Axial-flow turbomachines: 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:

• investigation of an axial flow turbomachine

• closed water circuit with expansion tank and centrifugal pump

• turbomachine may be operated as a turbine and as a pump

• 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

• asynchronous motor with 4-quadrant operation via frequency converter

• recovery of the brake energy

• motor with pendulum bearing, torque measurement via lever arm and force sensor

• inductive speed sensor on the motor

• manometers for measuring the inlet and outlet pressures

• measuring probe and differential pressure sensor for recording the pressure curve in the turbomachine

• electromagnetic flow meter

• 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: 5x0...500mbar, flow rate: 0...100m3/h, speed: 0...3000min-1, torque: 0...9,81Nm, 400V, 50Hz, 3 phases