Physics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986lpl..rept.....s&link_type=abstract
Final Report, Sep. 1982 - Sep. 1983 Arizona Univ., Tucson. Lunar and Planetary Lab.
Physics
Cryogenics, Experiment Design, Frost, Ice Formation, Jupiter Atmosphere, Test Equipment, Wind Tunnel Tests, Infrared Spectroscopy, Reflectance, Temperature Measurement, Thickness, Wind Velocity
Scientific paper
A wind tunnel was built to simulate the rapid movement of an entry probe through the Jupiter atmosphere. Wind speeds range from 1 to 50 meters per second in a closed system. Wind velocity and temperature probes as well as a cryogenically cooled cold finger can be placed in the 6 inch diameter viewing section. The initial testing of the wind tunnel involved running sectional profiles through the observation port of air currents of 0.1 to 3.0 atmosphere. The velocity profile was very uniform throughout the cross section of the experimental port, with the exception of the wall effects. The deposition of cooled volatiles using the wind tunnel was not performed. However, measurements of the deposition of H2O ice on a cryogenically cooled thickness modulator were made under ambient conditions, namely room temperature and pressure. In the Frost Depositon Test Facility, ice deposition was measured at thicknesses of about a half millimeter and frost was produced whose thickness reflectivity could easily be measured by reflectance spectroscopy.
Fink Uwe
Sill Godfrey T.
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