| Elvin |
 时间: 05-25 17:43
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Thanks! It a good online site! 9. Noise Reduction Strategies in High-Speed Axial Fan Design Axial fans particularly high-speed or high-pressure models are inherently prone to generating noise which presents a significant engineering challenge in commercial and industrial applications[12][18]. Fan noise is broadly categorized into two types: rotational （tonal） noise and broadband （turbulence） noise[17]. Rotational noise is caused by the regular passage of the blades past stationary components （like motor struts or guide vanes） and is heard as a distinct tone related to the Blade Passing Frequency （BPF）[17]. Broadband noise is caused by random flow turbulence such as air separation from the blade surface tip vortex shedding and turbulence in the incoming air[17]. Modern noise reduction strategies focus heavily on manipulating the blade geometry[4][17]. Blade sweep and skew—the backward curving of the blade—is one of the most effective methods as it spreads the pressure pulse of the blade passing |
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| Thad |
时间: 05-25 17:41
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| Roberthob |
时间: 05-25 17:39
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| Willy |
时间: 05-25 17:37
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| Vonnie |
时间: 05-25 17:34
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| Hilario |
时间: 05-25 17:34
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| Dominic |
时间: 05-25 17:32
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时间: 05-25 17:31
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时间: 05-25 17:29
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| Remona |
时间: 05-25 17:29
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