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A polynomial Response Surface Approximation (RSA) model in order to achieve the optimized axial fan. To find the best optimal design, the gradient -based search algorithm has been employed. In 10 developed a new technique by using an optimization method based on the gradient method to design the axial flow fan with efficiency. Fan 1 not performing to specification. Fan not pulling full Amps. Fan performance 80% of design. Fan sounded like it was hunting eg in stall. Initial diagnoses was uneven air on conditions due to transition pieces. Damper in front of fans disruption air flow on to blades. Web: Facebook: LinkedIn: https://www.linkedin.com/company/cfd-support. CAE Software for Radial Fans A meanline approach is used to design axial, radial, and mixed-flow fans, both for single and for multiple stages. Use FANPAL™ to design the stage, analyze the performance, refine parameters with data reduction, and model the machine according to several performance models. The AxSTREAM® software platform for multidisciplinary design, analysis and optimization provides an integrated and streamlined approach to turbomachinery design. This best-in-class software solution encompasses the complete process for radial, axial and mixed flow turbomachinery design.
- Axial Flow Fans And Ducts
- Axial Flow Fan Curves
- Axial Fan Design
- Axial Flow Fan
- Axial Flow Fan Design Software Design
Axial Flow Fans And Ducts
In axial fans air is discharge parallel to fan axis.
Suitable for low static pressure applications where high flow rate is required
Motor generally inside air stream, direct drive.
Advantages of axial fans are: Low cost and high air volume.
Disadvantages of axial fans are: higher noise, less efficiency and Low static pressure.
Types of axial fans are: Tube Axial, Vane Axial and Propeller.
1- Vane Axial
The highest axial fan efficiency.78-85%
Medium static pressure applications up to 8 inches (2.0 KPa).
Generally have guide vanes inside the fan housing to reduce air turbulence.
Airfoil blades can be fixed, controllable or adjustable pitch.
Large hub diameter usually greater than half fan tip diameter.
Cylindrical tube housing, close to fan tip diameter.
Guide vanes are used to control airflow and fan static pressure. Guide vanes can be upstream or downstream from impeller.
By using controllers, vane axial fans were widely used to control air flow. High noise levels and high initial cost of vane axial fans with variable vane guides make it uneconomical comparing to variable speed motors.
ications like exhaust systems in fume exhaust, and some industrial applications.
2- Tube Axial
Peak Efficiency up to 67-72%
Suitable for low static applications up to 1″(250Pa).
Four to eight blades.
Medium hub diameter close to half fan tip diameter. (Hub-to-Tip Ratio)
Cylindrical tube housing, close to fan tip diameter.
Performance curve dips to left of peak pressure. Fan Operating in this region shall be avoided.
Circular pattern air discharge.
Fan blades can be fixed thickness cross section or airfoil blades.
Circular pattern air discharge.
Applications: Fan is suitable for ductless or short duct applications.
Tube axial fan
3- Propeller Axial:
Peak Efficiency up to 67-72%
Axial Fans Selection Software
Introduction
Fans Selector is a centrifugal and axial fans selection program, developed by Altec srl, that enables a manufacturer to select, calculate performance and printout a technical report of its fans production range.
By using Fan Selector software, the manufacturer can quickly and easily determine the most suitable axial and centrifugal fans for its demands.
After entering the basic conditions, the ideal product for every requirement can be found with just a few clicks. Furthermore, all necessary product information such as technical data, including noise calculations, total sound power spectrum, natural and operating frequencies, performance curve plotting and so on can be obtained.
The software is highly customizable, both from input data possibilities and from required outputs perspective, based on the needs of the single manufacturer.
The following is an example of the main window of the software, which shows the range of fans matching the given input conditions and the data and performance curves of a specific fan chosen inside the proposed list.
Input data
The software allows the user to specify a very detailed list of input data and parameters. The list of input can be tailored based on the manufacturer requests.
While some essential input data must mandatorily be specified, for some others an 'AUTO' option is available: in this case, if chosen by the user, the selection algorithm will consider all the fans matching all possible values for the input data. Finally, some parameters are already pre-filled in the input mask with default values, that can be freely modified by the manufacturer if needed.
This input criteria has a twofold purpose:
- It allows a very quick selection, by specifying only the mandatory input data and by leaving the AUTO option and the default values set in the remaining fields of the input mask
- It enables also a very detailed and specific selection, giving the user the possibility to specify a wide range of information for the fans to be selected
Axial Flow Fan Curves
The fans range selection
In a very quick and straightforward way, the software propose a set of fans that match the input criteria. For each equipment, the main performance data are displayed.
The following picture show an example of the selected fans range which match the input data referred in the previous section.
Fans selection parameters
In the selection phase, it is possible to specify some criteria to be applied to the calculation. In the example, two parameters are available:
Axial Fan Design
- Selection by max efficiency
- Selection by minimal sound power level
The results
By selecting one of the fan showed in the selection list, the detailed performance data and performance curves are showed in the 'Results' section of the main window of the program. The working point of the fan is also showed.
The printout
The user can print a technical report including all the required data about the selected fan and save it in PDF format.
The following is an example of the printout generated by the software and related to the example used in the previous sections.
Further improvements and developments
Altec is willing to satisfy all manufacturer's requests and needs: further improvements to the software are possible, if required by the customer, as well as the development of new modules in order to add new functionalities to the existing ones.
The introduction of these additional functionalities would require the cooperation of the manufacturer, which will provide to Altec the technical information regarding the specific topics.
Some example of possible improvements are listed in the following:
Axial Flow Fan
- Possibility to change the working point of the selected fan, in order to simulate the performance changes
- Pricing module: estimates the costs, areas, weights and labour hours
- drawings generation (in 2D and 3D)
- stresses calculation
Axial Flow Fan Design Software Design
These and further adding to the Fan Selector software described in the previous section need in depth discussion with the manufacturer and understanding of specific needs.