Compressor Control 방법중에서 Inlet Guide Vane이 구체적으로 어떤 원리로 작동하는 것인가요?
GPSA
The direction of the swirl is normally the same as the direction of
rotation of the impeller which results in a decrease in the head produced by the compressor stage.
The reduction in head produced gives guide vane control an efficiency advantage over inlet throttling.
Gas Conditioning and Processing says
"Adjustable inlet guide vanes essentially change the aerodynamic characteristics of the first impeller.
This is accomplished by pre-whirling the gas entering the wheel in the direction of rotation, thereby developing less head than design.
The efficiency declines as well but not as much as the head so the net result is lower driver power."
Impeller의 회전 방향으로 pre-rotation을 주면 왜 Head Reduction이 일어나는 것일까요?
Inlet Guide Vane이 Suction Throttle Valve 보다 Efficient한 이유는 무엇인가요?
