| 摘要 |
<p>An ejector, comprising a nozzle (1), a mixing section (2), and a diffusion section (3); the nozzle (1) comprises a nozzle front portion (4), a nozzle throat portion (5), and a nozzle back portion (6); the wall surface of the nozzle (1) is provided with an annular cavity (7) thereon; the fluid inlet end of the annular cavity (7) communicates with the nozzle front portion (4); an end surface between the annular cavity (7) and the nozzle front portion (4) is provided with a plurality of through holes (9); the fluid outlet end of the annular cavity (9) communicates with the nozzle throat portion (5) or the nozzle back portion (6); the annular cavity (9) serves as a bypass, such that most of the working fluid directly flows into the mixing section (2) of the ejector through the nozzle throat portion (5); another portion of the working fluid flows along the nozzle front portion (4), through the annular cavity (9), and out of the nozzle throat portion (5) or the nozzle back portion (6), converges with the first portion of the working fluid, and then flows into the mixing section (2) of the ejector. Because the arrangement of the annular cavity (9) does not change the pressure of the working fluid entering the nozzle, the Mach number reached by the working fluid flowing through the nozzle will not be changed according to the nozzle working principle, such that the flow quantity of the suctioned driving fluid is basically unchanged, thus improving ejector performance.</p> |
