Rocket engine expansion | Wikipedia audio article
Channel: wikipedia tts
Date: 29/05/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Rocket_engine_nozzle


00:00:31 1 History
00:01:04 2 Atmospheric use
00:03:09 3 Vacuum use
00:04:28 4 One-dimensional analysis of gas flow in rocket engine nozzles
00:07:35 5 Specific impulse
00:07:54 6 Aerostatic back-pressure and optimal expansion
00:08:11 7 Optimal shape
00:08:57 8 Advanced designs
00:09:05 9 See also
00:15:18 10 References
00:16:47 11 External links
00:18:41 Advanced designs
00:21:59 See also



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SUMMARY
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A rocket engine nozzle is a propelling nozzle (usually of the de Laval type) used in a rocket engine to expand and accelerate the combustion gases produced by burning propellants so that the exhaust gases exit the nozzle at hypersonic velocities.
Simply: the rocket (pumps and a combustion chamber) generates high pressure, a few hundred atmospheres.  The nozzle turns the static high pressure high temperature gas into rapidly moving gas at near-ambient pressure.