Dynamic Force Exerted By Fluid Jet

—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.

—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.

IMPACT OF FREE JET

• STATIONARY
• —MOVING
• —FLAT
• —CURVED

—IMPACT OF JETS ON MOVING FLAT PLATE

IMPACT OF JETS ON FIXED INCLINED PLATE

IMPACT OF JETS ON MOVING CURVED PLATES

IMPACT OF JET ON MOVING INCLINED PLATE

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..

APPLICATION

Water jet cutting for metal, glass, composites.

Turbo machines like pump, compressor, etc.

Recreational use. Water jet pack, jet skiing.