Title:
FLUID TRANSPORT PIPE
Document Type and Number:
WIPO Patent Application WO/2016/027438
Kind Code:
A1
Abstract:
The invention relates to a fluid transport pipe. A first unit channel (12a) in which a channel cross-sectional area continuously decreases toward a downstream side and a second unit channel (12b) in which a channel cross-sectional area continuously increases toward the downstream side are alternately combined. A ratio A (= L/{[Smax]1/2- [Smin]1/2}) is set within a range in which a drag reduction rate RDbecomes a positive value. The fluid transport pipe includes: a first opening (22a) formed in a channel wall of the first unit channel; a second opening (22b) formed in a channel wall of the second unit channel; and a bypass channel (20) that allows by-passing of a flow from the first unit channel to the second unit channel through the openings.
Inventors:
ITO HIROKAZU (JP)
TSUTSUI TSUNEO (JP)
TAKEUCHI NAOKI (JP)
IWAMOTO KAORU (JP)
TSUTSUI TSUNEO (JP)
TAKEUCHI NAOKI (JP)
IWAMOTO KAORU (JP)
Application Number:
PCT/JP2015/004025
Publication Date:
February 25, 2016
Filing Date:
August 11, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
UNIV TOKYO NAT UNIV CORP (JP)
UNIV TOKYO NAT UNIV CORP (JP)
International Classes:
F16L55/027; F15D1/02; F15D1/06
Foreign References:
| US3165123A | 1965-01-12 | |||
| DE2156579A1 | 1973-05-24 | |||
| JP5105292B2 | 2012-12-26 |
Other References:
MAMORI HIROYA ET AL: "Direct numerical simulation of turbulent flow in periodically converging-diverging pipe with drag reduction effect", FLUIDS ENGINEERING CONFERENCE, THE JAPAN SOCIETY OF MECHANICAL ENGINEERS, JP, 9 November 2013 (2013-11-09), pages 2pp, XP009186736
YANAGISAWA HANAKI ET AL: "Influence of Periodically Converging-Diverging Pipe Shape on Drag Reduction Effect", THE SOCIETY OF MECHANICAL ENGINEERS KANTO BRANCH GENERAL MEETING LECTURE PROCEEDINGS, THE JAPAN SOCIETY OF MECHANICAL ENGINEERS, JP, 14 March 2014 (2014-03-14), pages 2pp, XP009186737
MAMORI H.: "Teikou Teigen Kouka Wo Yusuru Shuukiteki Kaku-daishukushou Enkannai No Nagare No Chokusetsu Suuchi Keisan", NIHON KIKAI GAKKAI RYUUTAI KOUGAKUBUMON KOUENKAI KOUEN RONBUNSHU, 9 November 2013 (2013-11-09)
YANAGISAWA H.: "Shuukiteki Kakudaishukushoukan Keijyou No Teikou Teigen Kouka Ni Ataeru Eikyou", NIHON KIKAI GAKKAI KANTOU SHIBU 20 KI SOUKAI KOUENKAI KOUEN RONBUNSHU, 14 March 2014 (2014-03-14)
YANAGISAWA HANAKI ET AL: "Influence of Periodically Converging-Diverging Pipe Shape on Drag Reduction Effect", THE SOCIETY OF MECHANICAL ENGINEERS KANTO BRANCH GENERAL MEETING LECTURE PROCEEDINGS, THE JAPAN SOCIETY OF MECHANICAL ENGINEERS, JP, 14 March 2014 (2014-03-14), pages 2pp, XP009186737
MAMORI H.: "Teikou Teigen Kouka Wo Yusuru Shuukiteki Kaku-daishukushou Enkannai No Nagare No Chokusetsu Suuchi Keisan", NIHON KIKAI GAKKAI RYUUTAI KOUGAKUBUMON KOUENKAI KOUEN RONBUNSHU, 9 November 2013 (2013-11-09)
YANAGISAWA H.: "Shuukiteki Kakudaishukushoukan Keijyou No Teikou Teigen Kouka Ni Ataeru Eikyou", NIHON KIKAI GAKKAI KANTOU SHIBU 20 KI SOUKAI KOUENKAI KOUEN RONBUNSHU, 14 March 2014 (2014-03-14)
Attorney, Agent or Firm:
TAKAHASHI, Hideki et al. (Takahashi & Partners Konwa Bldg. 7F, 12-22 Tsukiji 1-chome, Chuo-k, Tokyo 45, JP)
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