Water hammer and surge chamber Investigation of formation, effect and function Features - visualisation of water hammer - operation of a surge chamber - determining the wave propagation velocity in water - GUNT software for displaying the water hammer and oscillations Learning objectives/experiments Transient flow conditions in pipe systems by means of experimentation - demonstrating water hammer in pipes - determining the wave propagation velocity in water - understanding how a surge chamber works - natural frequency in the surge chamber Specification [1] functioning of a surge chamber [2] pipe section with ball valve and surge chamber [3] surge chamber designed as transparent PMMA tank [4] pressure sensor behind the water chamber for measuring the pressure wave [5] pipe section with solenoid valve and two pressure sensors for measuring water hammer [6] volumetric flow measurement via measuring tank of the supply unit [7] representation of the pressure curves with GUNT software [8] GUNT software for data acquisition via USB under Windows 10 Technical data Pipe section for pressure oscillations - copper - length: 5875mm, Ø, inner: 26mm - ball valve - surge chamber, PMMA -- height: 825mm -- Ø, inner: 50mm Pipe section for water hammer - copper - length: 5875mm, Ø, inner: 26mm - distance between sensors: 3000mm - solenoid valve, constant closing time: 20...30ms Tank: 50L Supply unit - pump -- power consumption: 250W -- max. flow rate: 150L/min -- max. head: 7,6m - storage tank: 180L, - measuring tank: 60L Measuring ranges - pressure: 2x 0...10bar (pipe section) - pressure: 0...0,3bar (surge chamber) 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 6800x820x2000mm (total) Weight: approx. 155kg