PURPOSE: To reduce a noise by controlling a change in pressure in fluid in the rear of an object by arranging a stream lining body in a rear end part of the object so as to run in the fluid flowing direction.
CONSTITUTION: A shape of a rear end part 2 of a wing type 1 does not become an ideal streamline shape. An L-shaped metallic plate 3 is fixed in the center of the rear end part 2 of the wing type 1 so that one piece extends rearward, and this is used as a stream lining body. This stream lining body restrains the occurrence of a Karman vortex street caused by a relative speed difference between a speed deficient area and fluid downstream of an object. Rubber plates 4 are separately opposed to each other, and one ends are fixed to the wing type 1, and the other ends are fixed to each other, and the stream lining body as a hollow body is formed. Cloth may be used instead of rubber. A main body such as the fuselage to support the wing type 1 and the rear end part 2 of the wing type 1 are joined together by plural pipes 6, and the end parts of the pipes 6 are opened in the main body 5 and the rear end part 2. Since a pressure difference exists between the main body 5 and the rear end part 2, fluid sucked in the pipes 6 is blown out from the rear end 2, and forms a stream lined body.
| JPS61244698 | NACELLE FOR AIRCRAFT |
| JPS62275896 | AEROFOIL-SHAPED ARTICLE |
| JPH05147572 | METHOD FOR REDUCING FLOWING FRICTIONAL RESISTANCE |
TAKEDA KATSUMI
GOMI MITSUO
| JPS5815765A | 1983-01-29 | |||
| JPS58128997A | 1983-08-01 | |||
| JP59133803B | ||||
| JPS6416497A | 1989-01-19 |