Definition
High speed flow of a fluid is associated with
low pressure and
low-speed flow is associated with
high pressure
High speed = pressure low
Low speed = pressure high
Application
Aerofoil
+ wing of airplane is the shape of an
aerofoil
+ such shape causes air to flow
more rapidly over its surface than its lower one
+
top surface = low pressure
+
bottom = high pressure
+ the difference in pressure =
upward resultant force
+ lifts the aircraft in flight
+ an aerofoil in an
inverted position =
downward pressure
Carburetors
+ air is passed through a venturi tube to
increase its speed = decrease the pressure
+ low pressure air is routed over a tube leading to a fuel tank
+ low pressure =
suck the fuel into airflow
Bunsen Burner
+ gas comes at
high speed = low pressure
+ atmospheric pressure
push air into the hole
+ air and gas mixture produces blue flame
Insecticide Sprayers
+ when the plunger is
pushed quickly air inside the cylinder is forced out the narrow outlet at
high speed
+ a
low pressure is created at the
nozzle
+ atmospheric pressure
pushes the insecticide out of the metal tube
+ the insecticide is carried by the air jet coming out of the outlet