Operating principle of a Francis turbine Model of a reaction turbine with adjustable guide vanes; determination of the efficiency Features - model of a reaction turbine - transparent operating area - turbine with adjustable guide vanes - flow visualisation using CFD technology - multimedia teaching material online in the GUNT Science Media Center: E‑Learning course, prepared CFD simulations, worksheets, videos Learning objectives/experiments - design and function of a Francis turbine - determination of torque, power and efficiency - graphical representation of characteristic curves for torque, power and efficiency GUNT Science Media Center, develop digital skills - E-Learning course with fundamental knowledge and calculations - prepared CFD simulations for flow visualisation - videos with detailed demonstration of the experiments: preparation, execution, evaluation - assured learning success through digital worksheets - retrieve information from digital networks Specification [1] function of a Francis turbine [2] transparent front panel for observing the operating area [3] loading the turbine by use of the band brake [4] adjustable guide vanes for setting different angles of attack [5] marking on brake drum for non-contact speed measurement [6] instruments: spring balances for determining the torque, manometer shows pressure at turbine inlet [7] flow determination by base module HM 150 [8] water supply using the base module HM 150 or via lab supply [9] flow visualisation using prepared CFD simulations [10] digital multimedia teaching material online in the GUNT Science Media Center: E‑Learning course, prepared CFD simulations, worksheets, videos Technical data Turbine - output: 12W at n=1100min-1, approx. 40L/min, H=8m - rotor -- 7 blades -- blade width: 5mm -- external Ø: 50mm - guide vanes -- 6 vanes, adjustable (20 stages) Measuring ranges - force: 2x 0...10N - pressure: 0...1,0bar LxWxH: 400x400x630mm Weight: approx. 17kg