초록 ▼

A variable cycle turboshaft engine includes a remote fan system and respective high and low pressure systems for selectively driving the fan system in such a manner as to provide VTOL takeoff capability and minimum specific fuel consumption (SFC) at cruise and loiter conditions. For takeoff the fan

A variable cycle turboshaft engine includes a remote fan system and respective high and low pressure systems for selectively driving the fan system in such a manner as to provide VTOL takeoff capability and minimum specific fuel consumption (SFC) at cruise and loiter conditions. For takeoff the fan system is primarily driven by the relatively large low pressure system whose combustor receives the motive fluid from a core bypass duct and, for cruise and loiter conditions, the fan system is driven by both a relativelysmall high pressure core and the low pressure system with its combustor inoperative. A mixer is disposed downstream of the high pressure system for mixing the relatively cold air from the bypass duct and the relatively hot air from the core prior to its flow to the low pressure turbine.

대표청구항 ▼

An improved turbomachine of the type having in flow series a compressor, a combustor and a turbine wherein the improvement comprises: (a) a bypass duct disposed adjacent the combustor and fluidly communicating with the compressor; (b) a mixer partially disposed in said bypass duct for receiving a po

An improved turbomachine of the type having in flow series a compressor, a combustor and a turbine wherein the improvement comprises: (a) a bypass duct disposed adjacent the combustor and fluidly communicating with the compressor; (b) a mixer partially disposed in said bypass duct for receiving a portion of relatively cold air from said compressor and a portion of relatively hot air from said combustor and presenting a mixed fluid to the turbine downstream for driving the compressor; and (c) a transfer turbine for receiving hot gases from the combustor, said transfer turbine being drivingly connected to the compressor by way of reduction gear means.