GB885247A - Improvements in or relating to an oscillating column combustion apparatus - Google Patents

Abstract

885,247. Generating combustion products under pressure. JUNKERS & CO. G.m.b.H. Feb. 7, 1958 [Feb. 9, 1957], No. 4028/58. Addition to 804,004. Class 51 (1). An oscillating column combustion apparatus comprises two combustion chambers 23, 24 operating in antiphase, the inlets 21, 22 of the chambers being coupled by means of an oscillating column coupling device. In the embodiment shown, two divergent tubular members 12 and 13 are disposed in axial alignment with their smaller diameter ends adjacent but spaced apart to provide an air inlet 14. The members 12, 13 project into two duct members 15, 16 which converge in the direction of flow, being closed at their larger diameter ends 17, 18. The duct members 15, 16 each converge to a throat 19, 20 and then diverge to form the combustion chamber inlets at 21, 22, ignition apertures being provided at 25, 26. Combustible gas supplied through duct 32 enters a casing which encloses the two divergent inlets 29, 30 of the gas supply pipes 33, 34, the smaller diameter ends being disposed adjacent to each other but spaced apart to provide a gas inlet 31. The ends of the ducts 33, 34 converge at 35, 36 where they enter the throat portions 19, 20 of the duct members 15, 16. The combustion chambers 23, 24 are surrounded by helically wound watercooling pipes 40, 41 the coils of which are spaced apart so as to provide between the combustion chamber walls and surrounding casings 43, 44, helical passages through which combustion gases flow from the chamber outlets 37, 38 to the common discharge duct 47. The ends of the casings 43, 44 are closed by caps 48, 49.