mN·s·J^(-1),比冲281.59s,能量转化效率122.40%。

In order to study the effects of the pulsed laser energy on the propulsion performance of liquid propellant,the absorption performance,ablation performance and propulsion performance of the ammonium dinit⁃ramide(ADN)-based propellant were tested by the systems based on laser,high-speed camera and torsion pen⁃dulum.The experimental results show that the ADN-based propellant is an ideal liquid working medium,with an absorption coefficient of 354.05cm^(-1) and an absorption depth of 28.24μm.In the energy range of 0~63.97mJ,la⁃ser energy is beneficial to improving the propulsion performance of ADN-based propellant.When the laser energy is 63.97mJ,the propulsion performance of ADN-based propellant reaches the best,with an impulse of 53.31μN·s,an impulse coupling coefficient of 0.8757mN·s·J^(-1),a specific impulse of 281.59s and an energy conversion efficiency of 122.40%.