Prediction of Performance of a Variable-Pitch Axial Fan with Forward-Skewed Blades

Xuemin Ye, Fuwei Fan, Ruixing Zhang and Chunxi Li
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Xuemin Ye: Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Fuwei Fan: Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Ruixing Zhang: Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Chunxi Li: Department of Power Engineering, North China Electric Power University, Baoding 071003, China

Energies, 2019, vol. 12, issue 12, 1-20

Abstract: For a single-stage variable-pitch axial fan, the aerodynamic performance and through flow with and without blade skewing are examined numerically. Simulated results show that the total pressure rise and efficiency increase by 2.99% and 0.16%, respectively, with the best forward-skewed angle of θ = 3° at the design conditions. At the blade pitch angles of β = 29° and 35°, the total pressure rises and efficiency of the fan with θ = 3.0° under the highest efficiency point change by −0.55%, −0.53% and 1.39%, 2.11%, respectively. At design and off-design conditions, the forward-skewed blades mitigate tip leakage and delay the emergence of separation flow at the blade root, these benefits are higher at the higher blade pitch angle. The θ = 3.0° forward skew effectively raises the stage performance of the impeller and guide vanes.

Keywords: variable-pitch axial fan; forward-skewed blades; aerodynamic performance; through flow (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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