期刊
JOURNAL OF HYDRODYNAMICS
卷 19, 期 5, 页码 579-586出版社
SPRINGER
DOI: 10.1016/S1001-6058(07)60156-5
关键词
low pressure axial flow fan; circumferential skewed blade; aerodynamic performance; exit flow field; Stable Operating Range (SOR)
类别
资金
- National Natural Science Foundation of China [50406017]
In this article, the low pressure axial flow fan with circumferential skewed rotor blade, including the radial blade, the forward-skewed blade and the backward-skewed blade, was studied with experimental methods. The aerodynamic performance of the rotors was measured. At the design condition at outlet of the rotors, detailed flow measurements were performed with a five-hole probe and a Hot-Wire Anemometer (HWA). The results show that compared to the radial rotor, the forward-skewed rotor demonstrates a wider Stable Operating Range (SOR), is able to reduce the total pressure loss in the hub region and make main loading of blade accumulating in the mid-span region. There is a wider wake in the upper mid-span region of the forward-skewed rotor. Compared to the radial rotor, in the backward-skewed rotor there is higher total pressure loss near the hub and shroud regions and lower loss in the mid-span region. In addition, the velocity deficit in the wake is lower at mid-span of the backward-skewed rotor than the forward-skewed rotor.
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