Share Email Print
cover

Proceedings Paper

High enthalpy arc-heated plasma flow diagnostics by tunable diode laser absorption spectroscopy
Author(s): Xin Lin; Lianzhong Chen; Hui Zeng; Dongbin Ou; Yonghui Dong
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

This paper reports the laser absorption measurements of atomic oxygen in the FD04 arc-heater at China Academy of Aerospace Aerodynamics (CAAA). An atomic oxygen absorption line at 777.19 nm is utilizied for detecting the population of electronically excited oxygen atom in an air plasma flow. A scanned-wavelength direct absorption mode is used in this study. The laser is scanned in wavelength across the absorption feature at a rate of 200 Hz. Under the assumption of thermal equilibrium, time-resolved temperature measurements are obtained on one line-of-sight in the arc-heater. The good agreement of the temperature inferred from the sonic throat method suggests the equilibrium assumption is valid. These results illustrate the feasibility of the diode laser sensors for flow parameters in high enthalpy arc-heated facilities.

Paper Details

Date Published: 12 May 2017
PDF: 7 pages
Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 101731A (12 May 2017); doi: 10.1117/12.2266510
Show Author Affiliations
Xin Lin, China Academy of Aerospace Aerodynamics (China)
Lianzhong Chen, China Academy of Aerospace Aerodynamics (China)
Hui Zeng, China Academy of Aerospace Aerodynamics (China)
Dongbin Ou, China Academy of Aerospace Aerodynamics (China)
Yonghui Dong, China Academy of Aerospace Aerodynamics (China)


Published in SPIE Proceedings Vol. 10173:
Fourth International Symposium on Laser Interaction with Matter
Yongkun Ding; Guobin Feng; Dieter H. H. Hoffmann; Jianlin Cao; Yongfeng Lu, Editor(s)

© SPIE. Terms of Use
Back to Top