unevenBLADE (uneven BLade Acoustic Development Engine) is a tool for generating impeller or fan configurations in which the individual blades are unevenly distributed around the circumference. By unevenly spacing the blades, there is a frequency modulation that occurs, which causes the acoustic energy from the blade passage to get distributed to other harmonics of the fundamental, which can sometimes create lower noise levels or a more pleasing tonal structure. This program uses a random spacing algorithm, as oppossed to some other methods of uneven spacing, like sinusoidal spacing.
Current Features:
- Generates upwards of thousands of different unevenly spaced fan/impeller/rotor designs for any ressonable number of blades
- All geometric configurations are statically balanced, such that the center of mass lies on the center of rotation
- Variable randomness on how chaotic the blades are spaced out
- Presents three optimized configurations: one optimized for minimized blade passage frequency, one optimized for the lowest RMS noise level, and one that balances tonal and broadband noise
- All resulting designs are realizable
Sources:
[1] B. Jiang, J. Wang, X. Yang, W.Wang, and Y. Ding, "Tonal noise reduction by unevenly spaced blades in a forward-curved-blades centrifugal fan," Applied Acoustics, vol 146, pp. 172-183, 2019.
引用
Max Lacoma (2024). unevenBLADE v2.0 (https://www.mathworks.com/matlabcentral/fileexchange/161651-unevenblade-v2-0), MATLAB Central File Exchange. 取得済み .
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作成:
R2023a
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