Based on the decline analysis of aerodynamic characteristic with leading edge erosion, the fan rotor of a small type and high bypass ratio turbofan engine is employed to investigate the leading edge maintenance method. Since the manually polished method may bring uncertainty to the blade aerodynamic characteristics because of its various leading shapes, this paper aims at the eroded leading edge, makes comprehensive controlling of leading edge with detailed parameters, and utilizes genetic algorithm to identify the best leading edge maintenance plan under geometric constrains. Numerical results show that optimum maintenance method of eroded leading edge could improve the aerodynamic characteristics obviously. Compared with the eroded blade, the best maintenance plan could increase the isentropic efficiency of fan rotor with 1.21% and 3.01% at the designed point and near stall condition showing good aerodynamic characteristics and nearly making the aerodynamic performance of repaired fan blade back to the initial level. The leading edge can significantly affect the development of boundary layer of suction surface, and the best maintenance plan can effectively reduce the thickness of boundary layer thickness near the leading edge and decrease the flow loss of the boundary layer.
SHI Lei
,
YANG Guang
,
DING Guanghua
,
LIN Wenjun
. Fine maintenance of an eroded fan rotor and related flow characteristics analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020
, 41(9)
: 423446
-423446
.
DOI: 10.7527/S1000-6893.2019.23446
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