A self-contained, fl oor-standing mobile unit that includes an axial fan, duct and instrumentation. It allows students to study and perform tests on an axial fan, to understand how it works and calculate its performance
Key features
• Part of TecQuipment’s Modular Fluid Power range that connects with the Universal Dynamometer (MFP100) as a common motive power source for a cost-eff ective solution
• Allows students to study and test a popular type of rotodynamic machine safely and at a realistic scale
• Multiple pressure measurement points along the fan duct allow students to examine a full range of performance characteristics
• Connection plate with schematic diagram clearly shows the air fl ow circuit and how the parts of the module connect to each other
• A traversing, calibrated pitot tube allows investigations of velocity distribution
• Includes a digital multi-input pressure display
• Can be used with TecQuipment’s Versatile Data Acquisition System (VDAS®)
• Includes an effi cient exhaust silencer to reduce noise
Description
For use with and driven by the Universal Dynamometer (MFP100, available separately), the Axial Fan Module is part of TecQuipment’s Modular Fluid Power range. The Axial Fan Module is ideal for student experiments, demonstrations and projects.
Axial fans move air in a wide range of applications from ventilation in domestic and commercial buildings to mines and agriculture. For these reasons it is important for engineers to be able to study and understand the characteristics of axial fans.
The module has an axial fan mounted in a cylindrical steel duct. Air enters the duct through an inlet nozzle. The pressure at a set of tappings just downstream of the nozzle allows calculation of the inlet air fl ow rate. A slide-valve (downstream of the fan) controls fl ow rate and delivery pressure. Air exits the duct through a silencer to reduce noise in the laboratory.
TecQuipment’s Universal Dynamometer measures the speed, torque and power of the axial fan. Two more sets of pressure tapping points measure the pressure diff erence across the fan. Each tapping point has three tappings arranged at 120-degree separation around the duct to give a good average value at that location. A traversing Pitot tube with a calibrated scale allows students to fi nd the velocity distribution across the duct. The Pitot tube fi ts to a choice of two positions, to allow students to move it across the duct in two axes.
For quick and reliable tests, TecQuipment can supply its optional Versatile Data Acquisition System(VDAS®). This gives accurate real-time data capture, monitoring and display, calculation and charting of all the important readings on a computer (computer not included). VDAS® will also log the position of the optional Pitot-Static Traverse (MFP107a).
Learning outcomes
• Characteristics of an axial fan, including head against fl ow effi ciency
• Relationship between power and speed (Power Law)
• Velocity distribution in a round duct
• Calibration of an inlet nozzle
• Duct resistance and matching to fan to fi nd operating point
Essential Base Unit
• Universal Dynamometer (MFP100)
