A 1D mean line model for centrifugal compressors with variable inlet guide vanes

Abstract

This paper considers a 1D in‐line analytical model for centrifugal compressors with variable inlet guide vanes. A theoretical 1D model is developed to predict the effect of varying the inlet guide vane angle at different rotational speeds. An iterative algorithm is presented, which provides a fast and efficient method for evaluating the performance of the compressor under different operating conditions. The results from the analytical 1D model are presented and compared to full 3D CFD (computational fluid dynamics) simulations. The simulations validate the assumptions used in the 1D model and show good agreement between the two approaches over a range of vane angles. Qualitatively, both demonstrate the same trends as the vane angle and rotational velocities are varied. Quantitatively, the pressure ratio was found to agree within 8% and the temperature gain to within 15%. The 1D model was then modified to introduce a 5% loss in the diffuser and this was found to improve the 1D model predictions, with the pressure within 2% of the CFD value.

Analysis of the Influence of Inlet Guide Vanes on the Performance of Shaft Tubular Pumps

“…erefore, the study of IGVs has great reference significance for engineering practice. In addition to its application in water pumps, IGVs are also widely used in compressors, gas turbines, and other applications [6][7][8][9][10][11][12].…”

Experimental determination of IGV preswirl effect on impeller blade vibration in an unshrouded centrifugal compressor

“…During the design phase, the efficient 1D model is needed before detailed numerical simulation to evaluate the IGV preswirl effect on the performance of the compressor. Dewar et al 18 used proposed 1D model and iterative algorithm to capture the trends over a range of vane angles and rotational velocities. Results demonstrated the analytic method provides a simple and fast approach with reasonable accuracy.…”