A computational and experimental study was carried out to determine whether blade tip suction can increase compressor efficiency. Compressor flow fields contain concentrated regions of high entropy fluid near the blade surfaces. Blade suction can remove this fluid, lowering the entropy of the compressor throughflow, thereby avoiding a thermodynamic inefficiency, ultimately raising the compresso...

Numerical simulations have been performed to study the effect of circumferential single-grooved casing treatment (CT) at multiple locations on tip-flow stability and corresponding control mechanism three tip-clearance-size (TCS) schemes in a transonic axial flow compressor rotor. The results show that CT is more efficient when its groove located from 10% 40% tip chord, G2 (located near 20% chor...

We report the design, fabrication, and testing results of a micro magnetic stir-bar monolithically integrated in Parylene surface-micromachined channels with small tip-tochannel clearance. We demonstrated two applications of such stir bars: mixing and pumping.

The tip-clearance size of compressor rotors has a big effect on both performance and off-design conditions. Increasing the value tip gap can lead to reduction in efficiency surge margin about 1 %. Mechanical constraints impose minimal clearance order for operate while further would generally be beneficial aerodynamically. However, sensitivity show more complex tendencies. For example, some stud...

Abstract The reduction of tip clearance height the compressor has an important influence on improvement efficiency. goal control technology is to reduce height. Firstly, phase change principle materials analyzed. Under temperature excitation, when material in solid-liquid two-phase region, volume will with temperature. A mechanism for was developed, and scheme designed. Finally, feasibility gap...