Abstract
In this paper, a new type 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 7 km/s 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 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 small an amount of H2. 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.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
H. Mori et al., JSME Int. J. Ser. B 43, 400 (2000)
C. Dankert et al., New Trends in Instrumentation for Hypersonic Research (Kluwer Academic Publishers, Dordrecht, 1994), pp. 563–581
H. Huang et al., Plasma Chem. Plasma Process. 32, 65 (2012)
H. Huang et al., J. Phys. D. Appl. Phys. 43, 085202 (2010)
J. Tobai et al., T. J. Mol. Struct. 480–481, 307 (1999)
M.D. Smooke et al., Proc. Combust. Inst. 28, 839 (2000)
R. Walter et al., AIAA J. 40, 1065 (2002)
Acknowledgments
The work is partially supported by National Science Foundation of China (Grant No.11672359). The authors acknowledge the assistance provided by C.L. Li, at the Institute of Mechanics, Chinese Academy of Sciences.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer International Publishing AG, part of Springer Nature
About this paper
Cite this paper
Zhang, S., Yu, X., Yan, H., Huang, H., Liu, L. (2019). Molecular Tagging Velocimetry of NH Fluorescence in a High-Enthalpy Rarefied Gas Flow. In: Sasoh, A., Aoki, T., Katayama, M. (eds) 31st International Symposium on Shock Waves 1. ISSW 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-91020-8_43
Download citation
DOI: https://doi.org/10.1007/978-3-319-91020-8_43
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-91019-2
Online ISBN: 978-3-319-91020-8
eBook Packages: EngineeringEngineering (R0)