Which statement about the inducer bleed port is true?

Which statement about the inducer bleed port is true?

• A. It prevents compressor surge at low N1 RPM
• B. It increases engine RPM
• C. It has no effect on compressor surge
• D. It only works at high N1 RPM

Answer: (A)

Inducer bleed port helps keep the compressor stable when it’s turning slowly, by bleeding a small amount of air from the inducer stage. This reduces the pressure rise across the inducer, which prevents flow reversal and surge as the engine is at low N1. In other words, its purpose is to suppress compressor surge during low-speed operation or throttle changes, not to boost RPM. It isn’t limited to high RPM and it does affect surge behavior.

Inducer bleed port helps keep the compressor stable when it’s turning slowly, by bleeding a small amount of air from the inducer stage. This reduces the pressure rise across the inducer, which prevents flow reversal and surge as the engine is at low N1. In other words, its purpose is to suppress compressor surge during low-speed operation or throttle changes, not to boost RPM. It isn’t limited to high RPM and it does affect surge behavior.