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Published in:
2019 | OriginalPaper | Chapter
Application of NO Laser-Induced Fluorescence in JF-10 Detonation-Driven Shock Tunnel
Authors : H. Yan, S. Zhang, X. Yu
Published in: 31st International Symposium on Shock Waves 1
Publisher: Springer International Publishing
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Abstract
We have presented our recent progress in the application of γ(0,0) band NO LIF in the hypersonic flow with total enthalpy of 16.2 MJ/kg generated by JF-10, a H2/O2-detonation-driven shock tunnel. The strong luminosity behind the shock wave is competing against the fluorescence signal, and the photon collecting efficiency of such facilities is limited by its large dimension. To cope with the problems, the laser sheet of a conventional planar LIF is rotated 90° along its propagation direction, so that the fluorescence signal collected by the camera concentrates on a sharp line. This setup makes LIF signal stand out even after the shock wave. With this setup, the S/N ratio is also increased; thus single-shot measurement is achievable. In this paper, the rotational temperature of the flow is estimated based on two-line thermometry.