Function of a turbomachine; configuration as pump or turbine with interchangeable rotor/impeller and stator/guide vane system Features - investigation of a single-stage axial turbomachine - can be operated as pump or turbine by changing rotor, impeller and stator, guide vane system - probe to determine flow conditions at inlet and outlet of rotor, impeller and stator, guide vane system - transparent working area Learning objectives/experiments - recording characteristic curves - determining dimensionless characteristics - velocity triangles and pressure curves - investigation of energy conversion within the turbomachine - how blade, vane shape affects power and efficiency - determining the outlet angular momentum and its effect on the power - cavitation effects Specification [1] investigation of an axial flow turbomachine [2] closed water circuit with expansion tank and centrifugal pump [3] turbomachine may be operated as a turbine and as a pump [4] two sets of impellers and guide vane systems for pump mode and two sets of rotors and stators for turbine mode with different inlet and outlet angles [5] asynchronous motor with 4-quadrant operation via frequency converter [6] recovery of the brake energy [7] motor with pendulum bearing, torque measurement via lever arm and force sensor [8] inductive speed sensor on the motor [9] manometers for measuring the inlet and outlet pressures [10] measuring probe and differential pressure sensor for recording the pressure curve in the turbomachine [11] electromagnetic flow meter [12] display of power consumption, torque, speed, pressure, differential pressure and flow rate Technical data Centrifugal pump - power: 5,5kW - max. flow rate: 150m3/h - max. head: 10m Asynchronous motor - power: 1,5kW - torque: 0...5Nm - speed: 0...3000min-1 Expansion tank: 150L Measuring ranges - pressure (manometer): 2x -1...5bar - differential pressure: 5x 0...500mbar - flow rate: 0...100m3/h - speed: 0...3000min-1 - torque: 0...9,81Nm 400V, 50Hz, 3 phases LxWxH: 3300x750x2300mm Weight: approx. 620kg
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