| 摘要 |
In order to reduce erosion of an impeller (120,130) due to liquid droplets in an incoming flow of gas, the impeller (120,130) comprises converging-diverging bottlenecks; the incoming flow passes through the bottlenecks so that the speed of the gas at the inlet (122) of the impeller first suddenly and substantially increases and then suddenly and substantially decreases; furthermore, the impeller is configured so that, internally after its inlet, the incoming flow is deviated gradually in the meridional plane. |
