AXIAL FLOW FAN, METHOD FOR MODIFYING COMPRESSOR AND TURBINE BLADE, AND BLADE OBTAINED BY MODIFICATION

Title:

AXIAL FLOW FAN, METHOD FOR MODIFYING COMPRESSOR AND TURBINE BLADE, AND BLADE OBTAINED BY MODIFICATION

Document Type and Number:

WIPO Patent Application WO/2019/064761

Kind Code:

A1

Abstract:

Provided is a blade in which secondary flow loss has been reduced without changing the aerodynamic design of a base blade. This blade comprises: a base blade part; and a protruding part provided on a positive-pressure surface in the vicinity of the trailing edge of at least one among a hub region and a tip region of the base blade part. The blade form in a span direction in which the protruding part is provided is obtained by changing the trailing edge part curve of a base blade form into a corrected trailing edge part curve. The corrected trailing edge part curve comprises: a portion on a negative-pressure side with respect to the trailing edge of the trailing edge part curve of the base blade form in the span direction position at which the protruding part is provided; and a protruding part curve. The protruding part curve comprises a concave leading-side curve and a convex trailing-side curve. The trailing-side curve is a portion of an ellipse or a circle, and the leading-side curve is a curve that smoothly connects the trailing side curve and the positive pressure-side curve.

Inventors:

FURUKAWA JUO (JP)
HAMABE MASAAKI (JP)

Application Number:

PCT/JP2018/024385

Publication Date:

April 04, 2019

Filing Date:

June 27, 2018

Export Citation:

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Assignee:

IHI CORP (JP)

International Classes:

F01D5/14; F01D9/02; F01D25/00; F02C7/00; F04D29/38; F04D29/54

Foreign References:

DE102014005852A1	2015-10-22
US20130129515A1	2013-05-23
JP2012505340A	2012-03-01
JPH0526004A	1993-02-02

Other References: