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Design of Unequally-Spaced Blade Arrangement for Tonal Noise Reduction
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 Title & Authors
Design of Unequally-Spaced Blade Arrangement for Tonal Noise Reduction
Kim, Wan-Gi; Yun, Jong-Hak; Han, Seong-Su; Jeon, Se-Jong; Seong, Hyeong-Jin;
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A numerical simulation was made to delineate the re-distribution of tonal noise generated from the equally-spaced blade passing frequency (BPF). A pressure-wave model was employed to analyze the tonal noise. An optimal solution for diversifying the tonal peak noise was obtained by rearranging the unequally-spaced blade angles. This was based on the fact that the noise energy is transferred from BPF to the neighboring frequency band. A limit condition for the minimum blade angle spacing was imposed. The unbalancing problem was also considered to avoid the weight bias.
Fan Noise;Unequally-Spaced Blade;Pressure Wave Mode;
 Cited by
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