Table of Contents
How can compressor stall be avoided?
Variable-pitch stators (to control flow angles), compressor bleeds, casing treatments, and tip clearance controls all are used to avoid stall conditions.
Can a centrifugal compressor stall?
Indeed, centrifugal compressors sometimes operate with stall: near inducer tips or over the impeller due to downstream asymmetry. But they could remain stable even with stall present, and surge is less likely to occur.
What is stall margin?
As it pertains to gas turbine engines, it is the parameter that is the difference between the operating RPM and the RPM at which the compressor blades will stall at any altitude and for transient slam acceleration.
Is compressor surge the same as stall?
A compressor stall is a local disruption of the airflow in the compressor of a gas turbine or turbocharger. A stall that results in the complete disruption of the airflow through the compressor is referred to as a compressor surge.
What is rotation stall?
Rotating stall is a local disruption of airflow within the compressor which continues to provide compressed air, but with reduced effectiveness. Rotating stall arises when a small proportion of airfoils experience airfoil stall, disrupting the local airflow without destabilising the compressor.
What is compressor choke?
Choking is the condition which occurs in the compressor in which it operates at very high mass flow rate and flow through the compressor can’t be further increased as mach number at some part of the compressor reach to unity i.e. to sonic velocity and the flow is said to be choked.
What is Turbo stall?
From Wikipedia, the free encyclopedia. A compressor stall is a local disruption of the airflow in the compressor of a gas turbine or turbocharger. A stall that results in the complete disruption of the airflow through the compressor is referred to as a compressor surge.
What is surge line in compressor?
Surge is defined as the operating point at which centrifugal compressor peak head capability and minimum flow limits are reached. A collection of surge points during varying compressor speed or varying inlet gas angle is fitted as surge line.