In this paper, the effect of an active flow control system on onset mechanisms rotating stall in axial compressor is experimentally investigated. A particular emphasis thus given patterns present tip region right before and how they evolve when applied. The involved during formation without are carefully assessed compared to literature. To purpose, development first instability into discussed b...

This thesis presents a simple, meanline analysis of the impact of blade roughness on the mass flow, work coefficient, and efficiency of a three-stage axial compressor as a function of the location of fouling. First, an extensive review is presented on the state-ofthe-art of measuring compressor degradation and on the impact of roughness on loss and deviation in a compressor cascade. The perform...

Design optimization of transonic airfoils for rotary blades is a challenging subject that remarkably affects the stage and overall performance axial-flow compressors. This paper describes surrogate-based multi-objective process over blade. blade works in first high-pressure pre-designed industrial axial compressor. It experiences massive separation behind an impinging shock wave its suction sid...

exergy analysis of a system is a method for recognizing the value and type of system availability against surrounding environment. it also helps to find how macroscopic properties of the system change during a process. this analysis is based on first and second laws of thermodynamics. by exergy analysis proportion of each process in the internal availability transmission and the places of usefu...

an optimal design and fabrication of compressors requires flow investigation through the compressor components. flow field inside the volute is fully three dimensional and turbulent. better understanding of flow mechanism leads to improve the volute design procedure. in this research the experimental and numerical flow investigation through a radial flow compressor volute are performed to recog...

A better understanding of turbulent unsteady flows is a necessary step towards a breakthrough in the design of modern compressors. Owing to high Reynolds numbers and very complex geometry, the flow that develops in such industrial machines is extremely hard to predict. At this time, the most popular method to simulate these flows is still based on a Reynolds-averaged Navier-Stokes approach. How...

Improving the efficiency of compressors has been one of the most important goals of researchers over the years. In this paper, three different methods are presented for parameterization and blade optimization of axial flow compressor. All methods consist of flow analysis tool, optimization algorithms, and parametric geometry generation tool, that are different in each approach. Objective functi...