Observation and analysis of flow field in laser ablation plume of POM

被引：1

作者：

Liu Kefei ^{[1
]}

Ye Jifei ^{[1
]}

机构：

[1] Equipment Acad, State Key Lab Laser Prop & Applicat, Beijing 101416, Peoples R China

来源：

SELECTED PAPERS FROM CONFERENCES OF THE PHOTOELECTRONIC TECHNOLOGY COMMITTEE OF THE CHINESE SOCIETY OF ASTRONAUTICS 2014, PT II | 2015年 / 9522卷

关键词：

Laser ablation; Shadowgraph technique; Plume; Experiment research;

D O I：

10.1117/12.2179855

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

When using YAG laser emit strong laser pulses to bombardment solid POM, in the areas of interaction will produce a plume. A shadowgraph photography technique was employed for visualizing temporal evolution of plume. The experiment results show that in the plume flow field, multi-density discontinuities were observed. The plume has a high speed towards laser source, and plume uneven expansion makes the shape and position of discontinuities change. Plume velocity affect the propulsive efficiency, enhance the pulse laser energy can speed up the plume, energy increase to a certain degree of plume speed will reach a steady-state value.

引用

页数：7