Abstract: The heat transfer characteristic of semi-ellipse vortex generators that are arranged in double and single mode is simulated with numerical method. The calculation mode is based on air-water steady counter-flow heat transfer state, and the angle of attack is from 0°to 90°. The calculation Re number is from 6 000 to 48 000. The result shows longitudinal vortex and stream-wise vortex could be induced with vortex generator. It indicates that vortex generator could enhance convection heat transfer in fluid flow. Also, the longitudinal vortex plays main role in heat transfer enhancement.

Key words: Pressure drop, Heat transfer enhancement, Vortex, Vortex generator