GROWTH OF THE TURBULENT INNER WAKE BEHIND LARGE SPHERES AT SUPERSONIC VELOCITIES,
Abstract
Experimental data are presented on the growth of the envelope of the turbulent inner wakes up to 3000 calibers behind 9/16, 3/4 and 2-inch spheres traveling at supersonic velocities. A description of the experimental technique and a discussion of its limitations for obtaining adequate data are given. Data are fitted to the equation r cubed 3 - bx sub e = c and the growth of the far wake is compared with theoretical predictions. Values of C sub D are computed using the coefficient b from this equation in the expression b = 1.85 KC sub D. Since there exists an aperiodic development of the wake envelope and since the small sample size of the data may bias the determination of the growth rate, the data from all available rounds were averaged to obtain values of C sub D. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1964
- Accession Number
- AD0453850
Entities
People
- Walter F. Braun
Organizations
- Ballistic Research Laboratory