Device for increasing the power of media flowing along a...

B - Operations – Transporting – 05 – B

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Details

B05B 1/34 (2006.01) B64C 21/10 (2006.01) F15D 1/06 (2006.01) F15D 1/12 (2006.01)

Patent

CA 2312425

In order to increase the power of fast flowing media, the wall surface (2) of a solid body (1) along which the medium flows, is provided with a plurality of recesses (3; F1, F2, F3) that extend by at least one length (1) in the direction of flow (SR) at a depth (t) that is substantially lower than the length thereof (1). At least parts of the recesses (3) have a depth (t) that diminishes in the direction of flow (SR) along said wall surface and the recesses form at least one interruption in the wall surface (2) in the direction of flow. The device can be used to particularly advantageous effect in high pressure nozzles in order to produce a high pressure liquid jet in pipelines, suction tubes for carburettors, exhaust gas tubes and in projectiles such as rockets which can move very quickly through a medium.

Selon l'invention, pour augmenter la force d'un milieu s'écoulant rapidement, la surface de paroi (2) d'un corps (1) solide, le long duquel le milieu s'écoule, est pourvue d'une pluralité de cavités (3; F1, F2, F3) s'étendant au moins sur une certaine longueur (l) dans le sens d'écoulement (SR), dont la profondeur (t) est sensiblement plus petite que leur longueur (1). Au moins des parties desdites cavités (3) présentent une profondeur (t) qui diminue dans le sens d'écoulement (SR), le long de la surface de paroi, et les cavités forment au moins une interruption de la surface de paroi (2) dans le sens d'écoulement. Le dispositif présenté peut être utilisé de façon particulièrement avantageuse dans des buses haute pression destinées à produire un jet de liquide haute pression, dans des pipelines, dans des tuyaux d'aspiration pour carburateur, dans des tuyaux de gaz d'échappement et dans des projectiles, tels que des fusées, qui se déplacent très rapidement à travers un milieu.

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