Which type of pump has an impeller rotating in a channel of constant cross-sectional area, which imparts mixed or radial flow to the water?

Which type of pump has an impeller rotating in a channel of constant cross-sectional area, which imparts mixed or radial flow to the water?

• A. Axial-flow pump
• B. Mixed-flow pump
• C. Reciprocating pump
• D. Centrifugal pump

Answer: (B)

The mixed-flow pump is designed specifically to combine features of both axial-flow and centrifugal pumps, allowing it to impart a mixed or radial flow to the water. In this type of pump, the impeller rotates within a channel that maintains a constant cross-sectional area. This design enables the fluid to be accelerated both by centrifugal force and axial motion. The mixed-flow configuration allows it to handle higher flow rates than a pure axial-flow pump while offering better efficiency than a centrifugal pump at certain operating conditions. This versatility makes it suitable for various applications within water treatment processes, especially when a significant head and flow rate are required. In comparison, an axial-flow pump primarily generates flow in a straight line along the axis of the impeller, while a centrifugal pump relies entirely on radial flow to push water outward from the center of the impeller to the periphery. A reciprocating pump functions through the back-and-forth movement of a piston or diaphragm, leading to a volumetric flow rather than the continuous flow characteristic of mixed-flow pumps. These distinctions clarify why mixed-flow pumps are uniquely classified based on their impeller design and the flow they produce.

The mixed-flow pump is designed specifically to combine features of both axial-flow and centrifugal pumps, allowing it to impart a mixed or radial flow to the water. In this type of pump, the impeller rotates within a channel that maintains a constant cross-sectional area. This design enables the fluid to be accelerated both by centrifugal force and axial motion.

The mixed-flow configuration allows it to handle higher flow rates than a pure axial-flow pump while offering better efficiency than a centrifugal pump at certain operating conditions. This versatility makes it suitable for various applications within water treatment processes, especially when a significant head and flow rate are required.

In comparison, an axial-flow pump primarily generates flow in a straight line along the axis of the impeller, while a centrifugal pump relies entirely on radial flow to push water outward from the center of the impeller to the periphery. A reciprocating pump functions through the back-and-forth movement of a piston or diaphragm, leading to a volumetric flow rather than the continuous flow characteristic of mixed-flow pumps. These distinctions clarify why mixed-flow pumps are uniquely classified based on their impeller design and the flow they produce.