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1. Dynamic Force Exerted By
Fluid Jet
PREPARED BY: BIBEK ADHIKARI
ROLL : 407

2.  Dynamic force: The force exerted by virtue of fluid
motion is called a "Dynamic force".
 Fluid Jet: Is a stream of fluid issuing from a
nozzle with a high velocity and hence a high
kinetic energy.

3.  Force exerted can be evaluated using Impulse-
Momentum principle.
 Dynamic force applied = Rate of change of
momentum.
 F= m. dv/dt.
 Or F= m/t (v2-v1)
 Or F=Qρ (v2-v1)
 Where Q is the rate of flow and the density ρ.

4. IMPACT OF FREE JETS
 STATIONARY
 MOVING
 FLAT
 CURVED

6.  Turbo machines: Where mechanical work is done
by the fluid by dynamic action between fluid and
rotating system of blades
 Examples water, steam, gas turbines,
 Pump, fans, blowers, etc..

7. APPLICATION
Water jet cutting for metal, glass, composites.
Turbo machines like pump, compressor, etc.
Recreational use. Water jet pack, jet skiing.