The primary purpose of the abradable lining in the fan case is to
- allow a minimum tip clearance without blade damage.
- reduce leakage of anti-icing air at the blade tips.
- provide an acoustic medium in the fan duct.
Explanation from PART66Online
The abradable lining, often called the fan track liner, is a soft sacrificial layer bonded to the fan case directly over the blade tips. If the tips touch it they cut their own track in the lining instead of being damaged, so the fan can run with a very small tip clearance and less air leaks over the blade tips. On many engines the same panel is perforated and honeycomb-backed, so it also forms part of the acoustic treatment, but that is a secondary role. It plays no part in anti-icing.
alectaylorob asked · 28 Sep 2026
This answer isnt wrong but isnt its main purpose to provide tip clearance? I feel aiding in acoustics is no where as important?
Community Comments (2)
Please Sign In to post a comment.
More discussions in 15. Gas turbine engine
- Kerosene will burn effectively at an air/fuel ratio of
- The specific gravity of fuel affects
- A scavenge filter is incorporated in a gas turbine lubrication system to
- How is engine oil usually cooled?
- What moves the swash plate away from the minimum stroke position?
- Specific fuel consumption at altitude will