Vibrationally excited NO tagging by NO(A) fluorescence and quenching for simultaneous velocimetry and thermometry in gaseous flows. uri icon

abstract

  • We present measurements demonstrating simultaneous determination of velocity and temperature using a variant of the Vibrationally Excited Nitric Oxide Monitoring (VENOM) technique that does not employ NO2. The variant is based on tagging by electronic excitation of NO in the A(1/2) (v'=0)X21/2(v''=0) band and subsequent formation of vibrationally excited NO(X2) by spontaneous emission and collisional quenching. Sequential planar laser-induced fluorescence imaging of the nascent NO(X2, v''=1) was used to obtain spatially resolved average streamwise velocity and rotational/translational temperature. The temperature determination using this approach extends the applicability of the VENOM technique to low-density, high-speed flows, where slow thermalization of the tagged molecules represents a limiting factor.

published proceedings

  • Opt Lett

author list (cited authors)

  • Snchez-Gonzlez, R., Bowersox, R., & North, S. W.

citation count

  • 34

complete list of authors

  • Sánchez-González, Rodrigo||Bowersox, Rodney DW||North, Simon W

publication date

  • May 2014