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Design choice of liquid ring pump
From the above analysis, the flow process in the liquid ring pump is much more complicated than the general vane pump, and its complexity is manifested in the following aspects:
(1) The flow in the pump has a free surface, and the shape of the surface and the velocity and pressure distribution thereon depend on the phase action of the liquid flow and the gas flow, which is unknown. But in the flow and gas
When the flow is analyzed, the velocity and pressure of the surface and the boundary conditions must be known. Obviously this is a very difficult subject.
(2) The flow movement in the flow path between the leaves of the liquid ring pump is unsteady. The flow in the suction zone flows from the inside to the outside, and in the compression zone and the exhaust zone from the outside to the inside. Therefore, if the liquid ring is to be carried out
The flow analysis of the pump must use an unsteady analysis method, which will greatly increase the calculation workload.
(3) In the general vane pump impeller, the structure of the flow field is cyclically symmetrical, that is, the flow in any inter-leaf flow passage is the same, so it is only necessary to analyze an inter-leaf flow passage.
In the liquid ring pump, the flow in each flow path between the leaves is different, and the flow in each flow path is mutually influenced by the liquid ring outside the impeller, and is connected as a whole, so the whole must be
The flow field is analyzed as a whole, which in turn will greatly increase the amount of calculation.
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