| 摘要 |
<p>A fluid distribution apparatus comprises first and second structures 60,72 having first and second spaced surfaces 66,82, respectively. A rotatable member 84 located between first and second spaced surfaces, the rotatable member and the first and second spaced surfaces defining a dual nozzle including a first annular nozzle outlet defined between the rotatable member 84 and the first spaced surface 66 and a second annular nozzle outlet defined between the rotatable member 84 and surface 72. A central opening 92 is defined through the rotatable member, for conducting fluid to one of said first and second annular nozzle outlets. Vanes 96,98 cause rotation of the rotatable member 84 as fluid flows out of the dual nozzle. <IMAGE></p> |
