Accession Number : AD0437164


Title :   DEVIATION OF MAST OPERATION FROM ONE-DIMENSIONAL MODEL,


Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS


Personal Author(s) : Fishman,F J ; Petschek,H E


Report Date : Apr 1962


Pagination or Media Count : 23


Abstract : In the magnetic annular shock tube (MAST), the gas is pushed axially along the annual space between concentric cylinders by an azimuthal magnetic field. There is a variation in the driving pressure across the annulus, which leads to radial nonuniformities in the flow. These are analyzed for small ratios (epsilon) of the annulus spacing to the radius. The maximum value of epsilon for which the tilted current sheet does not catch up with the shock wave is calculated and it is suggested that only MASTS with epsilon's smaller than this value produce reasonably uniform flow regions. The nonuniformities which persist far behind the shock are computed; these results indicate that for low shock Mach numbers appreciable nonuniformities in pressure and temperature exist even for small values of epsilon. (Author)


Descriptors :   *SHOCK TUBES , MAGNETIC FIELDS , HYDRODYNAMICS , PLASMAS(PHYSICS) , ACCELERATION , WAVE PROPAGATION , SHEETS , SHOCK WAVES , PRESSURE , TEMPERATURE , RINGS , CYLINDRICAL BODIES , FLUID FLOW , ONE DIMENSIONAL FLOW , MATHEMATICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE