Fluid and fuel delivery systems reducing pressure...

F - Mech Eng,Light,Heat,Weapons – 02 – C

Patent

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Details

F02C 7/22 (2006.01) F23M 99/00 (2010.01) F02M 55/02 (2006.01) F02M 55/04 (2006.01) F04B 11/00 (2006.01) F16L 55/02 (2006.01) F23K 5/02 (2006.01) F23K 5/14 (2006.01) G10K 11/16 (2006.01) G10K 11/172 (2006.01) G10K 11/175 (2006.01)

Patent

CA 2430915

Fluid and fuel delivery systems reducing pressure fluctuation. Such systems use a conduit that attenuates pressure fluctuations. Preferably, the conduit attenuates pressure fluctuations by reflecting a portion of a pressure wave within the fluid flow so that reflected pressure waves within the flow interfere with incident pressure waves within the flow, thereby reducing the pressure fluctuations. In one embodiment, such a conduit may be formed as a quarter wave stub, in line with the fluid flow. Advantageously, exemplary of the invention, hoot noise in an engine may be reduced by damping pressure fluctuations in the fuel delivery system to the engine.

Cette invention concerne des systèmes d'alimentation en liquide et en carburant, qui permettant d'atténuer les variations de pression et des moteurs ainsi équipés. De tels systèmes reposent sur l'emploi d'un conduit qui atténue les variations de pression. A cette fin, le conduit réfléchit de préférence une partie de l'onde de pression dans le flux de liquide de sorte que les ondes de pression réfléchies dans le flux de liquide interfèrent avec les ondes de pression incidente dans le flux, ce qui a pour effet de réduire les variations de pression. Selon un mode de réalisation, un tel conduit peut être constitué par un élément dont la longueur correspond à un quart d'onde, et qui est disposé dans l'axe du flux de liquide. Ce système offre l'avantage de réduire les sifflements du moteur du fait que les variations de pression son amorties dans le circuit d'alimentation en carburant.

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