| 脉冲数目和重复频率对纳秒激光推进的影响 |
| |
| 引用本文： | 陈豪,石磊,马丽华,彭志明,徐志燕,乔忆炜.脉冲数目和重复频率对纳秒激光推进的影响[J].红外与激光工程,2013,42(9):2403-2408. |
| |
| 作者姓名： | 陈豪 石磊 马丽华 彭志明 徐志燕 乔忆炜 |
| |
| 作者单位： | 1.空军工程大学 信息与导航学院,陕西 西安 710077; |
| |
| 摘 要： | 以抛物形点聚焦激光推进器模型为研究对象，数值模拟了脉冲重复频率在2~50Hz范围内吸气式多脉冲纳秒激光推进的流场演变过程，分析了脉冲数目和重复频率对推进性能的影响。结果表明:随着脉冲数目的增加，喷管内气体密度减小、温度升高，导致平均冲量耦合系数下降，但纳秒脉冲激光作用获得的平均冲量耦合系数明显高于微秒脉冲激光；相同脉冲数目条件下，随着脉冲重复频率的增大，流场恢复时间缩短，使得流场状态不能及时恢复，导致平均冲量耦合系数下降，其中脉冲重复频率f10 Hz时的下降趋势明显大于f10 Hz。
|
| 关 键 词： | 激光推进 纳秒激光 脉冲数目 脉冲重复频率 平均冲量耦合系数 |
| 收稿时间： | 2013-01-06 |
Effect of laser pulse number and repetition frequency on nanosecond laser propulsion |
| |
| Chen Hao
,
Shi Lei
,
Ma Lihua
,
Peng Zhiming
,
Xu Zhiyan
,
Qiao Yiwei.Effect of laser pulse number and repetition frequency on nanosecond laser propulsion[J].Infrared and Laser Engineering,2013,42(9):2403-2408. |
| |
| Authors: | Chen Hao Shi Lei Ma Lihua Peng Zhiming Xu Zhiyan Qiao Yiwei |
| |
| Affiliation: | 1.School of Information and Navigation,Air Force Engineering University,Xi'an 710077,China;2.Army 95107 of PLA,Guangzhou 510500,China;3.School of Aeronautics and Astronatics Engineering,Xi'an 710038,China |
| |
| Abstract: | The parabolic point focusing thruster model was adopted as research object. The development process of flow field of air-breathing nanosecond laser propulsion with pulse repetition frequency of 2-50 Hz was numerically simulated, and the Effect of nanosecond laser pulse number and pulse repetition frequency on performance of laser propulsion was analyzed. The results indicate that with the increase of pulse number, the average impulse coupling coefficient decreased due to the reducing air density and increasing temperature. The average impulse coupling coefficient with nanosecond laser is significantly higher than that with microsecond laser, though. With the same pulse number, when the pulse repetition frequency increased, the flow field had less time to recover, leading to the decreasing average impulse coupling coefficient, and the decreasing trend is much more clear in pulse repetition frequency of f10 Hz than in f10 Hz. |
| |
| Keywords: | laser propulsion nanosecond laser pulse number pulse repetition frequency average impulse coupling coefficient |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《红外与激光工程》浏览原始摘要信息 |
|
点击此处可从《红外与激光工程》下载全文 |
|
