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spinning combustion chambers to make rockets more efficient?

Discussion in 'SpaceX' started by returnero, Jul 11, 2018 at 8:00 PM.

  1. returnero

    returnero New Member

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    so i was thinking that rockets not only lift because heated molecules explode and bump against the bottom portion of the vessel, they rely on pressure, pressure out = pressure up(or lift), because as we all know rocket engines are designed to maximize pressure by limiting the exhaust area at the throat of the rocket

    another way to generate lift is with a propeller on a plane, pressing against the air, but not however in a way that generates pressure, so i think that rocket engines should be able to combine a physical force (like how a propeller would) against the combustion molecules as well as using the physical explosive force of the molecules against the rocket, to combine a fan and an explosive in one rocket

    the way that comes to mind is with a cone like structure with spirals in it and the cone spins very fast in a direction that forces gas downward to create pressure then out the holes designed like the "throat" of the rocket designed to maximize pressure of the combustion chamber in the image below

    [​IMG]

    so basically here are three images of how it could work and look etc. the overall rocket does not spin, just the cone part, i don't know exactly how it should look at all, i call it the dragon shell, kind of a stupid name, i'm sure it's been thought up before

    [​IMG]
    [​IMG]
    [​IMG]


    so in order to actually use this you need electricity and a liquid fuel source, the main uses of this type of "dragon shell" would need to be in the future if we ever get some source to generate electricity very efficiently to spin the shell structure with, so i definitely see this as a futuristic type of propulsion

    the only ways this could be useful now is with a electrical wire incredibly long and sturdy attached to the rocket as it was flying in the air

    another use is in space, using solar cells to generate electricity and periodically when enough electricity is gathered - spin the shells until they're spinning very fast and ignite the fuel. the spinning motion works against the fuel pressing it downward to increase pressure on the throat points. i didn't draw any nozzles below the throat holes and maybe i should have, also it's possible this would work better if the steel rod that delivers fuel/electricity is connected to the base but not any of the overall cone structure itself but i think that is unlikely

    anyway just looking to share ideas nothing else
     
  2. ccutrer

    ccutrer Active Member

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    This would be absolutely no use in space, as you suggest. There’s nothing additional besides the exhaust gases to push against, so your goal would be to push “harder” against them. I don’t know that even with infinite free electricity you would propel the exhaust gases any faster doing this than a current optimal nozzle. It certainly wouldn’t be worth the cost of whatever electrical system you’re going to send up, rather than more fuel.

    While still in the atmosphere, it fits in the entire category of ideas that try to use some traditional form of propulsion to avoid the rocket equation for as long as possible. It seems on the crazier end of the spectrum of what I’ve seen.
     
  3. returnero

    returnero New Member

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    the spinning motion presses against the exhaust to create additional pressure, the exhaust is the pressure, lift is a function of pressure

    if you have increased pressure at the throat, it should propel the gasses faster... i think
     
  4. returnero

    returnero New Member

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    either that or you can propel gases the same speed with less gas
     

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