How can I prevent overheating in a Pulse Detonation Engine (PDE)?

[mylovelyamber]

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 don't have the rate of heat flow. is there an industrially typical/ideal heat flow rate across the walls of engines?

Thanks in advance!

 

[Blibbler]

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!