Investigation on Anti-Stall Ring Aerodynamic Performance in an Axial Flow Fan

2014 ◽  
Author(s):  
Alessandro Corsini ◽  
Giovanni Delibra ◽  
Franco Rispoli ◽  
Anthony G. Sheard ◽  
David Volponi
Keyword(s):  
Axial Flow ◽  
Aerodynamic Performance ◽  
Axial Flow Fan

OVERVIEW OF THE BEST 2020 AXIAL-FLOW FAN DATA AND INCLUSION IN SIMILARITY CHARTS FOR THE SEARCH OF THE BEST DESIGN

2022 ◽  
pp. 1-19
Author(s):  
Massimo Masi ◽  
Piero Danieli ◽  
Andrea Lazzaretto
Keyword(s):  
Axial Flow ◽  
Aerodynamic Performance ◽  
Design Parameters ◽  
Axial Fan ◽  
Axial Flow Fan ◽  
General Picture ◽  
Fan Performance ◽  
Global Performance ◽  
Present Design ◽  
Statistical Survey

Abstract The paper deals with the aerodynamic performance of ducted axial-flow fans available in the 2020 market and aims to create a general picture of the best designs and design trends, as a tool for fan designers. To this end, the paper first presents the general formulation of the similarity approach to the fan performance analysis, including the effects of rotational speed (which affects the validity of the Reynolds similarity) and turbomachine size (which can hinder the perfect geometrical similarity of some shape details). The second part reports a statistical survey of the axial-flow fan performance based on data from catalogues of major manufacturers, and compares the resulting Cordier-lines with optimum fan designs from empirical or CFD-based models available in the literature. In addition to the global performance at maximum aeraulic and total-to-static efficiencies, this survey uses the form of dimensionless Balje-Cordier charts to identify the trends and values of other design parameters, such as hub-to-tip ratio, blade count, and blade positioning angle. As a result, a summary of the aerodynamic performance of year 2020 best designs, the improvements achieved during the last forty years, and the present design trends in contra-rotating, vane-axial, and tube-axial fan types are made available to fan designers.

The Effects of Blade Loading Distribution and Blade Stacking on Aerodynamic Performance of a Semi-Open Type Axial Flow Fan

2016 ◽  
Vol 2016 (0) ◽  
pp. J0520305
Author(s):  
Yu KUWANO ◽  
Masato FURUKAWA ◽  
Kazutoyo YAMADA ◽  
Satoshi GUNJISHIMA ◽  
Naohiko HONMA ◽  
...  
Keyword(s):  
Axial Flow ◽  
Aerodynamic Performance ◽  
Axial Flow Fan ◽  
Blade Loading ◽  
Open Type

Investigation of aerodynamic performance of small axial flow fan coupled with deflecting ring

2015 ◽  
Vol 231 (10) ◽  
pp. 1839-1848
Author(s):  
Haihong Huang ◽  
Zheng Wang ◽  
Zhifeng Liu
Keyword(s):  
Great Influence ◽  
Axial Flow ◽  
Maximum Flow ◽  
Aerodynamic Performance ◽  
Axial Flow Fan ◽  
Suction Surface ◽  
Open Type ◽  
Pressure Surface ◽  
Closed Type ◽  
Small Axial Flow Fan

Experimental and numerical investigations on the effect of deflecting rings featuring different axial lengths on aerodynamic performance of the small axial flow fan were conducted under the condition of maximum flow rate. Two deflecting rings, the semi-open type and closed type, were investigated. Aerodynamic and aeroacoustic performances have been measured in experiment, and key analysis of flow was based on computational fluid dynamics results. The numerical and experimental results show that the deflecting ring has great influence on the performance of an axial flow fan. For the semi-open-type deflecting ring, the fan has better P-Q performance and higher efficiency; pressure, vorticity, and vorticity gradient distributions on the blade surface are more uniform; and noise level of the fan is lower at wider frequency bands. For the closed-type deflecting ring, the performance curve has a convex feature; blade pressure difference between the pressure surface and the suction surface is much bigger. The result shows that better aerodynamic and aeroacoustic performances of the axial flow fan can be acquired when the semi-open-type deflecting ring is adopted.

Overview of the Best 2020 Axial-Flow Fan Data and Inclusion in Similarity Charts for the Search of the Best Design

2021 ◽  
Author(s):  
Massimo Masi ◽  
Piero Danieli ◽  
Andrea Lazzaretto
Keyword(s):  
Axial Flow ◽  
Aerodynamic Performance ◽  
Design Parameters ◽  
Axial Fan ◽  
Axial Flow Fan ◽  
General Picture ◽  
Fan Performance ◽  
Global Performance ◽  
Present Design ◽  
Statistical Survey

Abstract The paper deals with the aerodynamic performance of ducted axial-flow fans available in the 2020 market and aims to create a general picture of the best designs and design trends, as a tool for fan designers. To this end, the paper first presents the general formulation of the similarity approach to the fan performance analysis, including the effects of rotational speed (which affects the validity of the Reynolds similarity) and turbomachine size (which can hinder the perfect geometrical similarity of some shape details). The second part reports a statistical survey of the axial-flow fan performance based on data from catalogues of major manufacturers, and compares the resulting Cordier-lines with optimum fan designs from empirical or CFD-based models available in the literature. In addition to the global performance at maximum aeraulic and total-to-static efficiencies, this survey uses the form of dimensionless Balje-Cordier charts to identify the trends and values of other design parameters, such as hub-to-tip ratio, blade count, and blade positioning angle. As a result, a summary of the aerodynamic performance of year 2020 best designs, the improvements achieved during the last forty years, and the present design trends in contra-rotating, vane-axial, and tube-axial fan types are made available to fan designers.

Numerical and experimental study on aerodynamic performance of small axial flow fan with splitter blades

2013 ◽  
Vol 22 (4) ◽  
pp. 333-339 ◽  
Author(s):  
Lifu Zhu ◽  
Yingzi Jin ◽  
Yi Li ◽  
Yuzhen Jin ◽  
Yanping Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Axial Flow ◽  
Aerodynamic Performance ◽  
Axial Flow Fan ◽  
Small Axial Flow Fan

Aerodynamic Performance of Advanced Axial Flow Fan for Power Industry Within its Operational Range

2014 ◽  
Author(s):  
V. Cyrus ◽  
J. Cyrus ◽  
P. Wurst ◽  
P. Panek
Keyword(s):  
Flow Separation ◽  
Three Dimensional ◽  
Axial Flow ◽  
Aerodynamic Performance ◽  
Rotor Blades ◽  
Design Flow ◽  
Axial Flow Fan ◽  
Angle Variation ◽  
Inlet Conditions ◽  
Inlet Chamber

The investigated axial flow fan investigated in our paper consisted of an advanced axial flow stage, an inlet chamber and a diffuser. The fan stage with high aerodynamic loading and the hub/tip ratio of 0.6 had the design flow and pressure coefficients of 0.60 and 0.83, respectively. The test and computed CFD aerodynamic performance of the axial flow fan and the fan’s stage were compared, with acceptable results. Subsequently, analysis of the computed 3D flow was carried out within the wide working range at the rotor blades stagger angle variation of ±20°.Consequence of the rotor blades adjustment is that the blade elements work often at the off-design working conditions with the flow separation on the blades suction and pressure sides. The flow is strictly three-dimensional. Velocity profile distortion and swirl due to the flow separation in the stator blade row decreases the diffuser pressure recovery and efficiency. The diffuser in the axial flow fan environment achieves a significantly higher efficiency in comparison with conical diffuser furnished with ducted-flow inlet conditions due to the increased turbulent mixing. Inlet chamber loss coefficient slightly decreased with the increasing flow rates due to the Reynolds number effect. Core flow in the inlet chamber is without occurrence of significant vortex inducing motion with the exception of the area near the tube where the fan’s shaft is located.

Sign in / Sign up

Export Citation Format

Share Document