基于LES的串列叶片气动及声学特性

doi:10.12066/j.issn.1007-2861.2696

Abstract

Abstract: To explore the aerodynamic and aeroacoustic performance of a newly designed tandem blade configuration, numerical simulations were conducted using large eddy simulation (LES) combined with the Ffowcs-Williams and Hawkings (FW-H) integral. The performance responsed to the change of blade spacing was also discussed. The results showed that under subsonic and moderate Reynolds number conditions (Ma = 0.21, Re = 7×10⁵), the noise generated by tandem blades mainly originated from the aft blade and it carried a broadband characteristic. Influenced by the downwash and upwash flows from the blade tip and root, the noise generated by tandem blades tended to be concentrated near the blade mid-span. As the blade spacing increased, the wake behind the fore blade became stronger as a result of enhanced energy accumulation, and the time delayed between the upstream and downstream blades became longer. This led to an increase in the total sound pressure level (SPL) and a shift of the acoustic energy toward lower frequencies.

Key words: tandem blade noise, large eddy simulation (LES), Ffowcs-Williams and Hawkings (FW-H) integral, blade spacing

CLC Number:

WEN Chuyi, TANG Xiaolong, DING Jue, YANG Xiaoquan, WENG Peifen. Large eddy simulation of aerodynamic and aeroacoustic performances of tandem blades[J]. Journal of Shanghai University（Natural Science Edition）, 2026, 32(1): 67-82.

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Large eddy simulation of aerodynamic and aeroacoustic performances of tandem blades

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