Feasibility of moiré deflectometry for measuring temperature and electron number density of rocket exhaust plume

Yun-yun Chen; Yang Song; Zhen-hua Li; An-zhi He

doi:10.1117/12.869955

5 November 2010 Feasibility of moiré deflectometry for measuring temperature and electron number density of rocket exhaust plume

Yun-yun Chen, Yang Song, Zhen-hua Li, An-zhi He

Author Affiliations +

Proceedings Volume 7848, Holography, Diffractive Optics, and Applications IV; 78480B (2010) https://doi.org/10.1117/12.869955
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

In this research, the feasibility of moiré deflectometry for diagnosing the temperature and the electron number density of rocket exhaust plume is studied. The dependence of the refractive index on the temperature, the pressure, the composition and the probe wavelength is established firstly. Based on which, the theoretical analysis and discussion indicate that it is impossible to achieve the measurement of the electron number density by both one- and two-wavelength moiré deflectometry in the given temperature, pressure and probe wavelength regions. Yet, it may be feasible to measure the temperature distribution of rocket exhaust plume by moiré deflectometry, if the imprecision of the temperature reconstruction is permitted by the practical measuring requirement.

Citation Download Citation

Yun-yun Chen, Yang Song, Zhen-hua Li, and An-zhi He "Feasibility of moiré deflectometry for measuring temperature and electron number density of rocket exhaust plume", Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78480B (5 November 2010); https://doi.org/10.1117/12.869955

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