AERODYNAMIC RESISTANCE OF SMOOTH-PIPE STAGGERED BUNDLES IN A CROSS FLOW OF AIR AT HIGH RE NUMBERS,
Abstract
An experimental investigation was made of the resistance of five smooth-pipe staggered bundles a/b = 1.27 -1.94 in a cross flow of air in the interval Re of from 10,000 to 2,000,000. The dependence of the resistance of the bundles on the number of longitudinal rows z2 was investigated. It was established that the character of the resistance stabilizes at seven longitudinal rows and does not depend on further increase in the number of them. The results were evaluated in criterial form and the graphic dependences are given. Analysis of the material obtained showed that in the region Re = (1.8--1.6) x 100,000 there begins the transition into the self-modeling zone of developed turbulence. In close-staggered bundles (a/b< or =1.7), the self-modeling zone occurs immediately, but in less close ones (a/b>1.7) the automatic operation sets in after the transition zone. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 22, 1965
- Accession Number
- AD0622464
Entities
People
- P. S. Samoshka
- Yu. K. Stasyulyavichyus
Organizations
- National Air and Space Intelligence Center