Which types of centrifugal compressor impellers are used in turbine engines?

Centrifugal compressor impellers in turbine engines are primarily designed to augment airflow efficiently while managing the engine's weight and size. The correct choice emphasizes the use of both single entry and dual entry impellers.

Single entry impellers allow air to enter a single opening and are relatively simple in design. They are effective for applications where space and weight are critical factors, such as in smaller or less complex engines. Dual entry impellers, on the other hand, allow air to enter from two different sides, effectively doubling the airflow capacity without significantly increasing the size of the impeller. This design enhances performance by improving airflow efficiency, contributing to higher pressure ratios within the compressor, which is essential for the overall efficiency and performance of turbine engines.

The selection of impeller type is vital in turbine engine design because it influences the compressor's ability to achieve desired pressure and temperature conditions while maintaining optimal performance across a range of operating conditions. This choice is also a balancing act between power output, fuel efficiency, and engine size.

Understanding these configurations is crucial not only for the design of efficient turbine engines but also for maintenance and troubleshooting purposes, making this knowledge essential for anyone involved in the operation or design of turbine engines.