Abstract
The device made of fan and pin-fin heat sink should be a powerful heat sink for LED lamp. This study used transient liquid crystal experimentation to measure the end-wall heat transfer coefficient of linearly arrayed square pin array in the rectangular channel, and discussed the influence of longitudinal spacing on heat transfer. The relative transverse spacing (XT = ST/d) was set as 3, and the relative longitudinal spacing (XL = SL/d = 1.88−5) and the Reynolds number (Re = 11047−17937) were changed. Considering the endwall area, the average Nusselt number with square pin was 1.46−2.58 times of that without square pin, and the square pin array of XL = 3.75 had the maximum end-wall heat transfer gain.
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