Evaluation of the Overall Root-Mean-Square Fluctuating Pressure Levels in the AEDC PWT 16-Ft Transonic Tunnel
Abstract
An investigation was conducted to evaluate the fluctuating pressures in the AEDC PWT 16-ft transonic wind tunnel circuit. Test results were obtained over a Mach number range from 0.6 to 1.3 and a unit Reynolds number range from 1.8 to 6.8 million. The influence of Mach number, total pressure, total temperature, and (auxiliary) plenum suction on the test section fluctuating pressures was determined. In addition, a comparison of the Tunnel 16T fluctuating pressures with those of the AEDC PWT 4-ft transonic tunnel and the NASA-Huntsville 14-in. transonic tunnel is made. A critical Mach number range was defined near a Mach number of 0.75. The maximum root-mean-square fluctuating pressure in the test section was 3.5 percent of the free-stream dynamic pressure in the critical Mach number range. The source of this maximum fluctuating pressure did not appear to be controlled by the compressor. The free-stream fluctuating pressure was found to vary inversely with the total pressure and to be relatively invariant with total temperature and auxiliary plenum suction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1970
- Accession Number
- AD0864827
Entities
People
- O. P. Credle
- T. O. Shadow
Organizations
- Arnold Engineering Development Complex