Ihi Corporation

The Society of Japanese Aerospace Companies

Ruriko Yamawaki

Hiroshi Hamazaki

Masaaki Hamabe

Ayumi Mamada

Akira Takahashi

Katsunori Mitsuhashi

A turbine blade has a profile including a blade suction side line, a blade pressure side line, and a blade trailing edge positioned between the rear ends of the blade suction side and pressure sidelines. The blade trailing edge of the profile is formed by connecting a pressure side arc-like curve having a constant radius of curvature and extending from the rear end of the blade pressure side line toward the camber line of the profile, and a suction side line portion which extends from the rear end of the blade suction side line toward the camber line while passing through a region closer to the camber line than a symmetric curve portion which is line-symmetric to the pressure side arc-like curve with respect to the camber line. The suction side line portion is represented by curves constituting ellipses which constitute ellipses, and a straight line.

Turbine blade

A turbine blade has a profile including a blade suction side line, a blade pressure side line, and a blade trailing edge formed by a curve connecting the rear ends of the blade suction side and pressure side lines to each other, wherein the curve forming the blade trailing edge of the profile is formed by connecting a pressure side curve portion which has an arc shape having a constant radius of curvature and extending from the rear end of the blade pressure side line toward the camber line of the profile, and a suction side curve portion which extends from the rear end of the blade suction side line toward the camber line while passing through a region closer to the camber line than a symmetric curve portion which is line-symmetric to the pressure side curve portion with respect to the camber line.

The invention relates to wall of a turbo machine having a cascade of blades. The wall includes: a first platform facing a first passage between blades in the cascade of blades; and a second platform facing a second passage between adjacent cascade of blades on an upstream side and cascade of blades on a downstream side, and having a circumferential outline having a distribution of radial positions. According to the invention, loss due to disturbance of flow through the gap of axially adjacent walls can be reduced.

Growing community of inventors

Tokyo, Japan

Ruriko Yamawaki