1. In most cases, the actual working conditions of the centrifugal water pumps in the pumping station often deviate from their design conditions, which reduces the operating efficiency electrically.
2. In most centrifugal pumping stations in my country, especially in pumping stations with large water level changes, the pumping stations often operate under low-efficiency conditions, resulting in a lot of waste of energy.
3. Some large flow centrifugal pumps cannot be tested in the laboratory for their performance.
In order to meet the water requirements and the purpose of economic operation, it is often necessary to change the flow and head to change the working point. The internal flow analysis of impeller machinery has always been a hot research issue. Due to the Coriolis force and centrifugal force caused by the rotation and surface curvature of the impeller, the flow in the impeller is quite complicated, and it is often accompanied by flow separation and wake flow. So far, no satisfactory centrifugal pumps have been designed using the ternary theory.
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