失速起始检测的平均数值差分方法

为在压气机整机进入深度失速前检测到失速起始信号,提出了一种基于平均数值差分的短周期扰动检测方法。应用该方法对某轴流式压气机压力测量数据进行了分析。结果表明,平均数值差分方法可准确地在该压气机深度失速前0.02～0.05s检测到失速起始信号,具有一定的工程应用价值。 

An Averaged Numerical Difference Method for Detection of Stall Inception

To detect stall inception signal before the whole compressor running into deep rotating stall,a method based on averaged numerical difference is developed to detect short length scale disturbance.While the method is used to analyze measured pressure data of certain axial flow compressor, corresponding analysis results demonstrate that the method can detect stall inception signal of the compressor 0.02～0.05 second before the start of deep rotating stall,and that the method has certain engineering application value.