Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows

	Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows
	Li F(李飞); Yu XL(余西龙); Cai WW; Ma L; Ma, L; Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA.
发表期刊	APPLIED OPTICS
	2012-07-10
卷号	51 期号:20 页码:4788-4797
ISSN	1559-128X
摘要	This work investigates the error caused by nonuniformities 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, nonuniformities 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 nonuniformities typically encountered in practice, including boundary layer effects, the divergence/convergence of the flow, and the methods 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.
关键词	Wavelength-modulation Spectroscopy Water-vapor Temperature Distributions Scramjet Combustor Gas Temperature Parameters Pressure Sensors
学科领域	实验流体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000306291100028
课题组名称	LHD高温气流激光诊断
论文分区	二类
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46552
专题	高温气体动力学国家重点实验室
通讯作者	Ma, L; Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA.
推荐引用方式 GB/T 7714	Li F,Yu XL,Cai WW,et al. Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows[J]. APPLIED OPTICS,2012,51,20,:4788-4797.
APA	Li F,Yu XL,Cai WW,Ma L,Ma, L,&Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA..(2012).Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows.APPLIED OPTICS,51(20),4788-4797.
MLA	Li F,et al."Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows".APPLIED OPTICS 51.20(2012):4788-4797.

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