1. Lab Momentum Flux
Determine forces on a surface due to a jet impinging on it
Over what ranges of forces can good agreement (consistently less than % ) be expected with each deflector
Over what range of forces consistently produced differences of more than % with a particular deflector
Did you observe anything that can explain these large differences
Suggestions for improvement

2. F = Reactive vertical force on the target = mg
To investigate the interaction between reactive forces and directional changes in momentum flux we use the momentum apparatus:
F = mg
F = mg a a
……………..(1) V2
Where, V V 2 2
F = Reactive vertical force on the target = mg
Q = discharge from the jet = V/t
A = area of the jet =
D= diameter of jet= 8 mm
= angle of the exiting jet= 30,90 and 120 degree V1
These equation is derived from Newton’s 2nd law of motion, Bernoulli, and the continuity equation

3. Assumptions
Constant external pressure on the fluid jet so that the pressure in
the fluid remains constant as it moves over a deflector
Frictional resistance due to fluid-deflector interaction is negligible
Negligible lateral spreading of plane jet
Negligible weight of control volume

4. Analysis Calculate the flow rates Calculate Km and Kt
Compare Km and Kt
Find error between Km and Kt
Plot Km and Kt with alpha
Km= Measured , Kt= Theoretical

5. Table Convert degree to radian to calculate Kt Target Mass(g) Force(N)
Volume (L)
Time(S) Q
K m Kt
Error( %)= ( Km-Kt/Kt) 30 90
120
Convert degree to radian to calculate Kt

6. Plot

7. Memo Individual Submission One page long
Look at CE321 webpage for sample memo
Attach Results, datasheet and sample calculation
Remember your Audience !!! Highly Technical so come straight to
the point
Make sure you address all the questions