| 摘要 |
In order to enhance the effectiveness of an air turbine starter (12), an auxiliary or emergency power unit (16) is adapted to deliver air through a bleed duct (18). This bleed duct (18) is in communication with the air turbine starter (12) which, in turn, is operatively associated with a main turbine engine (14). By placing a combustor (20) within the bleed duct (18) at a point upstream of the air turbine starter (12), it is possible to combust fuel from a source with air from the auxiliary or emergency power unit (16). This substantially increases the available power by elevating air temperature rather than increasing size of the auxiliary or emergency power unit (16). Since it is possible to preheat the air in the bleed duct (18), the air turbine starter (12) can be driven by a smaller auxiliary or emergency power unit (16) to start the main turbine engine (14). |
