MR-HM 150.12 Vertical Flow From A Tank Measurement Didactic Equipment Fluid Mechanics Experiment Equipment Description • determination of the diameterand velocity of the outlet jet • study of openings with differentinlet and outlet contours • determining the contraction coefficient Pressure losses in the flow from tanksare essentially the result of two processes: the jet deflection upon entry intothe opening and the wall friction in theopening. As a result of the pressurelosses the real discharge is smaller thanthe theoretical flow rate. MR-HM 150.12 determines these losses atdifferent flow rates. Different diametersas well as inlet and outlet contours ofthe openings can be studied. Additionally, the contraction coefficient can bedetermined as a characteristic for different contours. The experimental unit includes a transparent tank, a measuring device as wellas a Pitot tube and twin tube manometers. An interchangeable insert is installed in the tank’s water outlet to facilitate the investigation of various openings. Five inserts with different diameters, inlet contours and outlet contoursare provided along with the unit. The issued water jet is measured usinga measuring device. A Pitot tube detectsthe total pressure of the flow. The pressure difference (read on the manometer) is used to determine the velocity. The tank is fitted with an adjustable overflow and a measuring point for staticpressure. In this way, the level can beprecisely adjusted and read on themanometer. The experimental unit is positioned easily and securely on the worksurface of the MR-HM 150 base module. The water is supplied and the flow ratemeasured by MR-HM 150. Alternatively, theexperimental unit can be operated bythe laboratory supply. Learning objectives/experiments • study of the outlet jet (diameter, velocity) • determination of pressure losses andcontraction coefficient for different outlet contours • determination of flow rate at differentdischarge heads Specification [1] study of pressure losses in vertical flows fromtanks [2] determining the contraction coefficient for differentcontours and diameters [3] tank with adjustable overflow [4] 5 interchangeable inserts with different contours [5] measuring device for determining the jet diameter [6] Pitot tube for determining the total pressure [7] pressure display on twin tube manometers [8] flow rate determined by MR-HM 150 base module [9] water supply using MR-HM 150 base module or vialaboratory supply Technical data Tank • capacity: approx. 13L • overflow height: max. 400mm • max. flow rate: 14L/min Inserts Inside diameters: d1=inlet, d2=outlet • 1x cylindrical hole, d=12mm • 1x outlet from the insert: coned1=24mm, d2=12mm • 1x inlet to the insert: orifice plated1=24mm, d2=12mm • 1x inlet to the insert: coned1=30mm, d2=12mm • 1x inlet to the insert: rounded, d=12mm Measuring ranges • pressure: 500mmWS • jet radius: 0…10mm LxWxH: 400x400x830mm Weight: approx. 18kg Required for operation MR-HM 150 (closed water circuit) or water connection, drain Scope of delivery 1 experimental unit 5 inserts 1 set of hoses 1 set of instructional material
