GB612060A - Improvements in or relating to turbo-compressor apparatus - Google Patents

Abstract

612,060. Liquid-fuel burners. DE HAVILLAND ENGINE CO., Ltd., HALFORD, F. B., AMOS, F. W., and DOWNES, D. G. May 16, 1946. Nos. 14871 and 35035. [Classes 75 (i) and 75 (iii)] In a turbo-compressor the main fuel is ignited by the flame of a gaseous or liquid auxiliary fuel ignited by a catalytic device. A tube A projecting into a combustion chamber B' of a turbo compressor is supplied with air from the diffuser by a tube E and with combustible gas, preferably hydrogen, from a pressure bottle by a tube D. The mixture is ignited by a catalyst H, such as platinum black, contained in a chamber G having a removable cap G<2> and the flame travels along the tube A to ignite the main fuel sprayed into the combustion chamber B'. A wire gauze A<5> in the gas inlet prevents flash back and holes A<1> in the tube A, where it traverses an air jacket C' surrounding the combustion chamber B' supply additional air to the tube A. In an alternative construction, Fig. 4, inflammable gas enters an inlet L' in an annular chamber L' surrounding the main fuel supply tube K and mixes with air from inlets L' before being ignited by a platinum wire H<3>, Fig. 7, wound on an apertured annulus H' secured between the burner head K' and the outer casing L. A mixture of air and inflammable gas may be supplied to the annular space L' of the burner from an outlet N in a mixing chamber, Fig. 8, comprising an inner compartment M communicating with an outer casing M' through an outlet M', air and gas being supplied to the inner compartment M by tubes E' and J' respectively. The flow of fuel to the main burner may be automatically controlled by the flow of auxiliary fuel to the igniter, or preferably, both fuel supplies may be automatically controlled by the starting motor. According to the first provisional Specification the provision of an igniter in each of the combustion chambers of an apparatus employing mutiple combustion chambers may not be necessary since the ignition flame may be propagated through lateral passages connecting adjacent combustion chambers ; but in apparatus employing a single annular combustion chamber more than one igniter may be employed.