Chapter 14
IMPULSE OF JETS
-Jet Strikes normal to the flat stationary plate
Force exerted by the jet normal to the plate
Fn = ρaV2
a = area of jet
V = velocity of jet
ρ= density of water
-Jet strikes on a inclined stationary plate
Force exerted by the jet normal to the plate
Fn = ρaV2.sinθ
-Force exerted by jet on moving flat plate normal to jet
u = plate velocity, v= jet velocity
Fn = ρa(V – u)2
Work done per second (W) = Fn × u = ρa[V – u]2 × u
-Jet strikes on series of flat plat mounted on the peripehry of wheel
Fn = ρaV(V – u)
Work done by the jet = Fn × U
W = ρaV(V – u)u
Efficiency of the work done of wheel=
At, u = V/2 ; ηmax = 50%
-Jet striking on a symmetrical stationary curved plate
Fn = ρaV2 (1 + cosθ)
Force exerted by a jet in its direction of flow on a curved vane is always greater than that exerted on a flat plate.
-Force Exerted By a jet on a Hinged Plate
-Force due to jet of water, normal to the plate
Pn = ρaV2 sin (90º –θ)
-For equilibrium of plate
sinθ=ρav2/W
W= weight of the plate
2 videos|122 docs|55 tests
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1. What is the impulse of a jet? |
2. How is the impulse of a jet calculated? |
3. What factors affect the impulse of a jet? |
4. What are some practical applications of the impulse of jets? |
5. How does the impulse of jets relate to Newton's third law of motion? |
2 videos|122 docs|55 tests
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