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The mass flow through a convergent – divergent nozzle is maximum when the pressure at:
- a)Exit is equal to the critical pressure
- b)Exit is less than atmospheric pressure
- c)Throat is equal to the exit pressure
- d)Throat is equal to the critical pressure
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The mass flow through a convergent – divergent nozzle is maximum...
Choked flow is a limiting condition where the mass flow will not increase with a further decrease in the downstream pressure environment while upstream pressure is fixed.
For chocked flow in convergent – divergent nozzle, Mach number at throat is equal to 1 and the pressure at throat is equal to the critical pressure.
Critical pressure ratio for a choked nozzle:
Where p* is the critical pressure and p0 is the inlet pressure
Most Upvoted Answer
The mass flow through a convergent – divergent nozzle is maximum...
Nozzle can be calculated using the equation:
m_dot = A * rho * V
Where:
m_dot is the mass flow rate,
A is the area of the nozzle,
rho is the density of the fluid, and
V is the velocity of the fluid.
In a convergent nozzle, the fluid velocity increases as it flows through the nozzle, leading to a decrease in the cross-sectional area. This increase in velocity is achieved by converting the pressure energy of the fluid into kinetic energy.
To calculate the mass flow rate, you will need to know the area of the nozzle, the density of the fluid, and the velocity of the fluid at the nozzle exit. The density of the fluid can be obtained from the fluid properties or measured experimentally. The velocity at the nozzle exit can be calculated using the Bernoulli's equation or measured using appropriate instruments.
Once you have all the required values, you can substitute them into the equation to calculate the mass flow rate.
m_dot = A * rho * V
Where:
m_dot is the mass flow rate,
A is the area of the nozzle,
rho is the density of the fluid, and
V is the velocity of the fluid.
In a convergent nozzle, the fluid velocity increases as it flows through the nozzle, leading to a decrease in the cross-sectional area. This increase in velocity is achieved by converting the pressure energy of the fluid into kinetic energy.
To calculate the mass flow rate, you will need to know the area of the nozzle, the density of the fluid, and the velocity of the fluid at the nozzle exit. The density of the fluid can be obtained from the fluid properties or measured experimentally. The velocity at the nozzle exit can be calculated using the Bernoulli's equation or measured using appropriate instruments.
Once you have all the required values, you can substitute them into the equation to calculate the mass flow rate.
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