INVESTIGATION OF THE FEASIBILITY OF AN ELECTROGASDYNAMIC PROBE FOR MEASUREMENTS OF MEAN AND RMS VELOCITIES.
Abstract
The study involves the investigation of the feasibility of an electrogasdynamic (EGD) probe to measure mean and turbulent velocities. The free stream veolcity was 185 ft/sec and measurements were made in the wake of a circular cylinder 2 cm in diameter. Readings made with a hot-wire anemometer at the same location and in the same spectral range were used as the standard of comparison. The initial data indicated that investigations should be restricted to the region from 2 mm to 10 mm aft of the injector nozzle along the center line. Spectral data for both the hot-wire and the EGD probe measurements were obtained with a frequency analyzer and photographed from an X-Y display. The use of an EGD probe for measurements of mean and rms velocities may be feasible since the results indicate a definite correlation. The utility of the probe, however, is yet to be demonstrated since both the spatial and spectral comparisons with the hot-wire results show some lack of correspondence. The EGD unit proved to be considerably more rugged than the hot-wire probe. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1970
- Accession Number
- AD0710719
Entities
People
- Richard Alan Christianson
Organizations
- Naval Postgraduate School