Mechanical Engineering - Steam Nozzles and Turbines - Discussion

6. 

The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

[A]. remains constant
[B]. decreases
[C]. increases

Answer: Option A

Explanation:

No answer description available for this question.

Ranjesh said: (Jul 13, 2013)  
Because discharge(Q) remain constant always through a pipe.

Mayur said: (Dec 6, 2014)  
The discharge of steam in CD nozzle INCREASES after throat because pressure energy in convergent part is converted into kinetic energy in divergent part.

Ravi Kishan said: (Jan 19, 2015)  
Discharge in any pipe flow remains constant only the velocity decrease when area increases.

Praveen said: (Aug 28, 2015)  
What is convergent and what is divergent?

Jatin Lahoriya said: (Aug 30, 2015)  
Continuity equation self satisfies the statement as mass flow rate of any fluid remains constant throughout any cross section (here it is a nozzle).

Sudesh Jangid said: (Nov 13, 2015)  
P decrease then v increase, so according av = c.

v increase Q discharge increase.

Sudesh Jangid said: (Nov 13, 2015)  
P decrease then v increase, so according av = c.

v increase Q discharge increase. So in divergent portion of nozzle P remain constant.

So Q will be remain content.

Arijit Jana said: (Dec 31, 2015)  
How can it possible? I can not understand please describe.

Prasad said: (Jun 10, 2016)  
The only varying parameters are area and velocity assuming density as constant for sub sonic flow. Discharge is always constant for entire nozzle.

Sharad said: (Jul 19, 2016)  
C is the answer. Because the discharge is not constant as area varies from convergent section to throat and throat to divergent section also velocity is different therefore Q = A * V.

A and V varies so Q also varies it us not constant.

To have higher velocity and discharge we use C-D nozzle.

In convergent nozzle, we have a constraint for above two factor.

Lalu said: (Apr 17, 2017)  
What if flow is compressible?

Shadab Alam said: (Apr 28, 2018)  
What does discharge mean?

Vishnu Gopi said: (Feb 26, 2020)  
Discharge is always remaining constant after the throat that means in divergent portion of the nozzle.

Bereket said: (Jul 27, 2020)  
Q = V1A1 = V2A2 is flow rate thus Q is constant.

Patel Uvesh said: (Dec 26, 2020)  
Mass flow is always constant and m = area * velocity /specific volume.
Q = area * velocity.

Patel Uvesh said: (Dec 26, 2020)  
Mass flow is always constant and m = area * velocity /specific volume.
Q = area * velocity.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.