Condensation Scaling Laws for Reservoir and Nozzle Parameters and Gas Species as Determined by Laser Scattering Experiments.

摘要

A study of the condensation of gases in expansion flow fields has been performed using laser Rayleigh scattering with the goal of determining the dependence of the spatial location of onset and subsequent condensate growth with gas reservoir conditions, gas source parameters, and gaseous species. Sonic orifice and conical nozzle expansions of N2 were studied for the range of reservoir pressure values from 0.26 to 10.2 atm at a nominal reservoir temperature of 285K. The conical nozzle expansions included the nozzle half angles of 5.60, 9.0, and 14.5 deg. Finally, sonic orifice expansions produced by sources of two different diameters were investigated for flow fields of Ar, N2, O2, and CO.