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

# 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.

# authors[].organizations[].label
Texas A&M Engineering Experiment Station (TEES)

# keywords[]
5102 Atomic, Molecular And Optical Physics

# authorList[]
Snchez-Gonzlez, R., Bowersox, R., & North, S. W.