液体烧蚀激光推进推力形成机理实验方法

为揭示液体烧蚀激光推进推力形成机理,提出了一种有效的实验方法,即建立推力加载过程与流场演化过程的时间关联性,寻找物理现象与推力特征之间的关系。为实现这种方法,建立了一套基于高速相机和高频响压电式力传感器的实验系统,并实现对激光器、闪光仪、高速相机和推力信号采集系统的工作时序的精确控制。实验结果表明,与国外相关文献提供的实验系统相比,依据本方法所建系统可以提高实验研究效率和精度,为分析液体烧蚀所形成推力的机理提供了一种可靠的实验方法。

Experiment method on mechanism of thrust of laser-induced ablation propulsion with liquid propellant

An effective experiment method was presented in order to discover mechanism of thrust of laser-induced ablation propulsion with liquid propellant to establish relevance between characters of thrust loading and evolution process of flux-field.Then it is easy to find which physical phenomena causes the thrust characters.A set of experimental system is established based on high-speed camera and force sensor with high frequency for the sake of applying the way to actual research work.The time sequence of laser,stroboscope,high speed and picking system of thrust information is in precision control to obtain reliable datum.Results show that higher activity and precision can be reached.This method is useful for analysis of mechanics of thrust formation in laser-ablation propulsion with liquid propellant and some other coherent work.