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.
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, 2026
, 32(1)
: 67
-82
.
DOI: 10.12066/j.issn.1007-2861.2696
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