Accession Number : AD0665870

Title :   MHD ROUND PIPE FLOW EXPERIMENTS.

Descriptive Note : Final rept. Jan 65-Nov 67,

Corporate Author : GRUMMAN AIRCRAFT ENGINEERING CORP BETHPAGE N Y RESEARCH DEPT

Personal Author(s) : Loeffler,Albert L. , Jr. ; Maciulatis,Algirdas ; Hoff,Marc

Report Date : DEC 1967

Pagination or Media Count : 131

Abstract : Experiments were performed with liquid mercury flowing through electrically insulated circular channels in the presence of a uniform transverse magnetic field. The circular channels were equipped with static pressure taps along their length so that it was possible to determine the axial pressure gradient in the fully developed portion of flow. The three channels had inside diameters of 6.144, 0.800, and 0.505 cm. The maximum magnetic field was 1.9 webers/sq. m and the length of the magnetic field region was about 1.52 m. Maximum Reynolds numbers of 2,800,000 and maximum Hartmann numbers of 3012 were obtained. Friction factors are presented for the laminar and turbulent flow regimes. In addition to pressure distributions, velocity profiles were measured by means of pitot tubes in the largest test section for magnetic field of zero, 1.0, and 1.9 webers/sq. m, corresponding to Hartmann numbers of 0, 1597 or 3033, respectively, along two different traverses: a radius perpendicular to the magnetic field and a radius parallel to the magnetic field. Parallel to the magnetic field, the velocity profiles were almost completely flat for the fields of 1.0 and 1.9 webers/sq. m. The profiles perpendicular to the field, however, were fairly steep. The theoretical analyses predicted similar core velocity profiles for both laminar and turbulent flow. (Author)

Descriptors :   (*MAGNETOHYDRODYNAMICS, MERCURY), PIPES, LAMINAR FLOW, TURBULENCE, CYLINDRICAL BODIES, MAGNETIC FIELDS, FRICTION, VELOCITY

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE