Sumitomo Rubber Industries Limited

Kawasaki Jukogyo Kabushiki Kaisha

Kawasaki Jukogyo Kabushiki

Keisuke Hashimoto

Yusuke Sakai

Eisuke Hirosue

Shinya Suga

In an apexof a tire, a reinforcing portionis located inward of a main bodyin an axial direction. When a position on an outer surface of the tireat which position a height from a BBL is 14 mm is defined as a first point Pand a position on the outer surface of the tireat which position a height from the BBL is 20 mm is defined as a second point P, the reinforcing portionoverlaps the first point Pand the second point Pin a radial direction. A loss tangent of the reinforcing portionis equal to a loss tangent of the main bodyor less than the loss tangent. A hardness of the reinforcing portionis equal to a hardness of the main bodyor greater than the hardness.

Pneumatic tire

To provide a jet engine booster structure capable of obtaining a desired pressure ratio with fewer stages. The moving blade of a booster is a boundary layer control tandem moving blade.

Jet engine booster structure

A tandem blade lattice having characteristics enhanced is provided. In a high pressure ratio blade lattice, inevitable generation of an shock wave is shifted, as much as possible, toward a rear portion of an upper surface of a front blade to inhibit separation from a blade surface from being caused by interference of the shock wave and a boundary layer, and boundary layer control is performed such that a speed, a momentum and the like of a jet flowing from a trailing edge of a lower surface of the front blade onto an upper surface of a rear blade are regulated to obtain a flow along the upper surface of the rear blade, so that separation of the boundary layer on the upper surface of the rear blade is restricted to a vicinity of a trailing edge.

Growing community of inventors

Kobe, Japan

Keisuke Hashimoto