Centrifugal Compressor Performance Improvement through Multi Splitter Impeller

Malik, Afia; Zheng, Qun; Qureshi, Shafiq R.; Ahmed, Salman Abdu; Gambo, D. Kb

doi:10.2478/pomr-2019-0020

Cited by 2 publications

References 18 publications

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Design of a high-performance centrifugal compressor impeller and an investigation on the linear effects of the hub

et al. 2022

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The performance of the turbocharger can be improved by optimizing the structural parameters of the compressor impeller. In this work, the existing centrifugal compressor impeller was taken as the case study, and the line shape of the hub was modified in order to study the influence of the line curvature of the hub on the compressor performance. Furthermore, the Navier–Strokes flow equation and the fourth-order Runge–Kutta method were used with Numeca software in order to solve the steady-state RANS equation, and the RANS equation is the averaging of unsteady N-S equations on time to solve the engineeringly required averaging. The numerical simulations and the performance predictions were made for each case, and then, the experiments were carried out to verify the accuracy of the aerodynamic performance that was obtained from the numerical simulations. The research results showed that within the design value range, the curvature of the impeller hub profile increased when the flow range and surge margin of the compressor impeller increased. Moreover, the pressure ratio, efficiency, and post-compression temperature increased when the relative Mach number at the inlet of the impeller decreased, the shock wave intensity that was generated by the gas in the flow channel decreased, and the velocity loss decreased. The obtained influence of the compressor impeller hub linearity on the compressor performance provides an opportunity to further improve the performance of the centrifugal compressor.

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Design of a high-performance centrifugal compressor impeller and an investigation on the linear effects of the hub

et al. 2022

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Optimization of Centrifugal Compressor Splitter Blades Design Based on Regression Kriging Algorithm

Wang

et al. 2022

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Centrifugal compressors are widely used in ships, automobiles, aerospace and other fields. At present, the centrifugal compressor is usually designed with splitter blades to achieve a high pressure ratio and avoid airflow blockage at the leading edge throat of the main blade. This paper offers a multivariable optimization method for splitter blades design of centrifugal compressor. The length and circumferential position of the splitter blades are coupled to optimize the isentropic efficiency by using the Latin hypercube sampling, Regression Kriging algorithm and genetic algorithm. After optimization, the results show that the length of the splitter blades is shorter and its position is inclined to the pressure surface of the main blades. The maximum isentropic efficiency increased by 0.62%, the flow rate of the impeller surge point increased by 1.78%, and the flow rate of the plug point increased by 1.74%. After optimization, the low-speed zone of the flow field in the impeller decreases and the internal passages become more smooth. Besides, the degree of airflow obstruction is reduced, and the overall efficiency of the impeller is improved. The multivariable optimization method which is based on the Regression Kriging algorithm has certain universality and can provide important reference for the splitter blades design of centrifugal compressors and other turbomachinery.

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Centrifugal Compressor Performance Improvement through Multi Splitter Impeller

Cited by 2 publications

References 18 publications

Design of a high-performance centrifugal compressor impeller and an investigation on the linear effects of the hub

Design of a high-performance centrifugal compressor impeller and an investigation on the linear effects of the hub

Optimization of Centrifugal Compressor Splitter Blades Design Based on Regression Kriging Algorithm

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