Title:
ROTOR BLADE OF AXIAL-FLOW FLUID MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/095470
Kind Code:
A1
Abstract:
Provided is a rotor blade of an axial-flow fluid machine which makes it possible to reduce secondary flow loss in the vicinity of a hub-side end wall, while maintaining the effect of reducing bending stress acting on a blade portion. The rotor blade (RBX) is provided with a blade portion (AFX) extending from a hub portion to a tip portion in a span direction and having a pressure side (PSX) and a suction side (SSX). The blade portion is formed by stacking airfoil-shaped profiles (PX) in the span direction. A stacking line (SLX) connecting the centers of gravity (GX) of the profiles at the respective span direction positions is a straight line parallel to the radial direction in a portion from the hub portion to the outer end of a secondary flow region in the vicinity of the hub portion, and is, in portions from the outer end of the secondary flow region to the tip portion, a curved line of which the distance measured from the straight line parallel to the radial direction toward the suction side in the radial direction gradually increases toward the tip portion.
More Like This:
Inventors:
MITSUKAWA TAKUYA (JP)
FURUKAWA JUO (JP)
HAMABE MASAAKI (JP)
FURUKAWA JUO (JP)
HAMABE MASAAKI (JP)
Application Number:
PCT/JP2019/020316
Publication Date:
May 14, 2020
Filing Date:
May 22, 2019
Export Citation:
Assignee:
IHI CORP (JP)
International Classes:
F01D11/08; F01D5/14; F04D29/32
Domestic Patent References:
| WO2005026501A1 | 2005-03-24 | |||
| WO2012053024A1 | 2012-04-26 |
Foreign References:
| JP2001193692A | 2001-07-17 | |||
| JPH10508671A | 1998-08-25 | |||
| JPH01106903A | 1989-04-24 | |||
| JP2000018003A | 2000-01-18 |
Other References:
See also references of EP 3879072A4
Attorney, Agent or Firm:
NAGATO Kanji (JP)
Download PDF: