Accession Number : AD0778614

Title :   Theory of Ice Nucleation in Sonic and Supersonic Nozzles.

Descriptive Note : Technical paper,

Corporate Author : NAVY WEATHER RESEARCH FACILITY NORFOLK VA

Personal Author(s) : Todd,C. J. ; Hindman,E. E. , II

Report Date : AUG 1967

Pagination or Media Count : 9

Abstract : The flow of air at the throat of a nozzle will have a Mach number of 1.0, when the stagnation pressure upstream of the throat is 1.9 times environment pressure of the exhaust region. If the stagnation pressure is greater than this critical value, a properly designed nozzle will support supersonic velocities in a region downstream of the throat. This paper is a preliminary draft of an attempt to organize the theoretical considerations involved in the development of ice embryos within supersonic nozzles, so that it will be possible to engineer effective ice nucleating nozzles for clearing supercooled fog.

Descriptors :   *Ice formation, *Supersonic nozzles, *Nucleation, Air flow, Stagnation pressure, Fog, Supercooling, Control, Drops, Time, Jet mixing flow, Mathematical models, Weather modification

Subject Categories : Atmospheric Physics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE