Rotor wheels and blades are referred to as what?

Rotor wheels and blades are referred to as what?

• A. Stages
• B. Rotors
• C. Impellers
• D. Runners

Answer: (A)

In turbomachinery, a stage is the basic repeating unit that includes the rotor with its blades and the following stationary blades. The rotor wheels and their blades form the moving half of that stage, and the stage name emphasizes this one complete flow passage through that set of blades. So rotor wheels and blades are referred to as a stage because it represents one complete, repeating section of the machine’s flow path. The other terms describe different things: a rotor or impeller refers to the rotating element alone, and a runner is used in other contexts like pumps or different machine types.

In turbomachinery, a stage is the basic repeating unit that includes the rotor with its blades and the following stationary blades. The rotor wheels and their blades form the moving half of that stage, and the stage name emphasizes this one complete flow passage through that set of blades. So rotor wheels and blades are referred to as a stage because it represents one complete, repeating section of the machine’s flow path. The other terms describe different things: a rotor or impeller refers to the rotating element alone, and a runner is used in other contexts like pumps or different machine types.