Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1998-12-08
2000-09-12
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
F01D 518
Patent
active
061168548
ABSTRACT:
A gas turbine moving blade assembly in which a cooling effect at a leading edge of the blade, which is exposed to a high temperature combustion gas, is enhanced by an arrangement of turbulators in the leading edge. In particular, the turbulators are arranged on a slant and are arranged locally only on portions in which the cooling effect is to be reinforced, so that pressure loss of the cooling air is suppressed to a minimum level. Turbulators (8) are provided obliquely from the leading edge in a direction facing into a flow of the cooling air toward a downstream side of a combustion gas flow on both inner walls within a cooling passage (12). Also, to reduce pressure loss, short turbulators (18) may be similarly arranged between the adjacent turbulators (8). In this case, the ratio of the length (W) of the turbulators to that (Wr) of the short turbulators is Wr/W<0.5. Secondary flows (20a, 20a') are generated along the turbulators (8, 18) to effectively cool joint portions between the leading edge and the turbulators.
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Look Edward K.
Mitsubishi Heavy Industries Ltd.
Nguyen Ninh
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