| 摘要 |
<p>A supersonic flame spray apparatus (10) which comprises a body (12) which defines a bore, said bore having an inlet (20) to receive a feedstock and an inert carrier gas and an outlet the body further defining a converging throat (18) coaxially aligned and communicating with the bore outlet, the converging throat having a converging conical wall (16) facing and spaced from the bore outlet and having a throat outlet at the apex of the conical wall substantially coaxially aligned with the bore; the body further defining an annular fuel passage (32) surrounding the bore, the annular fuel passage having an inlet to receive a fuel and an outlet adjacent the bore outlet and communicating with the throat; the body also defining an annular oxidant gas passage (40) surrounding the fuel passage and having an inlet to receive an oxidant gas and an outlet adjacent the bore and fuel outlets communicating with the throat; and throat receiving the fuel and oxidant gas frm the annular passage outlets prior to mixing and the conical wall spaced sufficiently from the passage outlets to permit mixing and combustion of the fuel and oxidant gas within the throat, the combustion in the converging throat accelerating gaseous combustion products to a high velocity through the throat outlet at the apex of the conical wall coaxially aligned with the bore; and a barrel (14) being coaxially aligned with the bore and communicating with the throat outlet, the barrel having an opening to receive the gaseous combustion products and the feedstock and having an outlet discharging heated feedstock.</p> |
