Blade for a water turbine
AssigneeAtlantis Resources Corporation Pte Limited
InventorsJohn Keir, Sutthiphong Srigrarom
Life of this patent
Estimating the term…
Abstract
A turbine blade is described which includes a blade root; a blade tip; a leading edge extending from the blade root to the blade tip; a trailing edge extending from the blade root to the blade tip; a blade root chord defined as a straight line between the leading edge and the trailing edge at the blade root; a blade tip chord defined as a straight line between the leading edge and the trailing edge at the blade tip; wherein the blade tip chord is angularly displaced from the blade root chord by a twist angle of between 50° and 90°.
Claims15
A blade for driving an axial-flow underwater power generation machine, the blade in use being adapted for rotation about a rotation axis in response to water flow from a direction parallel with the rotation axis, the underwater power generation machine being adapted to be mounted in a body of the water and having a power generation unit adapted to be driven by the blade so as to generate power, the blade comprising:
- a blade root mounted to a hub;
- a free blade tip;
- a leading edge extending from the blade root to the blade tip;
- a trailing edge extending from the blade root to the free blade tip;
- a blade profile for generating lift when the blade rotates with the hub about the rotation axis the blade profile defining two blade surfaces extending between the leading edge and the trailing edge;
- a blade root chord defined as a straight line between the leading edge and the trailing edge at the blade root;
- and a blade tip chord defined as a straight line between the leading edge and the trailing edge at the free blade tip;
- wherein the blade tip chord is angularly displaced from the blade root chord by a twist angle of between 70 degrees and 90 degrees.
A blade for driving an axial-flow underwater power generation machine, the blade in use being adapted for rotation about a rotation axis in response to water flow from a direction parallel with the rotation axis, the underwater power generation machine being adapted to be mounted in a body of the water and having a power generation unit adapted to be driven by the blade so as to generate power, the blade comprising:
- a blade root mounted on a hub;
- a free blade tip;
- a leading edge extending from the blade root to the blade tip;
- a trailing edge extending from the blade root to the blade tip;
- a blade profile for generating lift when the blade rotates with the hub about the rotation axis, the blade profile configured to uniformly distribute incoming water flow across the blade from the blade root to the blade tip, the blade profile defining two blade surfaces extending between the leading edge and the trailing edge;
- a blade root chord defined as a straight line between the leading edge and the trailing edge at the blade root;
- and
- a blade tip chord defined as a straight line between the leading edge and the trailing edge at the blade tip;
- wherein the blade tip chord is angularly displaced from the blade root chord by a twist angle of between 50 degrees and 90 degrees.
Dependencies are inferred from the claim text.