Argon Nucleation in a Supersonic Nozzle

Experiments on the condensation of gaseous argon by homogeneous nucleation have been carried out in a supersonic nozzle at pressures high enough so that the phase change occurs under collision dominated or continuum flow conditions. In addition, the argon is precooled in a liquid nitrogen heat excha...

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Bibliographic Details
Main Author: Stein,Gilbert D
Format: Report
Language:English
Subjects:
ARGON
EXPERIMENTAL DATA
Fluid Mechanics
GAS DYNAMICS
NUCLEATION
SUPERCOOLING
SUPERSONIC FLOW
SUPERSONIC NOZZLES
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Summary:Experiments on the condensation of gaseous argon by homogeneous nucleation have been carried out in a supersonic nozzle at pressures high enough so that the phase change occurs under collision dominated or continuum flow conditions. In addition, the argon is precooled in a liquid nitrogen heat exchanger so that the onset of nucleation takes place at a low enough Mach number (1.85 in this case) such that the experiments can be interpreted through the use of one-dimensional gasdynamics. The supply pressure and temperature are varied so that the onset of condensation occurs at the nozzle exit, as detected through the use of laser light scattering. Prepared in cooperation with Northwestern Univ., Evanston, Ill. Gas Dynamics Lab. Report on Experimental and Theoretical Study of Condensation by Homogeneous Nucleation.