Which type of propulsion turbine is most commonly used?

The most commonly used type of propulsion turbine is Type II-A. This turbine design is widely favored in naval applications due to its balance of performance, efficiency, and durability, making it suitable for various operational conditions. The Type II-A can efficiently convert thermal energy into mechanical energy, providing reliable propulsion for ships while also having the capability to adapt to varying power demands.

The design features of the Type II-A allow for effective heat exchange and enhanced steam conditions, leading to optimal performance. It supports high power outputs while maintaining good efficiency, which is critical for naval vessels that require both speed and maneuverability.

Other types of turbines, while they may have specific applications or advantages, do not match the widespread utility and adaptability of the Type II-A in naval propulsion systems. This is why it stands out as the most commonly used turbine type in this context.