Effect of axial position of wire mesh casing treatment on the stability of compressor

This study investigates the impact of the axial position of wire mesh casing treatment (WMCT) on compressor stall margin and precursor behavior through experimental and computational analyses. Experimental results demonstrate that shifting the WMCT from the blade tip leading edge toward the trailing edge first enhances the stall margin before it declines, with the most significant improvement occurring at a 35 mm distance. At 25 mm, however, efficiency loss is highest due to intensified flow mixing. Numerical simulations highlight WMCT's influence on tip leakage flow, where placement near the leading edge reduces initial vortex intensity, enhancing stability. When positioned downstream, it disrupts vortex development and forms a secondary leakage structure, delaying the upstream migration of the mainstream-leakage interface, thereby improving stall margin. Furthermore, dynamic experimental results indicate that WMCT positioning affects both stall margin and precursor characteristics.