نتایج جستجو برای: multistage compressor

تعداد نتایج: 15765  

2004
Nikola Stosic Ian K. Smith Ahmed Kovacevic

For many years the authors have been investigating the use of twin screw machines to fulfil both the expansion and compression. One of potential advantages of screw machines over other types of positive displacement machine is their ability to perform both the compression and expansion functions simultaneously, using only one pair of rotors. A further feature is the use of the rotors which seal...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2014
N Gourdain F Sicot F Duchaine L Gicquel

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...

Journal: :Journal of turbomachinery 2021

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...

Journal: :Energies 2023

An axial compressor has high efficiency under design conditions, but its stable working range is narrow. Adjusting the rotational speed can effectively expand range. In this paper, a five-stage for specific compressed air energy storage (CAES) system taken as research object, and different (DRS) characteristics are studied with NUMECA software. Firstly, influence of DRS on overall aerodynamic p...

The effect of the tip gap size on the performance of a multistage axial compressor was studied by means of computational fluid dynamics (CFD). It was found that the performance of the compressor was very sensitive to the size of the tip gap. By increasing the gap size, the stall margin value, the total pressure ratio and the compressor efficiency reduced considerably. The flow field at the tip ...

Journal: :Journal of Physics: Conference Series 2021

In this paper, the aeroelastic flutter stability of an impeller is investigated numerically with single passage and full annulus URANS simulations carried out on one side a stage configuration including strut other multistage in which two additional diffusers are considered downstream. The robustness relying use multiple frequency phase-lagged boundary conditions put to test especially case for...

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