Kinetics of UV Production behind Shock Waves in Air.

摘要

In a series of shock-tube experiments, the time-dependent ultraviolet radiation behind the shock wave has been measured for various O2/N2 mixtures and for a range of shock velocities from 3.24 to 3.86 mm/micro. For the nonequilibrium region directly behind the shock, calibrated time histories of NO Gamma radiation are presented. the kinetic mechanisms governing this nonequilibrium radiation have been investigated, but values for specific rate constants have not yet been determined. Concurrent infrared measurements which viewed the NO IR system at 1850/cm show agreement with calculated NO equilibrium values, but did not have the time resolution to follow the details of the nonequilibrium emission. Plans for improved instrumentation and further measurements are described. Keywords: Shock tubes/waves, Excited state kinetics, Ultraviolet communications, Nonequilibrium airflow, Reprints. (cp)