Investigation on flow mechanism of an advanced transonic centrifugal compressor with free-form impeller at design and off-design speeds

Li, Ziliang; Lu, Xingen; Han, Ge; Zhu, Jihong

doi:10.1080/19942060.2022.2111364

Cited by 4 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Centrifugal compressors, as the main components of electric pressure intensifiers, are characterized by small size, simple structure, and high boost ratio, and their main structures are the diffuser, impeller, and worm housing [8]. The design of the diffuser and impeller has an essential impact on the performance of the pressurizer, so the current research on the pressurizer is mainly reflected in the analysis and optimization of its implementation [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Design of Electric Supercharger Compressor and Its Performance Optimization

Wei

et al. 2023

Processes

View full text Add to dashboard Cite

The performance of the centrifugal compressor, which is the main component of the electric supercharger, significantly impacts the engine’s dynamics, economy, emissions, and responsiveness. The purpose of this paper is to enhance the aerodynamic performance of the centrifugal compressor of the electric supercharger for the two-stroke engine by optimizing the design of its impeller and diffuser parameters. The paper employs the numerical simulation method and applies the Spalart–Allmaras turbulence model to solve the RANS equations to analyze the impact of impeller-related parameters on the centrifugal compressor’s performance. Subsequently, the paper optimizes the initial model parameters based on the simulation results and confirms its performance through an experiment. The findings indicate that enhancing the isentropic efficiency and pressure ratio of the compressor can be achieved by increasing the number of blades on the impeller, selecting an appropriate blade backward angle, and increasing the relative outlet width. After optimization, the compressor’s efficiency can achieve 0.842, the pressure ratio can reach 1.49 with a working margin of 22%, and the efficiency is enhanced by 1.4%, while the pressure ratio is increased by 1.8% compared to the pre-optimization state. Moreover, the optimized model is experimentally validated to meet the design requirements.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of Electric Supercharger Compressor and Its Performance Optimization

Wei

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

Pore structure characteristics, modulation and its effect on concrete properties: A review

Xiao

Duan

et al. 2023

Construction and Building Materials

View full text Add to dashboard Cite

Quantitative analysis on influence of secondary flow for centrifugal impeller internal flow

Zhou

Cheng

et al. 2023

Physics of Fluids

View full text Add to dashboard Cite

A comprehensive quantitative analysis of a high-load transonic centrifugal compressor is performed under the design point. The reason for secondary flow within the impeller is examined under the approximation of boundary layer theory. Comparing the amplitudes of different terms of the Navier-Stokes (N-S) equations reveals that the acceleration that creates secondary flow within the shear layer is caused primarily by the Coriolis force difference. Migration flow on the wall surface further leads to the formation of three-dimensional secondary flow structures that occupy the entire blade passage. The wake is ultimately composed of high-loss fluid that includes migration flow from the hub to the tip on the blade suction surface, leakage flow, and recirculating flow at the impeller outlet. The pressure distribution within the blade passage is determined by the acceleration caused by the three-dimensional secondary flow structure, especially the momentum convection term. Vortices on the blade surface at the exducer cause the pressure on the blade surface to decrease from the hub to the tip. Also, the wake not only decreases its loading due to a lower local Coriolis force but also decreases the loading of the main flow due to its squeezing.

show abstract

Investigation on flow mechanism of an advanced transonic centrifugal compressor with free-form impeller at design and off-design speeds

Cited by 4 publications

References 29 publications

Design of Electric Supercharger Compressor and Its Performance Optimization

Design of Electric Supercharger Compressor and Its Performance Optimization

Pore structure characteristics, modulation and its effect on concrete properties: A review

Quantitative analysis on influence of secondary flow for centrifugal impeller internal flow

Contact Info

Product

Resources

About