A fuel spray nozzle 300 has, in order from radially inner to outer with respect to a fuel spray nozzle centreline ‘C’, a coaxial arrangement of: an inner air swirler passage 204 to produce a primary swirling air flow, an annular fuel prefilming lip 206 and at least one annular outer air swirler passage 208 to produce a secondary swirling air flow. Fuel exiting the fuel prefilming lip is atomised into a spray by the primary and secondary swirling air flows. The fuel spray nozzle further includes an annular wall 220 surrounding at least one annular outer air swirler passage 208. A radial distance between the nozzle centreline ‘C’ and a radially inner extremum of the annular wall is defined as a conic exit radius (CER). A radial distance between the nozzle centreline ‘C’ and the prefilming lip is defined as a fuel exit radius (FER), and the conic exit radius and the fuel exit radius have a defined ratio. The annular wall can radially surround the at least one annular outer air swirler passage, and the ratio of the conic exit radius to the fuel exit radius is within the range of 1.5 and 3.0. The fuel nozzle can be modified so that the annular wall dimension increases the ratio of the conic exit radius to the fuel exit radius.


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    Titel :

    Fuel spray nozzle


    Erscheinungsdatum :

    08.04.2020


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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