Experiments with a Pelton Turbine HM 289
Experiments with a Pelton Turbine
|Name:||Experiments with a Pelton Turbine|
Pelton turbines are types of impulse turbine. They are driven by free jet nozzles. In the nozzles, the water is strongly accelerated. Ambient pressure exists at the nozzle outlet.
The experimental unit is placed upon the base unit HM 290. The two units together provide the basic experiments to get to know the operating behaviour and the most important characteristic variables of Pelton turbines.
The water jet is accelerated in a nozzle and hits the Pelton wheel tangentially. In the blades on the circumference of the Pelton wheel the water jet is deflected by approximately 180°. The impulse of the water jet is transmitted to the Pelton wheel.
HM 289 consists of a Pelton wheel and a needle nozzle, mounted in a transparent housing. The needle nozzle can be adjusted during operation. The loading device is outside of the housing. The eddy current brake generates a defined load. The eddy current brake is specially developed by GUNT. It is wear-free and can be finely adusted.
The torque delivered by the turbine is determined via an electronic force sensor. The speed is measured with an optical speed sensor. The measuring values are transferred to the base unit HM 290.
The water supply and the flow rate measurement are realised with the base unit HM 290. A pressure control included in HM 290 enables the
recording of characteristics at a constant head.
All the advantages of software-supported experiments and evaluation are offered by the GUNT software in HM 290.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
- principle of operation of a Pelton turbine
- characteristic at constant head
* relationship between torque and speed
* efficiency dependent on speed
* flow rate dependent on speed
* hydraulic power and mechanical power dependent
- evaluation of measuring values and characteristics
based on the theory
- partial load behaviour with needle control in
comparison to throttle control
* Illustrative model of a Pelton turbine1
* Adjustable, wear-free eddy current brake as turbine
* GUNT software for data acquisition, visualisation
* Part of the GUNT-Labline fluid energy machines
HM 287 -- Experiments with an Axial Turbine
HM 288 -- Experiments with a Reaction Turbine
HM 291 -- Experiments with an Action Turbine
HM 365.31 -- Pelton and Francis Turbine
HM 450.01 -- Pelton Turbine
 turbine to place upon the base unit HM 290
 functioning and operating behaviour of a Pelton turbine
 transparent housing for observing the Pelton wheel and needle nozzle
 different nozzle cross-sections via adjustable nozzle needle
 constant pressure of the turbine represents in practice the head and is adjusted via HM 290
 turbine load using the wear-free and adjustable eddy current brake
 force sensor to determine the torque on turbine shaft
 optical speed sensor for measuring the turbine speed
 water supply, flow rate measurement and unit-specific software data acquisition and operation via HM 290
- power output: approx. 70W at 2700min-1
- wheel diameter: 70mm
- torque: 0..0,5Nm
- speed: 0...9000min-1
Weight: approx. 5kg Scope of Delivery 1 experimental unit
1 set of instructional material Order Details
070.28900 HM 289 Experiments with a Pelton