Burst-mode velocimetry of hypersonic flow by nitric oxide ionization induced flow tagging and imaging Academic Article uri icon


  • This Letter describes, to the best of our knowledge, a new approach to flow tagging, nitric oxide (NO) Ionization Induced Flow Tagging and Imaging (NiiFTI), and presents the first experimental demonstration for single-shot velocimetry in a near Mach 6 hypersonic flow at 250 kHz. The mean velocity of 860 m/s was measured with a single-shot standard deviation of as low as 3.4 m/s and mean velocity uncertainty of 5.5 m/s. NiiFTI is characterized by a long fluorescence lifetime of nitrogen with 1e decay of approximately 50 s measured in air. The method relies on a single nanosecond laser combined with a high-speed camera, creating an opportunity for the utilization of a typical nitric oxide (NO) laser-induced fluorescence (LIF) experimental setup with minor modifications as well as pulse-burst lasers (PBLs) for ultrahigh repetition rates.

published proceedings

  • Optics Letters

author list (cited authors)

  • Leonov, B. S., Moran, A. N., North, S. W., & Miles, R. B.

complete list of authors

  • Leonov, Boris S||Moran, Ashley N||North, Simon W||Miles, Richard B

publication date

  • February 2024