Molecular tagging velocimetry of NH fluorescence in a high-enthalpy rarefied gas flow

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	Molecular tagging velocimetry of NH fluorescence in a high-enthalpy rarefied gas flow
	Zhang SH(张少华); Yu XL(余西龙); Yan H; Huang HJ(黄河激); Liu HL(刘宏立)
刊名	APPLIED PHYSICS B-LASERS AND OPTICS
	2017-04-01
卷号	123 期号:4
关键词	Molecular tagging velocimetry NH fluorescence High-enthalpy Rarefied gas
ISSN号	0946-2171
中文摘要	In this paper a new type of molecular tagging velocimetry based on NH fluorescence was developed and validated for the velocity measurements of a high-enthalpy rarefied gas wind tunnel where the maximum flow velocity exceeds 6 km/ s near the nozzle exit at 0.2 Pa. The feasibility of this technique using the short-lived NH fluorescence was demonstrated in the hypersonic rarefied gas flow with yielding velocity profiles at multiple downstream locations from the nozzle exit. The total uncertainty of the measured flow velocities was estimated to be less than 6% when the flow velocity is above 2000 m/ s. For the new tagging technique only a single laser and a single time-gated camera are required for velocity measurement due to the existence of NH radicals in the arc-discharged-N2 mixed with a small amount of H-2. Therefore the NH-MTV not only shows great promise for tagging in high-enthalpy rarefied gas of nitrogen or air flows without seeding but also possesses high practicability and facility for velocity measurement.
类目[WOS]	Optics ; Physics, Applied
研究领域[WOS]	Optics ; Physics
关键词[WOS]	LASER-INDUCED FLUORESCENCE ; VELOCITY-MEASUREMENTS ; RAYLEIGH-SCATTERING ; PHOSPHORESCENCE ; VISUALIZATION ; DIFFUSION ; PRESSURE ; FLAMES
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000401569400028
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60551]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Zhang SH,Yu XL,Yan H,et al. Molecular tagging velocimetry of NH fluorescence in a high-enthalpy rarefied gas flow[J]. APPLIED PHYSICS B-LASERS AND OPTICS,2017,123(4).
APA	张少华,余西龙,Yan H,黄河激,&刘宏立.(2017).Molecular tagging velocimetry of NH fluorescence in a high-enthalpy rarefied gas flow.APPLIED PHYSICS B-LASERS AND OPTICS,123(4).
MLA	张少华,et al."Molecular tagging velocimetry of NH fluorescence in a high-enthalpy rarefied gas flow".APPLIED PHYSICS B-LASERS AND OPTICS 123.4(2017).