Isotropy of the turbulent vorticity flow in side channel compressors

The impeller with a high number of blades causes a turbulent vorticity flow in the side channel, which is the reason for the specific impuls flow and the energy transfer in the side channel. High frequency pressure oscillations were caused according to the changes of the vorticity structure in the side channel. The dissipation loses are the reason for the heat up of the gas during the compression. According to the transported gas mass flow the turbulent vorticity flow is superposed from the average flow velocity of the gas. They depend from the peripheral speed of the impeller and the size of the compressor. The superposition of the turbulent vorticity flow and the average flow velocity cause the question of the isotrope of the turbulent vorticity flow in the side channel for the working area of the compressor. Experimental results from side channel compressors will give an answer to this.