What design is the turbine section in a single-stage setup?

• A. Axial flow design
• B. Radial flow design
• C. Centrifugal flow design
• D. Mixed flow design

Answer: (B)

The correct response highlights the nature of a single-stage turbine section, which typically has a radial flow design. In a radial flow turbine, the working fluid enters the turbine at the axis and flows outward in a radial direction through the blades. This design allows for efficient conversion of pressure energy into mechanical energy, making it suitable for applications where compactness and simplicity are desired.

The radial flow design is particularly advantageous in single-stage turbines as it minimizes complexity while maximizing the effective use of the kinetic energy of the gas or fluid being processed. As fluid enters, it is directed outward by the rotating blades, applying a force to the blades which, in turn, generates power. The geometry of the blades is optimized to facilitate this efficient flow pattern, ensuring that the turbine can operate effectively within the specified performance range.

In contrast, to understand why other options might not align with single-stage turbine design, consider that axial flow designs, while commonly found in multi-stage or larger turbines, do not conform to the single-stage criteria as they involve a longer path for the fluid along the axis of the turbine. Centrifugal flow designs, while relevant in certain centrifugal compressors and pumps, typically describe different use cases that are not singular in stage operation. Mixed flow designs incorporate elements of