Uncertainty analysis of velocity measured by diode-laser absorption spectroscopy in a scramjet facility | |
Li F(李飞); Yu XL(余西龙); Cai W; Ma L | |
会议录名称 | AIAA 2013-0697 |
2013 | |
会议名称 | 51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition |
会议日期 | 07-10 January 2013 |
会议地点 | Grapevine, Texas |
摘要 | This work investigates the error caused by non-uniformities along the line-of-sight in velocity measurement using tunable diode-laser absorption spectroscopy (TDLAS). Past work has demonstrated TDLAS as an attractive diagnostic technique for measuring velocity, which is inferred from the Doppler shift of two absorption features using two crossing laser beams. However, because TDLAS is line-of-sight in nature, the obtained velocity is a spatially-averaged value along the probing laser beams. As a result, non-uniformities in the flow can cause uncertainty in the velocity measurement. Therefore, it is the goal of this work to quantify the uncertainty caused by various non-uniformities typically encountered in practice, including boundary layer effects, the divergence/convergence of the flow, and the methods (direct absorption vs. wavelength modulation) used to fit the Doppler shift. Systematic analyses are performed to quantify the uncertainty under various conditions, and case studies are reported to illustrate the usefulness of such analysis in interpreting experimental data obtained from a scramjet facility. We expect this work to be valuable for the design and optimization of TDLAS-based velocimetry, and also for the quantitative interpretation of the measurements. |
课题组名称 | LHD高温气流激光诊断 |
URL | 查看原文 |
语种 | 英语 |
文献类型 | 会议论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/47338 |
专题 | 高温气体动力学国家重点实验室 |
推荐引用方式 GB/T 7714 | Li F,Yu XL,Cai W,et al. Uncertainty analysis of velocity measured by diode-laser absorption spectroscopy in a scramjet facility[C]AIAA 2013-0697,2013. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
62013-697.pdf(402KB) | 开放获取 | 使用许可 | 浏览 下载 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论