Experimental investigations are performed on the single-row jet impingement heat transfer onto a semi-cylindrical concave surface. Two kinds of nozzle shapes are taken into consideration. They are circular nozzle and chevron nozzle. The semi-cylindrical concave surface has a diameter ratio （D/d） of 10. The jet-to-jet pitch is 5d. The experiments are conducted under three Reynolds numbers （Re=5 000， 10 000， and 20 000） and four dimensionless nozzle-to-surface distances （H/d=2， 4， 6， and 8）. The results show that both nozzles achieve their respective maximum stagnation Nusselt numbers at H/d=4. However， the longitudinally-averaged Nusselt number in the vicinity of concave leading is monotonously reduced with the increase of nozzle-to-surface distance in general. The chevron nozzle is confirmed to produce higher convective heat transfer than that of circular nozzle. In comparison with the circular nozzle jet impingement， the maximum increase of longitudinally-averaged Nusselt number at the concave leading is about 16% and the maximum increase of the locally area-averaged Nusselt number in the vicinity of concave leading （within ±2d） is about 18%， produced by the chevron-nozzle jet impingement.