The local heat transfer characteristic of synthetic air jet impinging on convex surface is studied experimentally. The heat flux on the convex surface is maintained constant. The experiment is carried out for different actuator frequency (f = 100 Hz–300 Hz), jet to plate distance (z/d = 1 to 8) keeping the orifice diameter constant. The local heat transfer characteristic of synthetic air jet on the convex surface is obtained by IR thermal imager using thin foil technique. Local heat transfer characteristics is studied in terms of local Nusselt number along the axial (x/d at r = 0) and radial direction (r/d at x = 0) of convex surface. The obtained result shows that the local heat transfer is strongly influenced by actuator frequency and jet to plate distance. The actuator frequency (f = 200 Hz) and lower jet to plate distance (z/d = 2) is observed effective at all jet to plate distance and actuator frequency. The correlation of maximum local Nusselt number in terms of Reynolds number is obtained with the maximum deviation of 18%. The maximum uncertainty in measurement of average Nusselt number is observed less than ±6%.

实验研究了合成空气射流撞击凸面的局部传热特性。凸面上的热通量保持恒定。实验针对不同的执行器频率 ( f  = 100 Hz–300 Hz)、喷射到板的距离 ( z/d  = 1 到 8) 进行，保持孔口直径恒定。利用薄箔技术通过红外热像仪获得了合成空气射流在凸面上的局部传热特性。局部传热特性根据沿轴向（x/d at r  =  0）和径向（r/d at x  =  0）的局部努塞尔数进行研究。) 的凸面。获得的结果表明，局部传热受致动器频率和射流到板距离的强烈影响。执行器频率 ( f  = 200 Hz) 和较低的喷射到板距离 ( z/d  = 2) 在所有喷射到板距离和执行器频率下均有效。获得最大局部努塞尔数与雷诺数的相关性，最大偏差为 18%。观察到平均努塞尔数测量的最大不确定度小于 ±6%。