Abstract
The multiple jets are often used to obtain the high heat transfer in the wide area. The heat and flow of multiple jets show more complicate characteristics due to the existence of the interactions between adjoining jets, and between jets and spent flows. To clarify the influence of the flow behavior on heat transfer fields, the time and spatial heat transfer profiles over the impingement plate were measured using an infrared radiometer when four jets impinge to the impingement plate for various jets arrangement and separating distance from jet exit to the impingement plate. The flow fields were also visualized with water table. The heat transfer characteristics make a clear from the results of the instantaneous heat transfer contour or temperature fluctuation values.
