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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?
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.
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 is the distance of Vena-Contracta from Nozzle?
The vena contracta is typically located at a distance of approximately half the diameter of the nozzle downstream from the nozzle exit. This is the point where the fluid stream reaches its minimum cross-sectional area and maximum velocity, following the contraction caused by passing through the nozzle. The exact distance can vary depending on factors like the flow conditions and the specific geometry of the nozzle.
