Axial Flow Fan Design Parameter Affecting the Performance (original) (raw)
Related papers
Of Literature on Design of Axial Flow Fan
2017
The Axial Flow Fans are used everywhere in the world during a wide verity of industries and a number of the necessary applications are in the steam power plant, ventilation, refineries, and a lot of cooling purposes. Several researchers are devoted their effort to design fans to fulfills the actual demand of application within the most effective manner. There are various consideration are taken in mind for the design of the fan such as cost of the fan, ease in manufacture, low energy consumption, light weight, low noise level, higher fan efficiency, high volume flow rate, static pressure, space limitation, operating temperature and other parameters. Many studies are obtained from various researchers by the analysis and simulations of axial flow fans. Performance of axial flow fans and design of various sections are obtained from experimental and numerical analysis on the different parameter variations.
Experimental Investigation on Aerodynamic Characteristics of an Axial Flow Fan
The prime objective of this work is to determine the relationship between the mechanical and aerodynamic characteristics of the fan when the blade position is default and when it is changed and to find out which position gives optimum output at given power and given working conditions and according to the change of environment. In this experiment, the aerodynamic characteristic of an axial flow fan is going to be determined by measuring the static and total pressures in the suction and discharge sides of the fan for various flow rates. In this experiment, for different blade angle, flow velocity is measured and relationship between the change of blade angles and the flow velocity are plotted
Analysis and Validation of Blade with Skewed Angle for Axial Fan
The main aim of this research is to investigate the impact with a point of skew on the blade of the axial fan by calculating mass flow, rotor velocity, and pressure acting on the fluid by the fan's blade to obtain optimal efficiency. It has been observed that fluctuations in mass flow due to higher rotational speed (rpm) lead to an uneven distribution of the outlet speed of the flow line located in the ventilation hole of the stator, leading to a lower noise level. The mass flow rate is directly proportional to the performance, and pressure drop of the axial fan. The present work is carried out by considering a range of angles of (0º to 6º) for its rotor blade using trial and error in the CFD technique, we observe the axial fan handles the good volume of air at relatively low pressure and delivers good efficiency in the output airflow. Consequently, the axial fan is designed to operate on high static pressure. This manuscript consists of the computation of the aerodynamic performances of symmetrical blade profiles of a fully axial fan by Computational Fluid Dynamics (CFD) methods, developing a methodology for the design of axial fans, and analysis of the designed fan with CFD methods.
Experimental and Numerical Investigation onto 1250mm Axial Fan
Applied Mechanics and Materials, 2012
Numerical simulation is of interest for most fan designers to optimize the fan designs. Computational fluid dynamic (CFD) has become an essential tool in almost every branch of fluid dynamics and one of the major tools for fan designs. As the fan designers relying on the numerical simulation, the accuracy of tools such as CFD in predicting the performance has become a subject of interest. This paper validates the CFD modeling of an axial fan design against experimental result. The experimental rig and test procedure are developed with reference to “AMCA standard 210”. The analysis is conducted on 1250mm diameter axial fan with two different blade pitch angle 30° and 40°. Prior to encounter the swirling effect and deflection of velocity vector due to rotor blade, a stator blade with the same profile as rotor blade is used as the outlet guide vanes in opposite direction. The computational model is created according to the experimental condition and applied realistic boundary condition...
Analysis and Simulation of Axial Fan Using CFD
The aim of this study is to analyze a nine-bladed axial fan, standard specifications are used to generate a framework of axial fan efficiency. Using currently available CFD programs, the research is carried out in an efficient manner. At the inlet, results were obtained using typical boundary conditions, with fluid conditions at the outlet. The results showed a higher pressure of 381.62 Pa and a maximum velocity of 37.5 m/s at the outlet for these conditions. These results can also be used to compare the performance of a nine-blade axial fan with a nineand twelve-blade axial fan.
REVIEW OF NUMERICAL ANALYSIS OF AEROFOIL SECTION OF BLADE OF AXIAL FLOW FAN
Fans are used all over the world in a wide verity of industries and other purposes. Some of the important applications are in steam power station, ventilation system, cooling of electric motor and generator, and many industrial processes. Many researchers and engineers are making their efforts to design fans to fulfill the particular requirement of application in the most efficient way. The criterion of cost of fan, ease in manufacture and conservation of energy are other also to be considered in design. Several studies are available of various researchers in analysis and simulation of axial and centrifugal fans. Axial flow fans have also been designed and simulated by the researchers. Simulation of performance of axial flow fans and design of various blade sections of the axial flow fans have been studied experimentally or numerically. The present work comprises the numerical study of the axial flow fan section aerofoil. The objective of the study is to simulate the flow features around the aerofoil of particular design for three different values of the striking angle. The results are obtained using FLUENT in the form of velocity vectors at the leading edge, across the aerofoil and at the trailing edge. The contours of pressure and turbulence are also shown for the three cases.
The Effect of Tip End-Blade Geometry on the Axial Fans Performance
A numerical study is carried out to investigate the effect of the addition of winglet to the end of blade on the axial fan performance. Validation and assessment of the used computer program FLUENT 6.2, is carried out by comparing its result with previous researcher. Simulation is then carried out to analyze the flow pattern with and without a winglet attached to the fan blade. Velocity distribution produced numerically showed that the winglet suppresses the secondary flow at the tip gap. Pressure distributions also confirmed the winglet advantages. Calculated performance of the fan used showed general increase of the fan efficiency with 3.5% above those without winglet at the optimum efficiency point and with up to 6 % at off design point.. 1. INTRODUCTION Fans demand minimum gaps in order to facilitate operation, this gap tip clearance flow is known to have detrimental effects on the axial fans performance. The static pressure difference between the suction and the pressure side o...
2010
The study of Aerodynamic performance of axial-flow fans was carried out. Two fans that differ only in the thickness of their blades were studied. The first fan (Fref), which is the reference, was designed to be part of the cooling system of an automotive vehicle power unit and has conventional thin blades. The second fan (Ftck) has much thicker blades compatible with the rotomoulding conception process that generates only hollow parts with large edge radius. The global performances of the fans were measured in a test bench designed according to the ISO-5801 standard. The curve of aerodynamics characteristics (pressure head versus flow rate) is slightly steeper for the fan with thick blades, and its efficiency is lower than the efficiency of the fan with thin blades. To go further in the comparison, we also studied the wall pressure fluctuations at the casing wall in another normalized test bench, for two flow rates corresponding to the maximum efficiencies of the two fans. The total...
Design & Flow Features of Axial Fan Used in an Air Cooled Heat Exchanger by Experimental Analysis
2014
A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. The role of air flow plays vital role in heat exchanger. Presently heat exchangers use the air flow rate of 5-6 m 3 /s which gives less efficiency. Therefore the design of more than 7 m 3 /s air flow rate in the heat exchanger is done to maintain better efficiency. The required parameters of air flow fan are air flow, operating temperature, static pressure, Nominal fan speed, External diameter. The modification in existing fan was done and desired air flow optimum velocity was achieved 15.23 m/s at circular duct and 6.675 m/s to archive required parameters.
Modeling And Simulation Of Axial Fan Using Cfd
2015
Axial flow fans, while incapable of developing high<br> pressures, they are well suitable for handling large volumes of air at<br> relatively low pressures. In general, they are low in cost and possess<br> good efficiency, and can have blades of airfoil shape. Axial flow fans<br> show good efficiencies, and can operate at high static pressures if<br> such operation is necessary. Our objective is to model and analyze<br> the flow through AXIAL FANS using CFD Software and draw<br> inference from the obtained results, so as to get maximum efficiency.<br> The performance of an axial fan was simulated using CFD and the<br> effect of variation of different parameters such as the blade number,<br> noise level, velocity, temperature and pressure distribution on the<br> blade surface was studied. This paper aims to present a final 3D CAD<br> model of axial flow fan. Adapting this model to the available<br> componen...