Accession Number : AD0694752

Title :   FRICTION AND HEAT TRANSFER IN TWISTED FLOW INSIDE A PIPE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Migai,V. K.

Report Date : 14 MAY 1969

Pagination or Media Count : 14

Abstract : Approximate calculations of the characteristics of heat exchange and friction during turbulent flow in tubes with band-type vortex generators are compared with experimental results obtained on an air unit. Graphs are given for hydraulic friction in tubes with band-type vortex generators, heat exchange in tubes with band-type vortex generators, effect of the Prandtl number on the efficiency of heat exchange in a turbulent flow, and power comparison of band-type vortex generators. The results show that band-type vortex generators are most efficient at relatively small values. On the other hand, wire type spiral vortex generators are more efficient at large values although band-type vortex generators are still preferable at low Reynolds numbers. (Author)

Descriptors :   (*TURBULENCE, *HEAT TRANSFER), (*SKIN FRICTION, PIPES), VORTEX GENERATORS, EFFICIENCY, PRANDTL NUMBER, USSR

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE