飞秒激光电子激发标记测速方法及其在超声速射流中的试验验证

朱志峰; 李博; 高强; 李中山; 陈爽; 陈力; 杨富荣

doi:10.7638/kqdlxxb-2018.0150

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飞秒激光电子激发标记测速方法及其在超声速射流中的试验验证

研究论文 | 更新时间：2026-05-28

- 飞秒激光电子激发标记测速方法及其在超声速射流中的试验验证
- Femtosecond laser electronic excitation tagging for velocity measurement in supersonic jet
- 空气动力学学报 2020年38卷第5期页码：880-886
- 作者机构：
  
  1. 天津大学内燃机燃烧学国家重点实验室,天津,300072
  2. 中国空气动力研究与发展中心,绵阳,621000
- 作者简介：
  
  朱志峰(1994-), 男, 河南武陟人, 硕士研究生, 研究方向:燃烧激光诊断.E-mail:3012201358@tju.edu.cn
  陈爽(1979-), 男, 副研究员, 研究方向:燃烧流场激光光谱诊断.E-mail:chenshuang827@gmail.com
- 基金信息：
  
  国家自然科学基金（91741205，51776137）
- DOI：10.7638/kqdlxxb-2018.0150
  中图分类号： V211.3
- 纸质出版：2020
- 稿件说明：
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朱志峰, 李博, 高强, 李中山, 陈爽, 陈力, 杨富荣. 飞秒激光电子激发标记测速方法及其在超声速射流中的试验验证[J]. 空气动力学学报, 2020, 38(5): 880-886.

ZHU Zhifeng, LI Bo, GAO Qiang, et al. Femtosecond laser electronic excitation tagging for velocity measurement in supersonic jet[J]. 2020, 38(5): 880-886.
朱志峰, 李博, 高强, 李中山, 陈爽, 陈力, 杨富荣. 飞秒激光电子激发标记测速方法及其在超声速射流中的试验验证[J]. 空气动力学学报, 2020, 38(5): 880-886. DOI： 10.7638/kqdlxxb-2018.0150.

ZHU Zhifeng, LI Bo, GAO Qiang, et al. Femtosecond laser electronic excitation tagging for velocity measurement in supersonic jet[J]. 2020, 38(5): 880-886. DOI： 10.7638/kqdlxxb-2018.0150.

摘要

为了研究飞秒激光电子激发标记测速方法在超声速流场中的适用性，利用该技术进行了超声速速度场的测量与二维轴向速度场重建的研究。将飞秒激光激发流场空气中的氮气分子作为示踪分子，示踪分子随流场移动并发出荧光，通过测量示踪分子所发出的荧光信号在固定时间内的位移来进行测速。运用该技术研究了轴对称的超声速自由射流的速度场分布情况，获得了超声速射流的轴向速度变化和不同高度速度的一维分布，在此基础上重建了超声速射流的二维轴向速度场，并给出了速度测量误差。

Abstract

The velocity profile of supersonic jet measured by femtosecond laser electronic excitation tagging (FLEET) is discussed in order to study the applicability of the FLEET in the supersonic flow field. A femtosecond laser is used to excite nitrogen molecules as tracer molecules in the flow field. The tracer molecules move with the flow field and emit fluorescence

and the velocity is calculated by the ratio of the displacement of fluorescence emission to a certain time. The velocity field of an axisymmetric supersonic free jet is studied. The axial velocity and one-dimensional velocity distribution at different axial heights are obtained. On this basis

the two-dimensional axial velocity profile of the supersonic jet is reconstructed

and the velocity measurement error is given.

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references

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