Hypersonic test facility

Claim 1

A HEATER ASSEMBLY FOR PRESSURIZED FLUID FLOW, COMPRISING: A TUBULAR CASING HAVING A PRESSURE-RESISTANT EXTERIOR WALL AND AN INTERIOR PASSAGEWAY FOR THE PASSAGE THERETHROUGH OF A FLUID MEDIUM, ONE END OF SAID PASSAGEWAY BEING CONNECTED TO A SOURCE OF PRESSURIZED FLUID AND THE OTHER END THEREOF LEADING TO AN EXPANSION NOZZLE, SAID EXPANSION NOZZLE SERVING AS A BLEED FOR SAID FLUID FLOW, A HEATER ELEMENT FORMING PART OF SAID PASSAGEWAY FOR TRANSFERRING HEAT TO SAID FLOW OF FLUID, AN INDUCTION COIL EXTERIORLY ADJACENT SAID HEATER ELEMENT FOR HEATING SAID HEATER ELEMENT, SPACER MEANS SEPARATING THE INDIVIDUAL TURNS OF SAID INDUCTION COIL, THERMAL INSULATION MEANS DISPOSED BETWEEN SAID COIL AND SAID EXTERIOR WALL, COOLANT MEANS FOR SAID COIL, MEANS EFFECTING A PRESSURERESISTANT SEAL AT EACH END OF SAID TUBULAR CASING; AND MEANS INTEGRALLY FORMED WITH SAID EXPANSION NOZZLE TO FACILITATE COOLING OF SAID EXPANSION NOZZLE.