Influence of Leading Edge Extending of Tip Winglet on Fan Performance
LI Min
WEI Dongshuo
LIANG Kunfeng
FAN Chenyang
LIU Jinglong
HE Haijiang
Abstract：An axial flow fan was taken as the research object,the influence of the leading edge extending of the tip winglet on the fan performance was studied through experiments and numerical simulations.The results show that extending the leading edge of the tip winglet significantly reduce the leakage rate and the size and intensity of the leakage vortex in the tip region,the tip leakage rate reduce by 0.03％.In the vortex structure identified by the Q criterion,the size of the leakage vortex is smaller at each moment from its formation to its shedding.Additionally,the vortex core is closer to the suction surface,reducing the mixing effect between the leakage vortex and the mainstream,narrowing the disturbance range,and improving the static pressure efficiency of the fan.At the same time,the amplitude and intensity of pressure pulsation at the tip clearance and the leading edge position of the tip are significantly reduce,with the pressure pulsation amplitude decrease by 200 Pa and 300 Pa,respectively,and the pressure pulsation intensity decrease by 0.002 and 0.040,respectively,enhancing the stability of the flow field.Extending the leading edge of the tip winglet improv the static pressure efficiency of the fan in the flow range of 2～6 m3/s,with the static pressure efficiency at the design operating point(the inlet volume flow rate is 5.2 m3/s)increase by 1.02％.Extending the leading edge of the tip winglet reduce noise in all frequency bands from 0～10000 Hz,with the total sound pressure level and total sound power level at the design operating point decrease by 1.5 dB(A)and 1.7 dB(A),respectively.
Keywords：axial flow fantip wingletextending the leading edgeleakage vortexnoisestatic pressure efficiency
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 20-30 )