1) The document discusses the impact of a liquid jet on both a fixed and moving curved plate. When the jet strikes at the center of a fixed symmetrical plate, the force exerted is in the direction of the jet and perpendicular to the plate. 2) When the jet strikes tangentially at the end of a fixed symmetrical plate, the force is exerted perpendicular and parallel to the plate. 3) When the jet strikes a moving curved plate traveling in the direction of the jet, the relative velocity between the jet and plate must be considered. The work done by the jet on the plate per second can be calculated using the relative velocity and angle of impact.

1. Gandhinagar Institute of Technology
Subject :- Fluid Power Engineering
MECHANICAL ENGINEERING
5th - C-2
Impact of jet on curved plate
Prepared By –
Rathod Mehul [150120119159]
Guided By :
Prof. Sajan Chaurasiya

2. Impact of liquid jet on a fixed curved plate
1) When the jet strikes at the centre of the
symmetrical blade

3.  The plate is smooth and there is no loss of energy due to impact of jet.
 Force exerted by jet in the direction of jet,
 Force exerted by jet on curved fixed plate in vertical direction,
]cos1[
)]cos([)(
][V)water/secofmass(
2
21x





AVF
VVAVF
VF
x
x
xx



sin
]sin0[)(
][)(
2
21
AVF
VAVF
VVAVF
y
y
yyy




4. 2) When jet strikes tangentially at one end of
symmetrical plate

5. 


2180diflectionofAngle
0
]sinsin[)(
)(AV)( 21




y
y
yyy
F
VVAVF
VVF



cos2
)]cos(cos[)(
)(AV)(
2
21
AVF
VVAVF
VVF
x
x
xxx



 Consider a water jet striking on symmetrical curved
plate tangentially at one end as shown in figure.

6. Impact of liquid jet on a moving curved plate
1) When jet strikes at the centre and plate moving in the direction of jet.

7.  The relative velocity between jet and plate = V – u.
 Force exerted by water jet on moving curved plate
 Work done by the jet on the plate/second]cos1[)(
)]cos1)()[((
)]cos)(()[(Vplate)thestrikesjetith whichvelocity w(
2






uVAF
uVuVAF
uVuA
x
x
]cos1[)Au(V.
secondmoveddistance
2
 

uDW
Fx

8. The effect of angle of plat on force
 Water leaves the nozzle at a velocity with force until it hits the plate, for a flat plate the
force generated is minimum return but maximum force moving that plate where it has
minimal deflection. As the plate curvature increases the resultant deflection is
smoother and less ‘beating’ of the plate, hence the force returning increases. The
angle increase will improve force.
 Newton’s 3rd law explains for every action there is a equal and opposite reaction and
this is proved by the results table where the increase in force arrow increase’s with the
plate’s angle. Please refer to diagram below to aid my best attempt of an explanation:

9. It is clear the hemisphere is more suitable, followed by the curved plated
followed by the flat plate. By the statements above the oblique plate would
have been more efficient than the flat plate and less efficient than the curved
with it’s deflection angle at 60 degrees.

10. THANK YOU….