Characteristics of rotor blade tip clearance flow in axial compressors can significantly affect their performance and stable operation. It may also increase blade vibrations and cause detrimental noises. Therefore, this paper is contributed to investigate tip leakage flow in a low speed isolated axial compressor rotor blades row. Simulations are carried out on near-stall condition, which is val...

Robust design optimization involves finding the loworder statistical moments, i.e. the maximization of some mean quantity of interest and minimization of its variance. The question arises as to when a mean or variance value can be considered to be converged to an acceptable level of certainty. A designer naturally seeks to keep the number of function evaluations as low as possible when convergi...

The interaction between the Coriolis and mistuning effects on a finite-element model (FEM) of simplified bladed drum compressor has been investigated in this paper. Subset Nominal Modes (SNM), Component Mode Mistuning (CMM) Integral (IMM) techniques have chosen adapted to consider reduction matrix. Both free forced responses ROMs validated using FEM solutions as benchmark. A new analysis Monte ...

Turbochargers have evolved with the advancement of engine technology. In this study, we pro-posed a concept joint operation, based on operating characteristics compressor and turbine. Furthermore, turbine evaluation method was proposed concept, an optimization application study impeller blade number casing con-ducted verified. The results showed that performance point could predict trend more a...

Abstract Significant non-synchronous blade vibrations (NSVs) have been observed in an experimental three-stage high-speed compressor at part-speed conditions. High-amplitude acoustic modes, propagating around the circumference and originating highly loaded stage-3, coherence with structural vibration mode. In order to understand occurring phenomena, a detailed numerical study has carried out re...

Degradation of compressors is a common concern for operators gas turbine engines (GTEs). Surface roughness, due to erosion or fouling, considered one the major factors degradation phenomenon in that can negatively affect designed pressure rise, efficiency, and, therefore, engine aero/thermodynamic performance. The understanding aerodynamic implications varying blade surface roughness plays sign...