Accession Number : ADA115933

Title :   Magnetic Field Coupled Velocimeters - Year One.

Descriptive Note : Final rept. 15 Nov 80-14 Nov 81,


Personal Author(s) : Spight,Carl

Report Date : 31 JAN 1981

Pagination or Media Count : 56

Abstract : The major elements of the theoretical analysis and numerical simulation phase of a multi-year research program to demonstrate the viability of a totally nonintrusive, magnetically coupled velocimeter has been completed. The velocimeter R/D program was undertaken to yield a device capable of accurately measuring the mean and the turbulent velocity structure of flow-fields typical of rocket combustion chambers and exhaust nozzles. A drive dipole magnetic field array was designed to produce a harmonically varying, spatially localized and controlled field which penetrates flow-fields to produce eddy and motional currents. A probe array has been designed to differentiate those currents from each other and the drive array currents by analytically inverting the measured fields to yield the spatial structure of flow velocity and conductivity. An experimental test of the basic approach (using a electrolytic test chamber) has verified key elements in the analysis. A small, bench scale combustor test of the approach has begun. (Author)

Descriptors :   *Velocimeters, *Magnetic fields, Flow fields, Eddy currents, Lorentz force, Combustion chambers, Turbulent flow, Probes

Subject Categories : Test Facilities, Equipment and Methods
      Electricity and Magnetism
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE