| 摘要 |
<p>A pumping system comprising means defining a pump having an inlet (4) and an outlet, an inlet conduit (1) connected to said inlet (4) of said pump for the inlet flow of fluid to said pump a delivery conduit connected to said outlet of said pump for the outlet flow of fluid from said pump, means (2) adapted to bleed at least part of the outlet flow, means capable of increasing the velocity head of bleed fluid flow, and means (3) to inject a flow responsive to the condition of bleed fluid flow into the inlet conduit (1) whereby in operation the injected flow increases at least the velocity head of inlet flow of fluid to said pump.</p> |
