THE TIME-ACCURATE NUMERICAL SIMULATION OF A CENTRIFUGAL COMPRESSOR

摘要

A fully 3-D, viscous, turbulent, time-accurate numerical simulation was carried out for a centrifugal compressor. The computational domain consisted of the entire compressor including the inlet pipe, inlet cone, full impeller, diffuser, volute, exit cone and exit pipe. A design operation point of the compressor was modelled. Turbulence is modelled with the low Reynolds number k-ε turbulence model. The time-accurate and quasi-steady computational results were compared with each other and with the experimental data. Computed isentropic total-total efficiency, pressure ratio and overall performance of the volute were compared with the measured data. Also the computed circumferential variations of the total and static pressure were shown and compared with the measured data. The variations of the mass flow and pressure in relation to time were shown.