scholarly journals Flow Characterization In Mine Ventilation Fan Blade Design Using CFD

2021 ◽  
Vol 20 (3) ◽  
pp. 144
Author(s):  
Anwar Endris Hassen
Keyword(s):  
Mine Ventilation ◽  
Blade Design ◽  
Flow Characterization ◽  
Fan Blade ◽  
Ventilation Fan

Fan Blade Design Methods: Cascade Versus Isolated Airfoil Approach — Experimental and Numerical Comparison

2016 ◽  
Author(s):  
Stefano Castegnaro
Keyword(s):  
Reynolds Numbers ◽  
Medium Size ◽  
Numerical Comparison ◽  
Blade Design ◽  
Axial Fan ◽  
Local Flow ◽  
Flow Features ◽  
Fan Blade ◽  
Mixed Approach ◽  
Cfd Analyses

Both cascade and isolated airfoil methods are considered valid in axial fan blade design, for high (σ≳1) and low (σ≲0.7) solidities respectively. For bladings that feature intermediate solidities the modified isolated approach is commonly employed. This method uses isolated airfoil data, with proper adjustments to take into account multiplane interference effects. Contrarily, the literature does not refer about modifications of the cascade approach to design medium solidity fans. Such method would use cascade data, properly adjusted for the blade sections at lower solidities. Thus, with the aim of comparing these two opposite design approaches (modified cascade versus modified isolated) for medium solidity blades, two free-vortex blading were designed for a 315 mm rotor-only axial fan and experimentally tested. CFD analyses were performed as well to obtain the local flow features. NACA-65 series airfoils were employed, as both cascade and isolated data are available for chord Reynolds numbers typical of axial fans applications. Results highlight the differences between the two approaches. Finally, a mixed approach that employs both isolated and cascade data is suggested as the most accurate one. Moreover, results also show the detrimental effects of the low chord Reynolds numbers on the performance of the blades. This effect should be taken into account in blade design for small-to-medium size machines.

Experimental and Numerical Study of Blade Profiles for Axial Flow Fans

1998 ◽  
Author(s):  
Veronique Henry
Keyword(s):  
Optimization Design ◽  
Numerical Study ◽  
Axial Flow ◽  
Leading Edge ◽  
Design Parameters ◽  
Blade Design ◽  
Aerodynamic Design ◽  
Design And Optimization ◽  
Expected Performance ◽  
Ventilation Fan

Abstract An experimental and numerical investigation is presented for blade profiles in axial flow fans. In order to improve the aerodynamic design of the blades, first numerical simulations with a two dimensional cascade oriented code have been performed in the rotor passage of a single-stage axial flow ventilation fan. The optimization design has been performed involving statistics. The influence of four design parameters have been investigated: rate of curvature, leading edge shape, chordwise location of the maximum camber and chordwise location of the maximum thickness. The new profile produced has been tested in wind-tunnel with a well-known C4 profile to validate the expected performance level. Next step has consisted in performing Navier-Stockes computations. Results demonstrate that the use of a coupled viscous-inviscid approach is appropriate for blade design and optimization. The Navier-Stockes code can be seen as a complementary tool as it leads to a complete description of the flow.

A study for stainless steel fan blade design with metal foam core

2014 ◽  
Vol 17 (1) ◽  
pp. 56-73 ◽  
Author(s):  
James B Min ◽  
Louis J Ghosn ◽  
Bradley A Lerch
Keyword(s):  
Stainless Steel ◽  
Metal Foam ◽  
Foam Core ◽  
Blade Design ◽  
Fan Blade
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