Would this be possible in a Rocket Engine combustion chamber

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Discussion Overview

The discussion revolves around the feasibility of feeding liquid fuel into a rocket engine combustion chamber where the combustion chamber pressure is significantly higher than the fuel pump pressure. Participants explore the requirements for fuel flow in rocket engines, particularly in the context of pressure-fed systems.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether a fuel pump supplying 100 psi can effectively feed fuel into a combustion chamber with an average pressure of 300 psi.
  • Another participant states that for liquid fuel rocket engines, the fuel pump must have a pressure greater than that of the combustion chamber for fuel to flow, suggesting various methods to achieve this.
  • Some participants provide links to articles on pressure-fed engines and turbopumps as resources for further understanding.
  • Performance specifications of the F-1 rocket engine are mentioned, highlighting that its chamber pressure was around 1000 psi, which raises considerations about the pressures involved in rocket engine design.

Areas of Agreement / Disagreement

Participants generally agree that the fuel pump pressure must exceed the combustion chamber pressure for fuel flow, but the discussion remains unresolved regarding the specific scenario presented in the initial question.

Contextual Notes

The discussion does not resolve the specific conditions under which fuel flow might occur, nor does it clarify the implications of different pressure levels in rocket engine design.

strk
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Lets say if i have a bell nozzle rocket engine such as this one : http://www.braeunig.us/space/pics/fig1-04.gif and inside the combustion chamber i have an average pressure of around 300 psi. If i wanted to feed in liquid fuel into it while the fuel pump is only able to supply 100 psi of fuel.

my question is would this be able to work? or will it not be able to send any fuel inside the rocket engine. Thanks
 
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SteamKing said:
The performance specs of the F-1 rocket engines used in the first stage of the Saturn V rockets which sent the Apollo spacecraft to the moon are pretty impressive:

http://en.wikipedia.org/wiki/Rocketdyne_F-1
That is pretty impressive given the fact that chamber pressure was around 1000 psi
 

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