Question

When compared with centrifugal compressor, the isentropic efficiency of axial flow compressor is

• A. equal
• B. more
• C. less
• D. cannot be compared

Hint:

Axial compressors are more efficient but complex compared to centrifugal types.

Answer 1

The Correct Option is B

In evaluating compressor efficiencies, particularly between centrifugal and axial flow compressors, the isentropic efficiency is a critical parameter. The isentropic efficiency of an axial flow compressor is generally higher when compared to that of a centrifugal compressor. This is because axial flow compressors are capable of maintaining higher efficiencies over a broader range of operating conditions and can handle higher mass flow rates with relatively smaller frontal areas, which contributes to their effectiveness in high-speed applications commonly seen in aerospace engineering.

In terms of design and operation, axial flow compressors are structured to minimize energy losses associated with compressing air, largely due to their continuous air flow pattern along the axis of rotation. This allows for a more streamlined process of converting mechanical energy into pressure energy with fewer disturbances, increasing the overall efficiency.

Therefore, when comparing the isentropic efficiencies: the isentropic efficiency of an axial flow compressor is more than that of a centrifugal compressor, making it advantageous for applications requiring high efficiency and performance.