Magnetic field coupled velocimeters - year one
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.
- Publication:
-
Final Report
- Pub Date:
- January 1981
- Bibcode:
- 1981amaf.rept.....S
- Keywords:
-
- Flow Measurement;
- Flow Velocity;
- Magnetic Fields;
- Velocity Measurement;
- Combustion Chambers;
- Computerized Simulation;
- Exhaust Nozzles;
- Lorentz Force;
- Turbulent Flow;
- Instrumentation and Photography