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Nonequilibrium Crystallization of Carbon Dioxide in a Ducted Axisymmetric Jet.
Technical progress rept.,
MEDICAL COLL OF SOUTH CAROLINA CHARLESTON
Pagination or Media Count:
Solid particles of CO2 can be made in a two-stage expansion directly from bottled gas. The first stage of the expansion, a ducted-axisymmetric jet, was chosen as the subject of the report. The first stage was modeled by the appropriate theories of nucleation, growth, gas dynamics, and flow-field conditions. The solution of the theories was accomplished by means of a digital simulation of the flow field. Experimental results prove that the theoretical results are incorrect. Experimental results show that the first stage produces a mass fraction of less than 1 percent, a significant deviation from isentropic prediction of about 15 percent. A totally empirical approach to the jet is recommended. The research was conducted in connection with abrasive removal of burnt ittue eschar.
APPROVED FOR PUBLIC RELEASE