COMPUTATION AND MEASUREMENT OF HALL POTENTIALS AND FLOW FIELD PERTURBATIONS IN MAGNETOGASDYNAMIC FLOW OF AN AXISYMMETRIC FREE JET,
Abstract
The interaction was observed between a supersonic free jet of partially ionized argon and the magnetic field of a coil concentric with the jet. Nominal values of the parameters were: Mach number, 3; Reynolds number, 1000; magnetic Reynolds number, 0.2; magnetic interaction parameter, 1; and Hall parameter, 1. The jet was strongly channelled. Axial and radial electric fields were observed in the jet with a net rise in potential across the interaction. These observations were consistent with predictions based on the single fluid, macroscopic equations, and a simple slug flow model. The current equation was solved to second order in the Hall parameter giving a closed form expression for the Hall potential which agreed with the experiments for weak fields. Flow perturbations were calculated for Mach numbers of 3.11, 6.08 and 10.05 by applying the method of characteristics to the linearized equations for a non-viscous, compressible fluid, neglecting Hall currents. The calculations are in qualitative agreement with the experiments and show Joule heating to be the major factor in perturbing the flow at high Mach numbers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 10, 1964
- Accession Number
- AD0431761
Entities
People
- David R. Otis
Organizations
- University of California, Berkeley