The NCAR Vertical Wind Tunnel: A Vertical Wind Tunnel for Controlling the Motion and Environment of Atmospheric Particles.

摘要

The NCAR vertical wind tunnel provides a vertically directed air flow that may be varied to control the vertical motion of particles,or to suspend particles for study. The environmental conditions may be varied over a range of temperature (-25to +27deg C),humidity (-45deg C frost point to saturation at +27deg C),electric field,and vertical velocity (1.25cm/sec to 9.5 m/sec). The drop size that can be supported by the vertical flow varies from diameters of about 20micrometers to about 5mm. This wide range of variation permits duplication of environmental conditions so that water drops and ice particles and their interactions may be studied in the laboratory under environmental conditions similar to those found in nature.