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مکانیک::
واماندگی دورانی
The stable operation of axial flow compressors as they are employed in modern jet engines and gas turbines is often limited by two flow breakdown processes known as surge and rotating stall.
Surge is a circumferentially uniform pulsation of the mass flow through the machine, while rotating stall appears as a reduced flow region in part of the circumference, which travels around the compressor annulus at a fraction of the rotor speed.
Theoretical and experimental investigations for the active control of rotating stall have been conducted at the NASA Glenn Research Center on a single-stage transonic core compressor inlet stage (Spakovszky et al.
The active stabilization of rotating stall and surge using unsteady air injection was first presented by Weigl et al
The concept of active tip-clearance control suggests a new application of magnetic bearings as servo actuators to stabilize rotating stall in axial compressors.
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