calculation of thrust in cd nozzle

purushothge · February 25, 2012, 03:05

Dear All ,
How to calculate the thrust from fluent for the rocket nozzle ?
Should i use Mass weighted_avg to get the velocity magnitude for calculating momentum and pressure thrust ?

mandour78 · September 24, 2014, 14:06

Hi purushothge,
Did you find way to calculate the thrust?
Please tell me because I am facing the same problem.......
thank you.

amin.z · September 25, 2014, 02:25

Hi

I think the thrust of nozzles is caused by two types generally
1. Trust due to motion of the fluid mass
2. Trust due to difference in gauge pressure at the nozzle outlet

I think Mthrust(mass flow thrust) equal to: (Mass flow)*(Velocity_exit)
and Pthrust(pressure difference thrust) equal to: (Pressure_exit)*(area_exit)

February 25, 2012, 03:05	calculation of thrust in cd nozzle	#1
purushothge New Member PURUSHOTHAMAN Join Date: Jan 2011 Posts: 13 Rep Power: 15	Dear All , How to calculate the thrust from fluent for the rocket nozzle ? Should i use Mass weighted_avg to get the velocity magnitude for calculating momentum and pressure thrust ?

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September 24, 2014, 14:06		#2
mandour78 New Member M. Mandour Join Date: Sep 2014 Posts: 2 Rep Power: 0	Hi purushothge, Did you find way to calculate the thrust? Please tell me because I am facing the same problem....... thank you.

September 25, 2014, 02:25		#3
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 15	Hi I think the thrust of nozzles is caused by two types generally 1. Trust due to motion of the fluid mass 2. Trust due to difference in gauge pressure at the nozzle outlet I think Mthrust(mass flow thrust) equal to: (Mass flow)(Velocity_exit) and Pthrust(pressure difference thrust) equal to: (Pressure_exit)(area_exit)