METHOD OF REDUCING NOISE OF AIR VEHICLE, LEG STRUCTURE OF AIR VEHICLE AND AIR VEHICLE

Title:

METHOD OF REDUCING NOISE OF AIR VEHICLE, LEG STRUCTURE OF AIR VEHICLE AND AIR VEHICLE

Document Type and Number:

WIPO Patent Application WO/2010/116658

Kind Code:

A1

Abstract:

A first method comprises a step (S5) for investigating the start point of a shear layer as the flow field characteristics around the original shape of an object to be designed, and a step (S7) for giving a planar object to the vicinity of the start point, and is characterized in that the shear layer is kept away from the original shape to which the planar object is given by changing the start point of the shear layer to the edge of the planar object thus reducing aerodynamic noise of the object to be designed. A second method comprises a step (S5) for investigating the static pressure and the air velocity around the original shape as the flow field characteristics around the original shape of an object to be designed, and a step (S7) for giving a planar object covering the surface different from the surface facing the upstream side in the flow direction of air flow in the original shape, and is characterized in that the air velocity is reduced by increasing the static pressure around the original shape thus reducing aerodynamic noise of the object to be designed.

Inventors:

ISOTANI KAZUHIDE
HAYAMA KENJI
KUMADA TOSHIYUKI
ONO MASARU

Application Number:

PCT/JP2010/002209

Publication Date:

October 14, 2010

Filing Date:

March 26, 2010

Export Citation:

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Assignee:

OF JAPANESE AEROSPACE COMPANIE (JP)
KAWASAKI HEAVY IND LTD (JP)
SUMITOMO PRECISION PROD CO (JP)
ISOTANI KAZUHIDE
HAYAMA KENJI
KUMADA TOSHIYUKI
ONO MASARU

International Classes:

B64C23/00; B64C25/10; B64F5/00

Domestic Patent References:

WO2005096721A2

2005-10-20

Foreign References:

JP2009509850A	2009-03-12
JP2008020357A	2008-01-31
JP2006162310A	2006-06-22
JPH07117794A	1995-05-09

Other References: