Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
air starters? 1
- Thread starter mectarek
- Start date
-
1
- #2
Hi mectarek:
The turbines of medium to large-sized turbofan usually are moved from starter driven by a bleed air from an APU (auxiliary power unit). The bleed air is extracted from the APU compressor stage and injecting it into the the pneumatic starter . Then the air is exhausted to the outside. This action permits rotate the engine high stage compressor shaft reaching the correct RPM to opening the fuel injection system commanded by the start lever until that regime when the starter is no more necessary. Is possible to replace the APU by an external air power unit.The pneumatic starter is simple and consist in a centrifugal turbine such as car turbo charger. Of course is a little bit more complex.
Cheers
The turbines of medium to large-sized turbofan usually are moved from starter driven by a bleed air from an APU (auxiliary power unit). The bleed air is extracted from the APU compressor stage and injecting it into the the pneumatic starter . Then the air is exhausted to the outside. This action permits rotate the engine high stage compressor shaft reaching the correct RPM to opening the fuel injection system commanded by the start lever until that regime when the starter is no more necessary. Is possible to replace the APU by an external air power unit.The pneumatic starter is simple and consist in a centrifugal turbine such as car turbo charger. Of course is a little bit more complex.
Cheers
- Status
Similar threads
- Question
- Locked
- Question
- Locked
- Question
- Question
