Aerodynamic and Aeroacoustic Analyses of a Regenerative Blower

Abstract

This paper presents a parametric study to investigate the aerodynamic and aeroacoustic characteristics of a side channel regenerative blower. Flow analysis in the side channel blower was carried out by solving three-dimensional steady and unsteady Reynolds-averaged Navier-Stokes equations with the shear stress transport turbulence closure. Aeroacoustic analysis was conducted by solving the variational formulation of Lighthill’s analogy on the basis of the aerodynamic sources extracted from the unsteady flow analysis. The height and width of the blade and the angle between inlet and outlet ports were selected as three geometric parameters, and their effects on the aerodynamic and aeroacoustic performances of the blower have been investigated. The results showed that the aerodynamic and aeroacoustic performances were enhanced by decreasing height and width of blade. It was found that angle between inlet and outlet ports significantly influences the aerodynamic and aeroacoustic performances of the blower due to the stripper leakage flow.

Effect of incidence angle on cavity blockage and flow stability in the net positive suction head drop of mixed-flow pumps

“…31,32 The root means square (RMS) residuals of the governing equations and imbalances of mass and momentum were kept below 1.0 Â 10 À5 and 1.0 Â 10 À3 , respectively, to obtain reasonable results. 33,34 The convergence for the second phase was judged with the above RMS residuals as the entire criterion, and another RMS residuals for the water volume fraction were additionally considered with a repeated pattern in the range from 1.0 � 10 �5 to 1.0 � 10 �6 . Detailed boundary conditions are listed in Table 2.…”