abrading percentage
08-28-2007, 02:13 PM,
#1
abrading percentage
Hello

Hopefully all of you are enjoying your work. My question is that what percent thickness of abradable coating should abrade during operation in compressors of jet engines.As the coatings are AlSi graphite based.

Regards

Wasif
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09-04-2007, 02:32 PM,
#2
RE: abrading percentage
Hi Wasif

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From https://www.gordonengland.co.uk/abradable.htm
Quote:The main application of thermal spray abradable coatings is for gas path clearance control in gas turbine engines. In an ideal situation, gas turbine engines would be manufactured with minimal clearance in the gas seal locations, but in the real world these clearances are very much larger to permit operation without catastrophic interaction between rotor and the casing. The clearance at the gas seal locations has a significant effect on the gas turbine engine efficiency which directly translates to fuel consumption. Thermal spray abradable coatings successfully reduce these clearances to a minimum, without the risk of catastrophic failure.
In an ideal world I would say 0%. The more material that is abraded, the larger the clearance becomes. So to a large extent it will depend on the design and construction of the engine.
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09-05-2007, 07:02 AM,
#3
RE: abrading percentage
Thanks Gordon

i agree that abrading percentage upto a large extent will be depending on the design and construction of the engine.

Regards
Wasif
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