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US 8,133,012 B2Granted
Transonic airfoil and axial flow rotary machine
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsNaonori Nagai, Junji Iwatani
Life of this patent
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Abstract
Sectional profiles close to a tip 124 and a part between a midportion 125 and a hub 123 are shifted to the upstream of an operating fluid flow in a sweep direction. Accordingly, an S shape is formed in which the tip 124 and the part between the midportion 125 and the hub 123 protrude. As a result, it is possible reduce various losses due to shook, waves, thereby forming a transonic airfoil having an excellent aerodynamic characteristic.
Claims8
A transonic airfoil operating in a flow region of a transonic or faster operating fluid, the transonic airfoil comprising:
- a hub located close to a connection position to a rotation shaft;
- a midportion located at a medium position in a radial direction which is a radial direction of the rotation shaft;
- a tip located farthest from the rotation shaft in the radial direction;
- a leading edge located on an upstream of the inflowing operating fluid;
- and
- a trailing edge located on a downstream of the operating fluid;
- wherein
- sectional profiles stacked in the radial direction of the airfoil are continuously shifted in parallel to a first direction connecting the leading edge and the trailing edge, further wherein
- the sectional profiles close to the tip and the sectional profiles between the midportion and the hub are shifted to the upstream of the first direction to form an S shape, and
- the shift amount of the sectional profiles close to the tip in the first direction is greater than the shift amount of the sectional profiles between the midportion and the hub in the first direction.
7 more elements
Dependencies are inferred from the claim text.