What are the two common configurations of axial flow compressors?

What are the two common configurations of axial flow compressors?

• A. Single Rotor (solid-spool) and Dual Rotor (split-spool)
• B. Centrifugal and axial
• C. Tandem rotors and triple rotors
• D. Intermittent and continuous rotors

Answer: (A)

axial flow compressors come in two common configurations: a single-spool setup where all compressor stages are mounted on one shaft and therefore rotate at the same speed, and a dual-spool (split-spool) arrangement with two concentric shafts so the front low-pressure stages and the rear high-pressure stages can run at different optimal speeds. The single-spool design is simpler and lighter, but its stages are tied to one speed, which can limit performance across varying operating conditions. The dual-spool design allows each section to optimize its speed for efficiency and surge margin, improving overall performance, especially during transients, at the cost of added mechanical complexity. Some engines use three-spool designs, but the two most common are single-spool and dual-spool.

axial flow compressors come in two common configurations: a single-spool setup where all compressor stages are mounted on one shaft and therefore rotate at the same speed, and a dual-spool (split-spool) arrangement with two concentric shafts so the front low-pressure stages and the rear high-pressure stages can run at different optimal speeds. The single-spool design is simpler and lighter, but its stages are tied to one speed, which can limit performance across varying operating conditions. The dual-spool design allows each section to optimize its speed for efficiency and surge margin, improving overall performance, especially during transients, at the cost of added mechanical complexity. Some engines use three-spool designs, but the two most common are single-spool and dual-spool.