Three dimensional numerical simulation on heat and mass transfer of rectangular eccentric corrugated fin-and-oval tube heat exchangers with different corrugated inclination angles(θ=0°

θ=5°

θ=10°

θ=15°

θ=18°)and inlet air velocities(from 0.5m/s to 4.0m/s)was performed by the FLUENT software.The effects Reynolds number(Re)and corrugated inclination angle(θ)on average Nusselt number(Nu)of the rectangular eccentric corrugated fin-and-oval tube heat exchanger surface

differential pressure lossΔPand finned tube heat transfer performance influence factor j/f were analyzed.The results show that:the comprehensive heat transfer performance of the rectangular eccentric plate-fin-and-oval tube heat exchanger is the best;properly increasing the front windward corrugated inclination angle and reducing the rear area corrugated inclination angle of the corrugated fin can enhance the heat transfer and reduce the resistance loss at the same time.