Impingement of a round jet on a flat surface

Abstract

The impingement of a jet on a solid surface is of interest in many engineering problems, such as paint spraying, jet-blast drying, shielded-arc welding, and particularly in connection with the operation of vertical-take-off-and-landing aircrafts. Several investigations [4–11] were made over the past few years on associated flow phenomena, but none of them seemed exhaustive enough for the flow behavior to be accurately predicted. A series of experiments was therefore performed on a low-speed round turbulent jet of air impinging normally on a flat surface for a wide range of parameters concerned.