Axial fans are used to transport gases. The medium to be transported is drawn in axially to the drive shaft of the axial fan by the rotation of the rotor. The medium flows through the rotor and is discharged axially behind the rotor.
The experimental unit provides the basic experiments to get to know the operating behaviour and the important characteristic variables of axial fans.
features an axial fan with variable speed via an integrated controller, an intake pipe and a delivery pipe. The transparent intake and delivery pipes are fitted with guide plates for flow guidance. A flow straightener in the intake pipe serves to calm the air. This enables precise measurements even with heavily reduced operation. The air flow is adjusted by a throttle valve at the end of the delivery pipe.
The experimental unit is fitted with sensors for pressure and temperature. The flow rate is determinated via differential pressure measurement on the intake nozzle.
The microprocessor-based measuring technique is well protected in the housing. All the advantages of software-supported experiments and evaluation are offered by the software and the microprocessor. The connection to a PC is made by USB.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
Learning Objectives / Experiments
Operating behaviour and characteristic variables of an axial fan
Recording the fan characteristic (differential pressure as a function of the flow rate)
Effect of the rotor speed on the pressure
effect of the rotor speed on the flow rate stall
determination of hydraulical power output and efficiencies
Specification
functioning and operating behaviour of an axial fan
Axial fan with electronically commutated drive motor
Variable speed via integrated controller
Transparent intake and delivery pipes
Throttle valve to adjust the air flow in the delivery pipe
Determination of flow rate via intake nozzle
Display of differential pressure, flow rate, speed, electrical power consumption and hydraulical power output, temperature and efficiency
Microprocessor-based measuring technique
Unit-specific software for data acquisition and operation via USB under Windows Vista or Windows 7