Design optimization of a centrifugal compressor vaneless diffuser

Shaaban, S.

doi:10.1016/j.ijrefrig.2015.06.020

Cited by 14 publications

(6 citation statements)

References 24 publications

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“…Dong et al 20 carried out the numerical simulation to the impeller, and the results showed that the maximum velocity of the flow is located at the edge of the impeller outlet, and the maximum pressure is near the diffuser and volute outlet. Shaaban 21 optimized the structure of diffuser of centrifugal compressor by genetic algorithm. Under the condition of jet-wake and swirl, the loss coefficient of diffuser was reduced by 4.7%, and the pressure coefficient was increased by 6.6%.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Liang

Xiang

Wei

et al. 2021

Advances in Mechanical Engineering

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The distribution and characteristics of internal flow field of the impeller with crack damage in service environment was investigated via numerical simulation with RNG k-ε turbulence model. The diffuser and volute are added based on the original impeller to simulate the internal flow field comprehensively. It was found that along the flow direction, the pressure, velocity, and temperature of the fluid increase continuously, and the maximum value appears near the outlet of the impeller. The maximum pressure and velocity in the crack area are distributed around the middle section and the trailing edge of the crack. Entropy production theory was applied in the study of internal flow, which reveals that the entropy production becomes larger around the crack. The further propagation of the crack is promoted by the opening force perpendicular to the entrance direction of the middle crack, the corrosion propagation at the rear edge of the crack, and the thermal deformation of the blade. The accelerated crack process will finally lead to the blade fracture accident.

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Section: Introductionmentioning

confidence: 99%

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Liang

Xiang

Wei

et al. 2021

Advances in Mechanical Engineering

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“…Radial vaneless diffuser is a principal component in these compressors. Therefore, Shaaban [21] in his article aims at improving the centrifugal compressor performance by optimizing the design of the radial vaneless diffuser. Two radial vaneless diffuser geometries were proposed, investigated and numerically optimized.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Optimization of the Performances of the Centrifugal Compressor Using the CFD

Mostefa¹,

Refassi²,

Embarek³

et al. 2021

IJHT

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Centrifugal compressors have been used in many areas of the machinery. The centrifugal compressor design is very complex, and a unique design system needs to be developed. A centrifugal compressor design system should be easy to use in interface and also flexible for inputs and outputs. The design tool also needs to be able to predicate the compressor performance in a fairly accurate level. In this study, we have developed a general analyses and optimization approach in the design and performance analysis of centrifugal turbomachines. This approach is based on different methods starting from a 1D approach up to the 3D study of the internal flow. It presents itself as a robust procedure for predicting and understanding the phenomena associated with the operation of turbomachines, but also for predicting performance. Current design system includes initial parameter studies, throughflow calculation, impeller design. The main improvements of the design system are adding the interface to allow users easy to use, adding the input and output capabilities and modifying few correlations. Current design system can predict the blade loading and compressor performance better compared with original design system. To check the aerodynamic appearance of the centrifugal compressor impeller blades, we must change the impeller dimensions and focus on changing axial length, but when changing the blade numbers, the model that improved efficiency and power at the same time introduced a design with a 0.274% and 10.735% improvement in each respectively in comparison to the initial impeller at the design point.

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“…Many parameters are considered in this regard. For example optimization techniques were implemented to optimize the blade profile [6], meridional profiles [7,8], blade sweep angle [9], the splitter [10], the vaneless diffuser [11] and there are many others.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Centrifugal Compressor Using the Design of Experiment Technique

Mojaddam

Pullen

2019

Applied Sciences

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Centrifugal compressor performance is affected by many parameters, optimization of which can lead to superior designs. Recognizing the most important parameters affecting performance helps to reduce the optimization process cost. Of the compressor components, the impeller plays the most important role in compressor performance, hence the design parameters affecting this component were considered. A turbocharger centrifugal compressor with vaneless diffuser was studied and the parameters investigated included meridional geometry, rotor blade angle distribution and start location of the main blades and splitters. The diffuser shape was captured as part of the meridional geometry. Applying a novel approach to the problem, full factorial analysis was used to investigate the most effective parameters. The Response Surface Method was then implemented to construct the surrogate models and to recognize the best points over a design space created as based on the Box-Behnken methodology. The results highlighted the factors that affected impeller performance the most. Using the Design of Experiment technique, the model which optimized both efficiency and pressure ratio simultaneously delivered a design with 3% and 11% improvement in each respectively in comparison to the initial impeller at the design point. Importantly, this was not at the expense of sacrificing range, of critical concern in compressor design.

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Design optimization of a centrifugal compressor vaneless diffuser

Cited by 14 publications

References 24 publications

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Analysis and Optimization of the Performances of the Centrifugal Compressor Using the CFD

Optimization of a Centrifugal Compressor Using the Design of Experiment Technique

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