JIN Guang-yuan, OUYANG Hua, DU Zhao-hui. Numerical analysis on tip leakage flow of circumferential skewed blades according to flow rates[J]. 2009, 24(9).
JIN Guang-yuan, OUYANG Hua, DU Zhao-hui. Numerical analysis on tip leakage flow of circumferential skewed blades according to flow rates[J]. 2009, 24(9).DOI:
Tip leakage flow in lower pressure axial flow fans with circumferential forward-skewed
backward-skewed and radical blade
were investigated numerically at the off-designation conditions and validated experimentally.The circumferential skewed effects on origination and development of tip leakage vortex were discussed according to flow rates.The results show that as flow rates decrease
tip leakage vortex origination move towards the leading edge
and circumferential skewing strengthen the mixing between tip leakage vortex and main flow;tip leakage vortex of forward-skewed blade is located most far from leading edge
vortex strength is weakest
and movement is slowest.The circumferential forward blades stabilize tip leakage flow
decrease end-wall losses at off-designation conditions and improve stable operation rang.