Sci-tech Vertical Flow from A Tank Apparatus Model FM 81 determines these losses at different flow rates.
Pressure losses in the flow from tanks are essentially the result of two processes: the jet deflection upon entry into the opening and the wall friction in the opening. As a result of the pressure losses the real discharge is smaller than the theoretical flow rate. Different diameters as well as inlet and outlet contours of the openings can be studied. Additionally, the contraction coefficient can be determined as a characteristic for different contours. The experimental unit includes a transparent tank, a measuring device as well as 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 contours are provided along with the unit. The issued water jet is measured using a measuring device. A pitot tube detects the 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 static pressure. In this way, the level can be precisely adjusted and read on the manometer. The experimental unit is positioned easily and securely on the work surface of the HM 150 base module. The water is supplied and the flow rate measured by HM 150. Alternatively, the experimental unit can be operated by the laboratory supply. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
 study of pressure losses in vertical flows from tanks
 determining the contraction coefficient for different contours and diameters
 tank with adjustable overflow
 5 interchangeable inserts with different contours
 measuring device for determining the jet diameter
 pitot tube for determining the total pressure
 pressure display on twin tube manometers
 flow rate determined by HM 150 base module
 water supply using HM 150 base module or via laboratory supply.
– capacity: approx. 13L
– overflow height: max. 400mm
– max. flow rate: 14L/min
Inside diameters: d1=inlet, d2=outlet
– 1x cylindrical hole, d=12mm
– 1x outlet from the insert: cone d1=24mm, d2=12mm
– 1x inlet to the insert: orifice plate d1=24mm, d2=12mm
– 1x inlet to the insert: cone d1=30mm, d2=12mm
– 1x inlet to the insert: rounded, d=12mm
– pressure: 500mmWC
– jet radius: 0…10mm
– study of the outlet jet (diameter, velocity)
– determination of pressure losses and contraction coefficient for different outlet contours
– determination of flow rate at different discharge heads
– Mains power supply: 220-240V, 1Ph, 50Hz
– Closed water circuit or ‘Sci-tech’ Hydraulic Bench FM 100.