Question

In a multistage axial flow compressor, the axial velocity at higher stage

• A. remains same
• B. high
• C. small
• D. unstable

Hint:

Constant axial velocity ensures stage matching and performance predictability.

Answer 1

The Correct Option is A

In the context of a multistage axial flow compressor, understanding how axial velocity behaves across different stages is crucial. Each stage of the compressor is designed to compress the air further, but certain parameters are maintained to ensure efficiency and stability. The axial velocity is one such parameter. Here's why it remains the same:

The axial velocity is kept constant across various stages due to the principle of optimal design of compressors. This consistency is essential for several reasons:

• Efficiency: Maintaining a constant axial velocity helps minimize losses and maximize aerodynamic efficiency. It ensures that the airflow smoothly transitions from one stage to the next.
• Design simplicity: Having a constant axial velocity simplifies the blade design and reduces the complexity involved in the flow path design.
• Stability: Maintaining a stable flow regime is vital for preventing fluctuations and instabilities in the compressor's operation.

Therefore, in a well-designed multistage axial flow compressor, the axial velocity typically remains the same across the higher stages to ensure optimal performance and reliability.