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Products  |  Fluid Mechanics  |  Fundamentals of Fluid Mechanics  |  HM 150.08
HM 150.08 Measurement of Jet Forces Show data sheet (pdf file) Print page
Technical Description

  During deceleration, acceleration and deflection of a flowing fluid, there is a change of velocity that leads to a change in momentum. According to the momentum equation these changes result in forces. In practice, the motive forces are used to convert kinetic energy into work done, for example in a Pelton turbine.
  In HM 150.08 jet forces are generated and studied with the aid of a water jet that acts on an interchangeable deflector.
  The experimental unit includes a transparent tank, a nozzle, four interchangeable deflectors with different deflection angles and a weight-loaded scale.
  A water jet exits a nozzle vertically upwards, hits the deflector and is deflected. The force of the water jet is adjusted via the flow rate.
  Experiments study the influence of flow velocity and amount of flow rate as well as of different deflection angles. The jet forces generated by the water jet are measured on the weight-loaded scale. The forces are calculated using the momentum equation and compared with the measurements.
  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

- demonstration of the principle of linear momentum
- study of the jet forces
- influence of flow throughput and flow velocity
- influence of different deflection angles



* Investigation of jet forces on deflectors1
* Demonstration of the principle of linear momentum1
* 4 interchangeable deflectors with different deflection


Available accessories
HM 150 -- Base Module for Experiments in Fluid Mechanics
Fundamentals of Hydrodynamics

[1] investigation of jet forces and demonstration of the principle of linear momentum
[2] tank made of transparent material for observing the experiments
[3] nozzle for generating the water jet
[4] jet force can be adjusted via flow rate
[5] four different shaped deflectors: flat surface, oblique surface, semi-circular surface, conical surface

[6] measurement of the jet forces via the weight-loaded scale
[7] flow rate determined by HM 150 base module
[8] water supply using HM 150 base module or via laboratory supply


Technical Data

- inner diameter: 200mm
- height: 340mm
- diameter: 10mm
- flat surface: 90
- oblique surface: 45/135
- semi-circular surface: 180
- conical surface: 135

- 4x 0,2N
- 3x 0,3N
- 2x 1N
- 2x 2N
- 2x 5N


Dimensions and Weight
LxWxH: 400x400x880mm
Weight: approx. 23kg
Required for Operation

HM 150 (closed water circuit) or alternatively water connection and drain

Scope of Delivery
1 experimental unit
1 set of weights
4 deflectors
1 set of instructional material
Order Details
070.15008  HM 150.08  Measurement of Jet Forces
© 2005 G.U.N.T. Gerätebau GmbH