
1) Air blast device 2) Energy conversion 3) Forge apparatus
Found on
https://www.crosswordclues.com/clue/trompe

A trompe is a water-powered gas compressor, commonly used before the advent of the electric-powered compressor. A trompe is somewhat like an airlift pump working in reverse. Trompes were used to provide compressed air for bloomery furnaces in Catalonia and the USA. The presence of a trompe is a signature attribute of a Catalan forge, a type of blo...
Found on
http://en.wikipedia.org/wiki/Trompe

• (n.) A trumpet; a trump.
Found on
http://thinkexist.com/dictionary/meaning/trompe/

A trompe is a water blowing engine. It consists of a long vertical wooden pipe, the lower end of which runs into an air chest. At the top of the pipe is a cone-shaped plug through which water passes. Air enters through holes near the top end, and is forced down into the air chest under pressure by the falling water, the pressure being dependant upo...
Found on
http://www.probertencyclopaedia.com/browse/GT.HTM
No exact match found.