Operation method of a pumping ejector unit and pumping...

F - Mech Eng,Light,Heat,Weapons – 04 – F

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F04F 5/54 (2006.01) F04F 5/46 (2006.01)

Patent

CA 2284699

The present invention pertains to the field of jet-generation techniques and relates to an operation method which essentially comprises supplying a gas- liquid flow from an ejector into a supersonic-flow conversion chamber. The gas- liquid flow is submitted to a sudden expansion in said chamber so as to provide, due to its reduced density, a subsonic or supersonic flow mode. The gas-liquid flow is then slowed down by a pressure jump. This invention also relates to a device for realising this method, wherein said device essentially consists in an apparatus which comprises a supersonic-flow conversion chamber. The chamber has its inlet connected to the outlet of an ejector, while its outlet is connected to a separator. The supersonic-flow conversion chamber is made in the shape of a profiled channel widening step by step in the flow direction. This operation method and the above-mentioned characteristics provide for a more reliable operation of the pumping-ejection apparatus.

Cette invention se rapporte aux techniques de formation de jets et concerne un procédé de fonctionnement qui consiste essentiellement à envoyer un flux de gaz et de liquides provenant d'un éjecteur dans une chambre de conversion de flux supersonique. Dans cette chambre, le flux de gaz et de liquides est détendu soudainement ce qui permet, grâce à une diminution de sa densité, d'obtenir un mode d'écoulement à une vitesse subsonique ou supersonique. Le flux de gaz et de liquides est ensuite freiné par un saut de pression. Cette invention concerne également un dispositif de mise en oeuvre de ce procédé, lequel consiste essentiellement en un appareil qui comprend une chambre de conversion de flux supersonique. L'entrée de cette chambre est connectée à la sortie d'un éjecteur, tandis que sa sortie est connectée à un séparateur. La chambre de conversion de flux supersonique se présente sous forme d'un canal profilé qui va en s'élargissant graduellement dans le sens d'écoulement du flux. Ce procédé de fonctionnement ainsi que les caractéristiques susmentionnées permettent d'améliorer la fiabilité de fonctionnement d'une installation de pompage et d'éjection.

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