Mass and Heat Exchange in Rotating Compressor Cavities With Variable Cob Separation
Tom E. W. Nicholas,
Mikolaj J. Pernak,
Gary D. Lock
et al.
Abstract:Next generation aeroengines will operate at ever-increasing pressure ratios with smaller cores, where the control of blade-tip clearances is an emerging design challenge. Such clearances are affected by the thermal expansion of the compressor discs, where acute thermal stresses govern operating life. A three-dimensional, unsteady and unstable flow structure is induced by destabilising buoyancy forces. The radial distribution of disc temperature is driven by heat transfer at Grashof numbers of order 1013. Such … Show more
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