Effect of Vaned and Vaneless Diffuser on the Performance of Turbo Blowers

Abstract

The choice of diffuser type in centrifugal compressors and turbo blowers impacts efficiency. Vaned diffusers perform best at high flow rates but lose efficiency at lower flows due to their fixed design. Vaneless diffusers, without fixed blades, adapt better to varying flow rates and excel at part-load conditions. Therefore, vaned diffusers are ideal for applications with constant high flow rates, while vaneless diffusers offer efficiency advantages in variable flow rate applications. HAUS Centrifugal technology's XMP 122 Turbo blower will be employed in performance tests with both vaned and vaneless diffusers. The blower features an automatic variable geometry diffuser (VGD) system that optimizes flow efficiency. During testing, the blower operated within a speed range of 19,000 to 33,000 rpm. Analysis of the obtained data revealed a noticeable enhancement in volume flow rate.