GB1269123A - Detonation apparatus - Google Patents

Abstract

1,269,123. Detonation type combustion apparatus. ROLLS-ROYCE Ltd. Aug. 14, 1970 [Oct. 29, 1969], No.53017/69. Heading F1L. [Also in Division C7] The invention relates to a detonation apparatus comprising a plurality of combustion chambers 10 into each of which a detonatable mixture of fuel and a gaseous oxident is introduced and detonated. The apparatus comprises a rotary valve member 11 which is mounted on a shaft 27 which is disposed parallel to the combustion chambers 10. The valve member is formed with two diametrically opposed sets of ports 12, 13 each set comprising a port 14 for introduction of nitrogen, a series of ports 16 for the introduction of gaseous fuel such as ethylene, and a series of ports 15 for the introduction of gaseous oxidant such as oxygen, the ports 14, 15, 16 all extending through the valve member from the face 18 to the face 17. The valve member comprises also diametrically opposed recesses 22 which extend from the face 17 but do not extend right through the valve member. The valve member rotates adjacent a manifold member 23 which comprises annular manifolds 24, 25, 26 for nitrogen, ethylene and oxygen respectively, the ports 14 communicating with the nitrogen manifold 24, the ports 16 communicating with the ethylene manifold 25 and the ports 15 communicating with the oxygen manifold 26. After a combustion chamber has been filled with ethylene and oxygen the mixture is detonated by hot combustion gases from a port 22, the chamber then being filled with nitrogen from port 14 the nitrogen acting as a "buffer" to prevent detonation of the ethylene and oxygen as the chamber is again filled. The apparatus may be used to supply combustion gases to a turbine or to a rocket nozzle or for use in coating apparatus as shown in Fig. 3. The apparatus comprises a detonation apparatus 9 as shown in Figs. 1 and 2, nitrogen being supplied to the manifold 24 from ducts 40 and 41. A portion of nitrogen from duct 40 is tapped off through duct 42 and led to a chamber 43 where it picks up coating material contained therein. The nitrogen laden with coating material is fed back to duct 40 and supplied through duct 45 to the ethylene and oxygen manifolds 25 and 26 whereby the coating material is discharged from the combustion chambers together with the combustion gases. The coating material may be tungsten carbide powder which may be used for coating aero engine parts.