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Do guns use a converging-diverging nozzle to accelerate bullets to supersonic speeds?
No, bullets are accelerated by rapidly expanding gasses. Those gasses are in a cylinder only open at one end. The bullet acts as a piston, and is pushed out of the open end of the cylinder. Not all bullets are supersonic, but those that are become supersonic from the amount of acceleration, and the time it is applied.
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How is supersonic flow produced in a de laval nozzle?
Supersonic flow is produced in a de laval nozzle by constricting the flow in the center in order to increase the velocity. The shape will be hour-glass in nature. The initial mass flow rate and inlet pressure must be sufficient to produce a supersonic choked flow and the discharge pressure must be sufficiently low enough for supersonic flow to occur.
What are the advantages and disadvantages of flow nozzle?
One disadvantage in the convergent-divergent nozzle as a shock wave can take place in the nozzle A nozzle is a device that converts pressure energy to kinetic energy (increasing fluid velocity on the account of static pressure) For a convergent nozzle there is no disadvantages as it can raise the fluid velocity only for the sonic speed the convergent-divergent type raises the velocity to over than sonic speed making supersonic flow, this could make a shock wave in the nozzle that turns the supersonic flow to subsonic flow
What is a hartman generator?
A Hartmann generator is an electronic device that produces shock waves. It does this on the edge of a nozzle using a supersonic gas resonate.
What is the difference between divergent nozzle and diffuser?
too bad i dont know what either of those are
On the F108 engine the purpose of the HPT nozzle assembly is to accelerate the energy from the combustion gases to drive the?
High Pressure Turbine
The test section RHOMBUS of a supersonic wind tunnel makes flow uniform in test section?
Using shock-expansion cancellation technique flow in the diverging part of a supersonic nozzle is brought back to free stream direction ( direction parallel to the axis of nozzle) where a rhombus shaped region(Test Section) is formed in which uniform flow is ensured. Refer Method Of Characteristics from Rathakrishnan For Diagram.
What has the author Laurence D Leavitt written?
Laurence D. Leavitt has written: 'Effects of spanwise nozzle geometry and location on the longitudinal aerodynamic characteristics of a vectored-engine-over-wing configuration at subsonic speeds' -- subject(s): Aerodynamics, Supersonic, Supersonic Aerodynamics, Supersonic nozzles 'Effects of twin-vertical-tail parameters on twin-engine afterbody/nozzle aerodynamic characteristics' -- subject(s): Fighter planes, Jet nozzles, Tail surfaces, Flight testing 'Static internal performance characteristics of two thrust-reverser concepts for axisymmetric nozzles' -- subject(s): Jet planes, Thrust reversers, Mathematical models, Testing 'Longitudinal aerodynamic characteristics of a vectored-engine-over-wing configuration at subsonic speeds' -- subject(s): Aerodynamics, Supersonic, Supersonic Aerodynamics, Supersonic nozzles 'Effect on empennage location on twin-engine afterbody/nozzle aerodynamic characteristics at Mach numbers from 0.6 to 1.2' -- subject(s): Flight testing, Air-engines, Fighter planes
Why does a gas flowing supersonically in Laval nozzle continue to accelerate even though the flow area is increasing in the divergent section of the nozzle?
In the converging section of the nozzle,relatively high pressure expanding has a small increase in specific volume. At lower pressures the increase in specific volume is large.
What has the author Allen E Puckett written?
Allen E. Puckett has written: 'Guided missile engineering' -- subject(s): Guided missiles 'Supersonic nozzle design for engineers'
Why convergent-divergent used in steam nozzles?
Convergent-divergent nozzles are used in steam applications to efficiently accelerate steam to supersonic speeds. The convergent section of the nozzle compresses the flow, increasing its velocity as it approaches the speed of sound, while the divergent section allows the steam to expand further, achieving supersonic flow. This design maximizes the energy conversion from thermal to kinetic energy, enhancing the overall efficiency of steam turbines and other systems. Additionally, it helps control the pressure and flow characteristics of the steam, optimizing performance in various operating conditions.
Why to use a converging and diverging nozzle in a steamturbine?
I tried to answer this question 4 times but WikiAnswers won't accept the code word to submit it, even though it is correct all 4 times. Converging / diverging nozzles are used with compressible fluids (gases, including steam) to increase their velocity. The converging section (cross-sectional area decreasing in the direction of flow) increases the velocity until it reaches the velocity of sound in the gas (sonic velocity - "Mach 1"). At that point, further reduction in area would slow the gas down, but increasing the cross-sectional area in the direction of further flow allows the gas to expand and increase its velocity to supersonic. If you only had a converging nozzle the maximum speed of the gas could only be subsonic or sonic. The diverging portion of the nozzle needs to be added to achieve supersonic speeds. The converging-diverging nozzle (also known as DeLaval nozzle) is used in steam turbines, most if not all rocket engines and all supersonic wind tunnels. +++ Actually, gas flowing though a diverging nozzle LOSES velocity but gains pressure, and it is pressure in the impinging stream the turbine needs, not its velocity.
In divergent nozzle pressure will increase or decrease?
In a divergent nozzle, pressure will decrease as the flow area increases. This is due to the conservation of mass principle, where an increase in area causes a decrease in velocity and thus a decrease in pressure according to Bernoulli's equation.
