Turbine blade and turbine
AssigneeHitachi, Ltd.
InventorsKiyoshi Segawa, Yoshio Shikano, Yoshiaki Yamazaki, Shigeki Senoo, Yoshiharu Nakayama
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Abstract
The pressure distribution curve of the blade suction-side surface excluding the leading edge portion and the trailing edge portion drops in two stages in the area from the leading edge to the minimum pressure point.
Claims10
A turbine moving blade operated by working fluid, wherein a blade profile is formed such that the pressure distribution curve defined by the pressure on the blade surface of suction side of the moving blade drops in two stages in the area from the leading edge to the minimum pressure point.
A turbine moving blade having a maximum blade load point on the trailing edge side, wherein a blade profile is formed such that the pressure distribution curve of the blade surface of suction side of the moving blade excluding the leading edge portion and the trailing edge portion drops in two stages in the area from the leading edge to the minimum pressure point.
A turbine moving blade operated by working fluid, wherein a blade profile is formed such that when the pressure distribution curve is defined by the pressure on the blade surface of suction side of the moving blade, the pressure distribution curve has the first area in which a pressure drops from the leading edge of the moving blade to the first pressure point, the second area in which a pressure drops or maintains from said first pressure point to the second pressure point, and the third area in which a pressure drops from said second pressure point to the minimum pressure point.
A turbine moving blade operated by working fluid, wherein when the blade loading distribution curve is defined by the blade load of each position on the blade surface of the moving blade, the area from the leading edge to the maximum blade load position of the curve portion of the blade loading distribution curve excluding the leading edge portion and the trailing edge portion is divided into two portions.
A turbine which is arranged such that a plurality of stationary blades and moving blades are disposed in the rotor's circumferential direction and a cascade of said stationary blades and said moving blades forms a stage, wherein the blade profile of said moving blade is formed such that the pressure distribution curve defined by the pressure of the blade surface of suction side of said moving blade drops in two stages in the area from the leading edge to the minimum pressure point.
Dependencies are inferred from the claim text.