INVESTIGATION OF TURBULENT WAKE COOLING WITH BASE EJECTION AT MACH 8
Abstract
Tests were conducted at Mach 8 to investigate the effect on turbulent wake temperatures of base gaseous injection into the near wake of a 20-deg cone- cylinder model. Helium and nitrogen were employed at varying mass flow rates with both supersonic and subsonic ejection velocities. Pitot pressure, cone static surface pressure, total temperature, and helium concentration measurements were made in the region from one to five model diameters downstream of the model base. All data were taken at model zero angle of attack and free- stream Reynolds number of 3,480,000 per foot. Selected results are presented to illustrate the types of data obtained. These results show that helium was the more efficient wake coolant and that supersonic ejection was more efficient than subsonic ejection.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1966
- Accession Number
- AD0487548
Entities
People
- W. D. Laraway
Organizations
- Arnold Engineering Development Complex