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CF6-80C2 Active Clearance Control - Air Temp

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CF6-80C2 Active Clearance Control - Air Temp

Old 29th Jul 2019, 23:53
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CF6-80C2 Active Clearance Control - Air Temp

Hi, can someone please direct me to a document that gives the temperature of the air taken from the 7th stage compressor on the CF6-80C2 for control of the HP turbine tip clearance? My searching on the web did not reveal much. Regards Mark
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Old 2nd Aug 2019, 05:36
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Originally Posted by nzhills View Post
Hi, can someone please direct me to a document that gives the temperature of the air taken from the 7th stage compressor on the CF6-80C2 for control of the HP turbine tip clearance? My searching on the web did not reveal much. Regards Mark
7th stage HPC air is used to cool the 1st stage LPT nozzle leading edge and the cavity aft of the 2nd stage HPT rotor. At idle on a standard day, the 7th stage is 49 deg C (I got this figure from some old boroscope training notes - not on the web).

The LPT and HPT cases (Turbine Clearance Control) are cooled by fan discharge air via TCC valves.
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Old 13th Aug 2019, 01:51
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Hi, thanks Lifer01 for your info. Do you have any temperature data on when the engine is operating at 100%? Regards Mark
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Old 13th Aug 2019, 02:44
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Ive tried to look online, downloaded several PDFs but nowhere did I find that detailed info.
Im curious to know too
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