Computational fluid dynamics investigation of air flow generated by ion wind around a LED heat sink
Résumé
This paper presents a CFD study of ion wind generated airflow which is corona discharge induced flow at the tip of a curved electrode and represents a new cooling method for light emitting diodes (LEDs). The details of a numerical study of the natural convection around the radial radiator with a central pole for the 200 W LED have been examined. The effect of input current and interelectrode distance has been analyzed. We found that the optimal plate wire distance is about 17.5 mm where the velocity in the measuring point is maximum and that beyond 7 mm the velocity is inversely proportional to the applied voltage which minimizes the cooling of LED.