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CVEN-3313 Theoretical Fluid Mechanics
MODULE#4 : Application of Impact on a Jet

1. OBJECTIVE
To use the momentum equation to estimate the force exerted by a jet on a stationary target.

2. THEORY
The momentum equation in the vertical (z) direction can be written as:

Applying the momentum equation for a control volume including the forces acting on a flat target or hemispherical target gives: (1a : flat)
(1b : hemi)

It is assumed that the velocity going out of the control volume is equal to the velocity coming in. Additionally, the elevation difference within the control is assumed to be negligible. The vertical force caused by the jet is balanced by the mass placed on the weight pan.

(2)

The initial velocity of the jet, v0, is :
(3)

From Bernoulli’s equation, the jet velocity, v, in the control volume at the target is :

(4)

Combining equations (1) through (4), the following equations can be obtained for the flat and hemispherical targets, respectively.

(5a : flat) (5b : hemi)

3. PROCEDURE
1) Install the flat target in the jet apparatus.
2) Level the apparatus and adjust the pointer for zero deflection. 3) Place a 50g mass on the weight pan.
4) Increase the flow rate until the weight induced by the 50g is balanced by the force of the jet. 5) Measure the actual flow rate, Qactual, by recording the time required to collect 10L. Use the volume gauge on the bench. 6) Repeat steps 3-5 for 100, 200, 300, 400 and 500g mass increments. 7) Repeat the procedure for the hemispherical target.

4. RESULTS & ANALYSIS
1) Equations (5a) and (5b) are non-linear with respect to flow rate Qtheor. These can be solved...

...
IMPACT OF a jet
ABSTRACT
The objective of this experiment is to determine the force exerted by a jet of water on vanes of various shape.Three different shape of vanes;flat plate,conical cup,and hemispherical cup are used for this experiment.The results obtain from the experiment are then used to compare with the theoretical results.Force generated on the surface of vane depends on the rate of change of momentum and it can be calculated...

...force generated by impact of the jet on vanes of various shapes like flat plate, conical cup and hemispherical cup. Besides that, the results from the experiment have to be compared with the theoretical calculations too.
1.0 Introduction
Water turbines are widely used throughout the world to generate power. By allowing fluid under pressure to strike the vanes of a turbine wheel, mechanical work can be produced. Rotational motion is then produced by the...

...Impact of A Jet
Philip Mah Koon Yue
Mohananda a/l Anantha Krishnan
Ahmad Saeed Abood
Eleanor Hang Lee Shean
Chan Jun Hoe
School of Engineering
Taylor’s University
Malaysia
23 March 2011
Table of Content
Abstract
3
1. Introduction
3
2. Experiment Design
3
2.1 Materials
3
2.2 Methods & Procedures
4
3. Results and discussion
5
4. Conclusion and Recommendations
8
References
8
Appendix
9
Abstract
The...

...
1.0 ABSTRACT
The objective for this experiment is to verify the momentum equation experimentally through the impact of jet against deflectors. There are four deflectors used in this experiment. The four deflectors are plate, hemisphere, slope and cone. The loading weights to be used are 0.8 N, 1.0 N, 1.5 N and 2.0 N. In this experiment, the time taken for the water level in the volumetric tank to raise from 10 to 20 L is determined by using a stop watch. The...

...Exp. (6): Flow Over Weirs
Purpose:
* To demonstrate the characteristics of flow over weirs.
* To determine the 'Coefficient of Discharge' for each type of weir.
Introduction:
In open channel hydraulics, weirs are commonly used to either regulate or to measure the volumetric flow rate. They are of particular use in large scale situations such as irrigation schemes, canals and rivers. For small scale applications, weirs are often referred to as notches and invariably are sharp...

...Fluid Mechanics | Lab Report | 2012
Experiment 2 Impact of Jet
CVE3208 Fluid Mechanics
Ahmed Sujeeth I11009050 BCEGI - Semester 4
Lecturer: Dr. Khin Maung Win
19th November 2012
Page 1 of 9
Ahmed Sujeeth | I11009050 | BCEGI
CVE3208 | Fluid Mechanics | Lab Report | 2012 Title : Impact of Jet To investigate the validity of theoretical expressions for the force exerted by a jet on targets of various...

...1.0 ABSTRACT
The purpose of the impact of jet experiment is to design a system to determine the force generated by the impact of jet on a variety of target vanes. A formula is given to calculate the reaction force at the different vanes caused by the jet. At the end of the experiment, the data collected and results calculated will then be compared to theoretical values which are given. Students are expected to be able to...

...Experiments and Statistics
The Short Laboratory Report
Momentum principle and jetimpacts
Introduction
Water turbines are widely used throughout the world to generate power, they were developed in the 19th century and were widely used for industrial power prior to electrical grids. This is applying the principle of conservation of linear momentum theorem. When a jet of fluid strike a flat or curved surface...

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