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 HM 150.12 Vertical Flow from a Tank
 Technical Description

Flow 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 flow losses the flowing volumetric flow rate may be less than what is theoretically possible.
HM 150.12 determines these losses at different flow rates. 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.

Learning Objectives / Experiments

- study of the outlet jet (diameter, velocity)
- determination of flow losses and contraction

coefficient for different outlet contours
- determination of flow rate at different flow heights

 Features

* Determination of the diameter and velocity of the

outlet jet1
* Study of openings with different inlet and outlet

contours1
* Determining the contraction coefficient

 Available accessories
HM 150 -- Base Module for Experiments in Fluid Mechanics
 Alternative products
HM 150.09 -- Horizontal Flow from a Tank
 Overview
Fundamentals of Hydrodynamics
 Specification [1] study of flow losses in vertical flows from tanks[2] determining the contraction coefficient for different contours 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 HM 150 base module[9] water supply using HM 150 base module or via laboratory supply Technical Data Tank - contents: approx. 13Loverflow height: max. 400mm- max. flow rate: 14L/minInserts- 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 Measuring ranges- pressure: 500mmWC- jet radius: 0...10mm Dimensions and Weight LxWxH: 400x400x830mmWeight: approx. 18kg Required for Operation HM 150 (closed water circuit) or alternatively water connection and drain Scope of Delivery 1 experimental unit5 inserts1 set of hoses1 set of instructional material Order Details 070.15012  HM 150.12  Vertical Flow from a Tank