Temperature is a critical parameter to diagnose the high temperature hypersonic combustion flow. A fiber-spectrometer based measurement system and the correlated theoretical models to measure the radiation temperature of the “optical thick” hypersonic combustion flow were established in this paper. The spectral responsivity of the fiber-spectrometer based measurement system was measured at NIM in lab condition, and the spectral radiance and emissivity of the hypersonic combustion flow were measured in-situ at the combustion wind tunnel of BISLMV. Preliminary experimental results showed the spectral emissivity of the combustion flow was about 0.1 in the spectral range 500-800nm without strong spectral selection, which resulted in the radiation temperature about 2200 K, with relative standard uncertainty about 10%.

Date Published: 8 March 2017
PDF: 6 pages
Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102551S (8 March 2017); doi: 10.1117/12.2267038

Published in SPIE Proceedings Vol. 10255:
Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016
Yueguang Lv; Jialing Le; Hesheng Chen; Jianyu Wang; Jianda Shao, Editor(s)