Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means
Reexamination Certificate
2007-05-15
2011-10-11
Wiehe, Nathaniel (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
C416S230000, C416S24100B
Reexamination Certificate
active
08033789
ABSTRACT:
Aerofoils (22) of a gas turbine engine are provided with a coating (34) or filler (44) of viscoelastic material. As ice accretes on the aerofoils (22) during operation, the resulting aerodynamic stability imbalance induces vibration in the aerofoils (22). The viscoelastic material (34, 44) damps this vibration, and in so doing generates heat, which melts the ice away from the aerofoils (22). Heat-conducting members conduct the heat to regions of the component in which ice accretion is to be prevented. Alternative embodiments are described in which the pseudoelastic behaviour of a shape memory alloy (56), or eddy currents arising from the rotor blades' rotation in an axisymmetric magnetic field, are used as sources of heat.
REFERENCES:
patent: 3357850 (1967-12-01), Baker
patent: 3566493 (1971-03-01), Poucher et al.
patent: 4097193 (1978-06-01), Brunsch et al.
patent: 5931641 (1999-08-01), Finn et al.
patent: 6669447 (2003-12-01), Norris et al.
patent: 2005/0008492 (2005-01-01), Whitehead et al.
patent: 2 011 542 (1979-07-01), None
patent: 2 371 095 (2002-07-01), None
patent: 2 391 270 (2004-02-01), None
patent: 2 397 257 (2004-07-01), None
patent: 2 418 460 (2006-03-01), None
McMillan Alison J
Ravey Eric
Read Simon
Manelli Selter PLLC
Melcher Jeffrey S.
Rolls-Royce plc
Wiehe Nathaniel
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