Why does the nozzle reduce pressure and increase velocity of fluid?

Question

I read in a book that the nozzle reduces pressure of fluid and increases the velocity of that fluid. My questions are, "How nozzle reduces pressure?" and "Why reduces pressure?"

Answer 1

Bernoulli's equation.
P1-P2=1/2d(V2^2-V1^2)
A1V1=A2V2 continuity equation

Therfore
A2V1
V2>V1 gives P2 A=area, P=pressure.V=velocity, d=density of fluid, !=upstream, 2=nozzle throat area.

Answer 2

A nozzle increases the pressure and increases the velocity.
When you open the nozzle you decrease the pressure and in crease the volume.
The fluid flows through a larger or smaller hole.

Answer 3

thought OF gas TURBINE ENGINES If the balloon have been converted right into a length of pipe, and on the forward end an air compressor designed with blades fairly like a fan have been put in, this might furnish a means to fill up the air furnish interior the balloon. A source of means is now required to coach the compressor. to enhance the quantity of air, gas and ignition are presented and combustion occurs. This very much expands the quantity of gas available. interior the path of the now on the instant increasing gases, yet another fan or turbine could be located. via fact the gases pass contained in direction of the blades of the turbine, they reason it to rotate at severe speed. with the aid of connecting the turbine to the compressor, we've a mechanical means to rotate the compressor to fill up the air furnish. The gases nevertheless possessing potential are discharged to the ambience with the aid of a nozzle that quickens the gas flow. The reaction is thrust or flow of the tube removed from the escaping gas flow. we've a normal turbojet engine. The turbojet engine is a severe-speed, severe-altitude powerplant. the army, at present day, has no requirement for this style of engine. via fact that is ordinary and ordinary to function and safeguard, even nonetheless, the army does use the gas turbine engine. the uncomplicated turbojet engine has in particular one rotating unit, the compressor/turbine assembly. The turbine extracts from the gas flow the potential had to rotate the compressor. This furnishes the pressurized air to maintain the engine cycle. Burning the gas-air combination supplies the flow of warm increasing gas from which approximately 60 p.c. of the potential is extracted to maintain the engine cycle. Of the full potential progression, approximately 40 p.c. is available to enhance useful thrust promptly.

Answer 4

Bernoulli's principle