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Pulse Detonation Engine (PDE)

  1. Dec 7, 2011 #1
    Hi,
    I'm new here and i'm really hoping that someone could answer my question.
    i am trying to design a PDE but the problem about this is that the temperature caused by detonation (3461 K) is so high that it is really difficult to find a suitable material for the detonation chamber and thermal barrier coating (TBC). Does anyone have a suggestion on this?

    and if i were to use pyrolytic graphite for the TBC, how am I supposed to calculate what is the required thickness, if the melting point of my detonation chamber material is 1773K? i dont have the rate of heat flow. is there an industrially typical/ideal heat flow rate across the walls of engines?

    Thanks in advance!
     
  2. jcsd
  3. Dec 7, 2011 #2
    This might be a completely mad suggestion, but I'm reminded of the fact that the Apollo/Soyuz/Dragon space capsule design prevents the capsule from heating by having a blunt shape which tends to push the superheated plasma around the body of the spacecraft heatshield on a cushion of compressed air.

    Mybe you could exploit a similar effect - have a layer of air or air/fuel which acts as a boundary layer and prevents the material of the combustion chamber/surface (is this a shockwave rider?) from heating.

    Good luck!
     
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