Winglet-type vortex generators for plate-fin heat exchangers using triangular fins

Vortex generators in the form of delta winglet pairs have already been prop osed by many reseachers for enhancement of the heat transfer rate in plate- fin heat exchangers. In this work, the enhancement potential of triangular fins (which are widely used inserts between the plates of the plate-fin hea t exchanger) having delta winglets mounted on their slant surfaces has been computed The performance of this combination is evaluated for varying angl es of attack of the winglet and different thermal boundary conditions. The performance of the combination of triangular fins and winglets,with stampin g on the slant surfaces also has been evaluated.