The heat transfer characteristics of flathigh-fin tubes and corrugated-high-fin tubes are investigated in the wind tunnel.It is found that the heat transfer effect of corrugatedhighfin tubes is 1.2 times better than that of flathighfin tubes.The corresponding correlation between Nusselt number and Reynolds number is obtained.The mean deviation of the experimental curve from the calculated one is 5.9% for corrugatedhigh-fin tubes,and 3.8% for flat-highfin tubes.Meanwhile,the pressure drop for corrugated-highfin tubes is 1.1 times as large as that for the flat-highfin tubes.The corresponding correlation between the friction factors and Reynolds number is also gained.The mean deviation of the experimental curve from the calculated one is 6.5% for corrugatedhighfin tubes,and 4.9% for flathigh-fin tubes.