Abstract: In order to analyze the influence of the deflecting ring on the noise generated by an air conditioner outdoor set, the flow field in the outdoor set is simulated with the CFD software STAR-CD. The relative turbulent intensities are computed and the influence of the width and contoured duct of the deflecting ring on the noise generated by the outdoor set is analyzed. The results of computation and experiment show that an optimal width of the deflecting ring exists to make the noise generated by the outdoor set minimum. In addition, a double contoured duct is designed on the basis of the influence of the contoured duct of the deflecting ring on the noise generated by the outdoor set. The computation and experiment can validity that the deflecting ring with double contoured duct can improve the aerodynamic performance and reduce the noise generated by the outdoor set.

Key words: Air-conditioner, Outdoor set, Deflecting ring, Relative turbulent intensity, Simulation