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To increase the exhaust velocity.
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Pressure, not velocity. A gas flowing through a divergent nozzle gains pressure at the cost of speed.
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What is the difference between convergent divergent nozzle and venturi tube?
In case of venturi meter, at the diverging section mach number is less than 1. however in diverging section of a nozzle mach number is greater than 1.
How do you calculate the exit pressure of a nozzle?
How to calculate the ratio of the inlet-to-exit area of the nozzle
What is the Mach number at the throat section of a converging diverging nozzle?
The Mach number at the throat section of a converging-diverging nozzle is 1. This is where the flow reaches its sonic condition, known as choked flow.
Why mach number 1 at throat section of converging diverging nozzle?
At Mach number 1 at the throat section of a converging-diverging nozzle, the flow is said to be choked. This occurs when the flow velocity reaches the local speed of sound, leading to a critical point where the mass flow rate cannot increase any further. The design of the nozzle is crucial to achieving this critical condition for optimal performance in applications such as rocket engines and supersonic aircraft.
How will heat transfer affect the fluid velocity at the nozzle exit?
Heat transfer can affect the fluid density at the nozzle exit, which in turn can impact the fluid velocity. An increase in heat transfer can lower the fluid density, resulting in an increase in velocity at the nozzle exit due to conservation of mass. Conversely, a decrease in heat transfer can raise the fluid density, leading to a decrease in velocity.
Why to use a converging and diverging nozzle in a steamturbine?
Converging nozzles are used to accelerate steam flow by converting pressure energy into kinetic energy, while diverging nozzles help to convert this kinetic energy back into pressure energy, resulting in increased efficiency and power output for the steam turbine. This design allows for optimal steam expansion and energy conversion in the turbine.
Why Fluid Speed Increases in the Divergent Portion of a Convergent-Divergent nozzle?
Because the fluid is allowed to expand in the nozzle it increases velocity to fill in the voids created by the shape of the nozzle. The convergent point of the nozzle acts like a bottleneck trying to slow the fluid and compress it into the reduced crosssection of the nozzle. As it leaves the minimum crosssection it expands into the divergent spaces of the nozzle increasing in velocity as it expands. ++_+ No: it gains velocity through the convergence but in the diverging section, trades velocity for pressure.
What is the exit diameter of a number 4 size gas tungsten arc welding nozzle?
1/4"
What has the author Kenneth O Davidian written?
Kenneth O. Davidian has written: 'Nuclear thermal rocket nozzle testing and evaluation program' -- subject(s): Nozzles, Nuclear rockets, Rockets (Aeronautics)
How do rockets off?
rockets take off when gases are shot out of the opposite direction with great force. The gases are conctrated by being forced through a small nozzle Liquid hydrogen and liquid oxygen is the fuel.
Why Cd value is high in nozzle meter than orifice meter?
The Cd value (coefficient of discharge) is typically higher in a nozzle meter compared to an orifice meter because the flow profile and pressure recovery characteristics are better in a nozzle meter. Nozzle meters have a converging-diverging shape, which helps in minimizing energy losses and improving the accuracy of flow measurement when compared to an orifice meter design.
What kind of nozzles do rockets usually have?
In general , they all has Laval nozzle. But depending from the stage, it could be smaller or bigger. For optimal performance the same engine from the first stage will have shorter nozzle than from the second stage. That's because the pressure on the end point of the nozzle must be equal to the pressure of atmosphere.
