MHD ROUND PIPE FLOW EXPERIMENTS.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0665870
Entities
People
- Albert L. Loeffler Jr.
- Algirdas Maciulatis
- Marc Hoff
Organizations
- Grumman