SELECTION OF TURBULENCE MODEL IN ANSYS CFX FOR INVESTIGATION OF TURBULENT NOISE AND VIBRATION OCCURRING IN INTERSCAPULAR SPACE OF THE CENTRIFUGAL TURBINE

The article is devoted to issues related to the occurrence of noise and vibration in the centrifugal turbine of ventilation equipment of residential buildings. Airflow in the rotating radial-axial channel representing a simplified configuration of the inter-blade channel of a centrifugal turbine is studied. Numerical simulation of the airflow in the considered geometrical domain is performed using ANSYS CFX solver. A particular attention is given to different turbulence closures used in the model. Accuracy of the simulation results was estimated with respect to the laboratory measurements by J. Moore [9]. The comparison was carried out for velocity profiles measured at three different cross-sections of the channel under different mass flow rates.