USE OF IONIZATION AND THIN-FILM PROBES TO LOCATE SHOCK FRONTS IN A PRESSURE-DRIVEN SHOCK TUBE,
Abstract
The usefulness of ionization probes and thin-film probes for locating shock fronts in air and in argon was determined for the test conditions of 8< or Ms< or 11 and 2<or p sub i< or 20 mm Hg, where Ms is the shock Mach number and p sub i is the initial pressure in the shock tube. With the probes located in the field of view of a Kerr cell shuttered shadowgraph, the shock front-to-probe distance was correlated with the probe output by displaying the Kerr cell shuttered pulse and the probe signal on the same oscilloscope trace. The results show that the thin-film probe is superior to the ion probe for locating the shock front, there being a small variation in signal delay time of approximately 0.2 microsec for the thin film while the ion probe delay time varied from 0.2 to 3.0 microsec, depending upon test conditions and test gas. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1966
- Accession Number
- AD0634509
Entities
People
- Harry A. Gieske
Organizations
- Harry Diamond Laboratories