Experiments with a Pelton turbine Record characteristics of a free jet turbine Features - illustrative model of a Pelton turbine - adjustable, wear-free eddy current brake as turbine load - GUNT software for data acquisition, visualisation and operation - part of the GUNT Labline fluid energy machines Learning objectives/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 on speed - evaluation of measuring values and characteristics based on the theory - partial load behaviour with needle control in comparison to throttle control Specification [1] turbine to place upon the base unit HM 290 [2] functioning and operating behaviour of a Pelton turbine [3] transparent housing for observing the Pelton wheel and needle nozzle [4] different nozzle cross-sections via adjustable nozzle needle [5] constant pressure of the turbine represents in practice the head and is adjusted via HM 290 [6] turbine load using the wear-free and adjustable eddy current brake [7] force sensor to determine the torque on turbine shaft [8] optical speed sensor for measuring the turbine speed [9] water supply, flow rate measurement and unit-specific software data acquisition and operation via HM 290 Technical data Pelton turbine - power output: approx. 70W at 2700min-1 - wheel diameter: 70mm Measuring ranges - torque: 0...0,5Nm - speed: 0...9000min-1 LxWxH: 350x250x300mm Weight: approx. 5kg