Where does the thrust of a rocket engine actually acts?

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niggannivea
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Joined: 03 Jun 2019, 16:41

Where does the thrust of a rocket engine actually acts?

Post by niggannivea » 03 Jun 2019, 16:43

Few things I know (which may be wrong): The hot gases are accelerated from near zero velocity in combustion chamber to supersonic velocity at the nozzle exit, the rate of change of momentum is equal to the force. Assuming that the exit velocity is nearly constant, Force = mass flow rate times exit velocity.

Now my question is that where does this force actually acts on inside the rocket engine? What if I integrate the pressure on entire internal surface of the con-di nozzle to get a net force, and say that the vertical component of that force is thrust and the horizontal component is trying to rip the nozzle apart?

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