Three-dimensional numerical simulations were conducted to investigate the convective heat transfer on a wedge-shaped concave surface subjected to staggered offset impinging jets. Under the presented parameters

such as offset spacing ratio (L/d) of 0-2.5

jet to concave leading edge spacing ratio (H/d) of 6-12

and jet Reynolds number (Re) of 10000-28000

the results showed that staggered offset of the impinging jets introduced complicated vortex flow inside the concave cavity and enhanced the local heat transfer correspondingly to the impingement stagnation zone. By comparison with the jets arranged in a line

relative little staggered offset of the impinging jets enhanced the laterally-averaged Nusselt number in the vicinity of concave leading edge. With the increase of offset spacing ratio

the chordwise location corresponding to the maximum laterally-averaged Nusselt number moved downwards. To improve the laterally-averaged Nusselt number in the vicinity of concave leading edge while maintaining local heat transfer capacity at the leading edge

the offset spacing ratio of 1 approximately is more appropriate.