Operating Principle of a Pelton Turbine HM 150.19
Operating Principle of a Pelton Turbine
|Name:||Operating Principle of a Pelton Turbine|
Water turbines are turbomachines utilising water power. The Pelton turbine is a type of impulse turbine; such turbines convert the pressure energy of water into kinetic energy entirely in the distributor. During the conversion, the water jet is accelerated in a nozzle and directed onto the blades of the Pelton wheel tangentially. The water jet is redirected by approximately 180° in the blades. The impulse of the water jet is transmitted to the Pelton wheel.
HM 150.19 is a model of a Pelton turbine demonstrating the function of an impulse turbine.
The experimental unit consists of the Pelton wheel, a needle nozzle used as distributor, a band brake for loading the turbine and a housing with a transparent front panel. The transparent cover enables to observe the water flow, the Pelton wheel and the nozzle during operation. The nozzle cross-section and thus the flow rate are modified by adjusting the nozzle needle.
The turbine torque is determined by force measurement on a band brake and is read on spring balances. For measuring the rotational speed, a non-contact speed sensor, e.g. HM 082, is required. A manometer shows the water pressure at the turbine inlet.
The experimental unit is positioned easily and securely on the work surface of the HM 150 base module. The water is supplied and the flow rate measured by HM 150. Alternatively, the experimental unit can be operated by the laboratory supply.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
- design and function of a Pelton turbine
- determination of torque, power and efficiency
- graphical representation of characteristic curves for
torque, power and efficiency
* Model of an impulse turbine1
* Transparent operating area1
* Adjustable nozzle cross-section1
* Loading by band brake
HM 150 -- Base Module for Experiments in Fluid Mechanics
HM 365.31 -- Pelton and Francis Turbine
HM 450.01 -- Pelton Turbine
 function of a Pelton turbine
 transparent front panel for observing the operating area
 loading the turbine by use of the band brake
 adjustable nozzle needle for setting different nozzle cross-sections
 marking on brake drum for non-contact speed measurement
 instruments: spring balances for determining the torque, manometer shows pressure at turbine inlet
 flow rate determination by base module HM 150
 water supply using base module HM 150 or via laboratory supply
- output: 5W at 500min-1, approx. 30L/min, H=2m
- Pelton wheel
blade width: 33,5mm
external diameter: 132mm
- jet diameter: 10mm
- braking force (spring balance): 10N
- pressure: 0...1bar
Dimensions and Weight LxWxH: 400x400x620mm
Weight: approx. 15kg Required for Operation HM 150 (closed water circuit) or water supply, drain Scope of Delivery 1 experimental unit
1 set of instructional material
070.15019 HM 150.19 Operating Principle of
a Pelton Turbine