Zur Kennlinienstabilität von Seitenkanalverdichtern About the stability of the characteristic curves of side channel compressors

In contrast to radial and axial turbocompressors side channel compressors have stable operation characteristics in the entire operation range. Up to now this attribute, which is advantageous for the operation of side channel compressors was just taken without questioning the reasons. For stable operation characteristics of turbomachiery in the widening of the characteristic field in the part-load region are aspired and demanded by many fields of application, in this document the reasons for this phenomenon in side channel compressors shall be investigated with the aim of using the responsible flow structures in other types of compressores too and of extending the safe operation range. The question has to be answered whether stage of side channel compressors are able to enforce a stable characteristic curve in a combined compressor unit when coupling with stages of other types of compressors. If side channel compressors are able to, extending the operation ranges of turbocompressors by side channelexhaust stages without surge are within reach.