‘Recent tests prove that the component can cool gases from over 1,000 Celsius to ambient temperature in less than 1/20th of a second, according to a statement from Reaction Engines.”
While 1/20 of a second is a very small amount of time, at Mach 3 it is still 150 or so feet...which is still quite a bit longer than the engine. On the other hand, maybe the gasses are slowed enough in the engine so that 1/20 of a second is fast enough.
But it does sound promising!
Depending on the curve, they may not need it to be ambient temperature... it may just need to be below the melting point of say aluminum - 660.3°C.
I’m curious how this single device handles that kind of temperature differential. Granted it’s not a glass dish that cracks under boiling water, but wow.