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Products  |  Fluid Mechanics  |  Hydraulic Fluid Energy Machines  |  HM 292
HM 292 Experiments with a Radial Compressor Show data sheet (pdf file) Print page
Technical Description

  Radial compressors are used to compress gases. The medium is sucked in axially to the drive shaft by the rotation of the impeller and flows through the impeller rotating at high speed. By means of centrifugal force, the medium is accelerated towards the outer edge and is compressed in this manner.

  The experimental unit provides the basic experiments to get to know the operating behaviour and the important characteristic variables of radial compressors.

  HM 292 features a two-stage radial compressor with variable speed via frequency converter, an intake pipe and a delivery pipe. The intake and delivery pipes are transparent. A protective plate placed in front of the inlet of the intake pipe prevents larger objects from being sucked in or the clogging of the intake opening. 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, temperature and speed. 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 GUNT 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

  a radial compressor 

- recording of the compressor curve for both stages

- effect of the impeller speed on the pressure

- effect of the impeller speed on the flow rate

- distribution of stage pressure ratios

- effect of compression on the temperature increase

- determination of hydraulical power output and



* Illustrative model of a radial compressor1
* Transparent delivery pipe and intake pipe1
* GUNT software for data acquisition, visualisation

  and operation1

* Part of the GUNT Labline fluid energy machines

Alternative products
HM 230 -- Flow of Compressible Fluids
HM 280 -- Experiments with a Radial Fan
HM 282 -- Experiments with an Axial Fan

[1] functioning and operating behaviour of a radial compressor
[2] two-stage radial compressor with drive motor

[3] variable speed via frequency converter

[4] transparent intake and delivery pipes
[5] throttle valve for adjusting the air flow in the delivery pipe

[6] protecting plate at air inlet for undisturbed air flow

[7] determination of flow rate via intake nozzle

[8] display of differential pressures, flow rate, speed, electrical power consumption and hydraulical power output, temperatures and efficiency
[9] microprocessor-based measuring technique

[10] unit-specific GUNT software for data acquisition and operation via USB under Windows XP,  Windows Vista or Windows 7 

Technical Data

Intake pipe
- inner diameter: D=44mm
- length: L=84mm
Delivery pipe
- inner diameter: D=34mm
- length: L=200mm
Two-stage radial compressor
- power consumption: 1.000W
- speed: 1.000...16.000min-1

- max. flow rate: 180m/h

- max. head: 235mbar


Displayed / measuring ranges

- differential pressure (stage 1 / stage 2): 0...350mbar

- flow rate: 0...120m/h

- temperature: 2x 0...100C

- speed (compressor): 0...21.000min-1

- electrical power consumption: 0...1.000W


Dimensions and Weight
LxWxH: 670x340x530mm
Weight: approx. 20kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery
1 experimental unit
1 GUNT software CD + USB cable
1 set of instructional material
Order Details

070.29200  HM 292  Experiments with a Radial


© 2005 G.U.N.T. Gerätebau GmbH