Доступ предоставлен для: Guest

ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Heat Transfer Enhancement and Flow Characteristics of Drag-Reducing Surfactant Aqueous Solutions Using Turbulent Promoters

Get access (open in a dialog) DOI: 10.1615/IHTC12.5200
6 pages

Аннотация

In this paper, characteristics of fluid flow and heat transfer of a drag-reducing dilute cationic surfactant solution in a channel and a tube are investigated to realize a highly efficient thermal transportation system.I t is attainable for the reduction of the turbulent frictional drag by dilute surfactant aqueous solutions. However, many investigations, which are of full drag-reducing flow without disturbance, have showed that the heat transfer is reduced simultaneously.I n order to recover the reduced heat transfer, the effect of some turbulent promoters and a row of delta winglets that generates the longitudinal vortices were tested in a two-dimensional channel. Further, the examination on the relation on the relation between heat transport and momentum one was carried out; it was found that the critical velocity corresponding to the critical Reynolds number at which the drag-reduction effect reaches a maximum value only depends on the concentration of the surfactant solution.