Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Atsukuni Waragai

Etsuo Noda

Masayuki Fukutani

Satoshi Kawarada

Tsuneharu Kushida

Hakaru Takamatsu

Kenji Kawamoto

In a device for supplying secondary air in a gas turbine engine provided with an inner shaft () supporting a low pressure compressor and a low pressure turbine and a hollow outer shaft () coaxially nested with the inner shaft and supporting a high pressure compressor and a high pressure turbine, a seal air introduction passage () for introducing a part of high pressure air drawn from the high pressure compressor into a seal section provided in each of the bearing boxes is provided with a high pressure air introduction turbine () attached to the outer shaft in a rotationally fast manner. Owing to the use of the high pressure air introduction turbine, work is extracted from the seal air and cooling air derived from the supplied air and having a high temperature and high pressure air so that an excessive rise in the seal pressure at the normal rotational speed can be avoided and, at the same time, the supplied air can be reduced in temperature thereby avoiding an excessive rise in the temperature of the lubricating oil for the bearing.

Device for supplying secondary air in a gas turbine engine

The stator vane is provided with a leading edge which is cut into a different depth in dependence on a span-wise position so that a blade inlet angle may vary along a span-wise direction according to a prescribed pattern. By thus optimizing the depth of the cut along the leading edge of the stator vane, the leading edge blade inlet angle can be optimized along the entire length of the stator vane even if the stator vane consists of a two-dimensional aerofoil, and the vane is provided with a substantially conformal cross section in parts which are not affected by the cut in the leading edge. Thereby, the efficiency of the turbine can be optimized while minimizing the cost.

Stationary vanes for turbines and method for making the same

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Wako, Japan

Atsukuni Waragai