| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating oil system having an air-cooled and lubricating oil-cooled heat exchanger in a turbofan engine. SOLUTION: This heat exchanger system has the air-cooled heat exchangers 14 and 24 and the lubricating oil-cooled heat exchangers 35 and 39 for cooling lubricating oil at a selectively changeable cooling speed in an air flow 13 in a branch structure 10 of the turbofan engine. The air-cooled first heat exchanger 14 is installed so that a part of the fan air flow 13 can be made to flow to a core 25 of the first heat exchanger 14, and is also installed in the second heat exchanger so that the second heat exchanger 24 can make a part of the fan air flow selectively flow to the core of the second heat exchanger, and a core actuator selectively increases or reduces a part of the corresponding air flow 13 flowing in an oil transport pipe 25 of a movable core 26. COPYRIGHT: (C)2008,JPO&INPIT |
