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HM 280 Experiments with a Radial Fan
Education / GUNT Hamburg / Fluid Mechanics and Hydrology / Hydraulic Fluid Energy Machines /

Radial fans are used to transport gases with non-excessive pressure differences. 
  The experimental unit HM 280 provides the basic experiments to get to know the operating behaviour and the important characteristic variables of radial fans. The software for data acquisition and visualisation makes the experiments especially clear and enables fast execution of experiments with reliable results. 
  The radial fan with flanged drive motor features free speed adjustament. The transparent intake and delivery pipes enable stable stationary flow conditions. The air flow is set by a throttle valve at the end of the pressure pipe. 
  To demonstrate the effect of different blade shapes two impellers are included in the scope of delivery: one impeller with forward curved blades and one with rear curved blades. The impellers are easy to replace.

  Using the software the differential pressure, flow rate, speed, power and temperature are displayed and characteristics recorded. The flow rate is determinated via measured differential pressure.
  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

  a radial fan
  * record fan characteristic (differential pressure as a

    function of the flow rate)
  * calculate the flow rate from the measured

    differential pressure 
- effect of different impeller shapes on the fan

  characteristic and efficiency
- effect of the impeller speed on the efficiency and

  delivery data


[1] investigation of the flow rate and differential pressure in the model of a radial fan
[2] radial fan with drive motor
[3] adjustable speed
[4] interchangeable impellers: 1 impeller with forward curved blades and 1 impeller with rear curved blades
[5] transparent intake and delivery pipe 
[6] throttle valve to adjust the air flow
[7] determination of flow rate via measured differential pressure

[8] display of differential pressure, flow rate, speed, power and temperature
[9] LabVIEW software for data acquisition via USB under Windows XP,  Windows Vista or Windows 7 

Technical Data
Intake pipe
- inner diameter: D=90mm
- length: L=430mm
Delivery pipe
- inner diameter: D=100mm
- length: L=530mm
Radial fan
- power consumption: 110W
- speed: 2.800min-1
- max. flow rate: 480m³/h
- max. differential pressure: 300Pa
Measuring ranges 
- pressure: 0...1.800Pa
- flow rate: 0...1.000m³/h
- temperature: 0...100°C
Dimensions and Weight
LxWxH: 670x340x940mm
Weight: approx. 20kg
Required for Operation
230V, 50/60Hz, 1 phase
Scope of Delivery

1 experimental unit
2 impeller

1 LabVIEW software CD + USB cable
1 set of instructional material

Order Details

070.28000  HM 280  Experiments with a Radial Fan