INITIAL OPERATION OF THE PILOT COUNTERFLOW TEST UNIT (I)
Abstract
A small counterflow test unit which consists of a shock tunnel and a hypervelocity launcher is being evaluated at the VKF, AEDC. The results of the shock tunnel calibration, the performance of the model launcher system, counterflow operating experiences, and some preliminary measurements of shock- cap radiation are reported. The shock tunnel calibration data for a room- temperature, helium driver gas are shown to confirm theoretical calculations and indicate clean uniform flow during a 4- to 5-msec run time. Aluminum spheres of 0.95-cm diam (0.375 in.) were launched with a 2-stage-light-gas gun at velocities between 4.0 and 5.5 km/sec (13,000 and 18,000 fps). During counterflow runs, relative velocities up to 7.5 km/sec (25,000 fps) were attained. Measurements of total radiation from the shock-caps of the small spheres are in reasonable agreement with theories and previous measurements from free-flight and shock tube facilities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1965
- Accession Number
- AD0465893
Entities
People
- Henry W. Ball
Organizations
- Arnold Engineering Development Complex