Compressible Flow Unit Didactic Equipment Teaching Electrical Automatic Trainer

Item No.: MR HM230
Compressible Flow Unit Didactic Equipment Teaching Electrical Automatic Trainer
MR HM230 Compressible Flow Unit Didactic Equipment Teaching Electrical Automatic Trainer
Compressible fluids change their density due to pressure change in the flow. Flows with velocities less than Ma 0,3 are regarded as incompressible and the change in density is negligible. At higher velocities, the density has to be included in calculations. These conditions must be taken into consideration when designing e.g. turbo compressors, jets and fast planes.
A radial fan with infinitely variable speed control draws in air from the environment. At the intake the air flow is accelerated in a measuring nozzle. Further down the measuring section the air flows through interchangeable measuring objects. Drawing in the air and the arrangement of the measuring objects on the intake side of the fan minimise turbulence when flowing into the measuring objects. All measuring objects are made of transparent material and provide excellent insight into the inner structure. Pressure losses are studied in a pipe elbow, various pipe sections and a nozzle with sudden enlargement. The nozzle with gradual enlargement (de Laval nozzle) provides an introduction to the topic of sonic flow. The volumetric flow rate is measured in an orifice using a differential pressure manometer. The orifice is fitted with four interchangeable orifice disks for different measurement ranges. The fan’s characteristic curve can also be recorded by using a throttle valve.

1.investigate flow of compressible fluids
2.subsonic and sonic air flow
3.variable speed on the radial fan for adjusting the mass flow rate
4.minimised turbulence by drawing in air and optimum arrangement of the measuring objects
5.transparent measuring objects with connectors for pressure measurement provide insight into the internal structure
6.measuring nozzle for determining the mass flow rate
7.pressure losses in subsonic flow in pipe elbows and various pipe sections
8.pressure curve at subsonic and sonic nozzle flow
9.orifice for determining volumetric flow rate by differential pressure measurement
10.record fan characteristic curve using a throttle valve displays for pressures, velocity and speed

Technical data
Radial fan
max. speed: 31000min-1
max. volumetric flow rate: 226m3/h
max. head: 318mbar
max. power consumption: 1,8kW
Measuring objects
pipe section: 1m
Ø 16, 24, 34mm
90° pipe elbow
2 nozzles, inner diameter: 12…34mm
with sudden enlargement
with gradual enlargement (de Laval nozzle)
orifice with orifice disks
Ø 12, 19, 25, 32mm
throttle valve: Ø 34mm

Measuring ranges
speed: 0…99999min-1
1x 0…25mbar
1x 0…600mbar
1x 0…1000mbar
velocity: 0…65m/s
230V, 50Hz, 1 phase
120V, 60Hz, 1 phase, 230V, 60Hz, 1 phase
UL/CSA optional
Dimensions and weight
LxWxH: 1750x600x390mm
Weight: approx. 58kg