Improvement in the stability of a turbocharger centrifugal compressor by tip leakage control

Mirzaee, Saeed; Zheng, Xinqian; Lin, Yun

doi:10.1177/0954407016656543

Cited by 12 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this purpose, the simulation results should be compared with the experimental results. As the current work is done and simulated by the same CFD software EURANUS (NUMECA), the same turbulence model (S-A) and the same boundary conditions as the work done by Mirzaee et al [33], the validation reported in their research work is used for validating the numerical simulation in this study. They compared the overall performance of the CFD results and experimental results.…”

Section: Validation With Experimental Datamentioning

confidence: 99%

Effects of Radial Gap Ratio between Impeller and Vaned Diffuser on Performance of Centrifugal Compressors

Hosseini

Sun

et al. 2017

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Abstract:A high-performance centrifugal compressor is needed for numerous industry applications nowadays. The radial gap ratio between the impeller and the diffuser vanes plays an important role in the improvement of the compressor performance. In this paper, the effects of the radial gap ratio on a high-pressure ratio centrifugal compressor are investigated using numerical simulations. The performance and the flow field are compared for six different radial gap ratios and five rotational speeds. The minimal radial gap ratio was 1.04 and the maximal was 1.14. Results showed that reducing the radial gap ratio decreases the choke mass flow rate. For the tip-speed Mach number (impeller inlet) with M u < 1, the pressure recovery and the loss coefficients are not sensitive to the radial gap ratio. However, for M u ≥ 1, the best radial gap ratio is 1.08 for the pressure recovery and the loss coefficients. Furthermore, the impeller pressure ratio and efficiency are reduced by increasing the radial gap ratio. Finally, the compressor efficiency was compared for different radial gap ratios. For M u < 1, the radial gap ratio does not have noticeable effects. In comparison, the radial gap ratio of 1.08 has the best performance for M u ≥ 1.

show abstract

Section: Validation With Experimental Datamentioning

confidence: 99%

Effects of Radial Gap Ratio between Impeller and Vaned Diffuser on Performance of Centrifugal Compressors

Hosseini

Sun

et al. 2017

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…This study demonstrated the advantage of the suction flow control method by showing both surge margin and pressure ratio improvements. Mirzaee et al [14] studied air injection method on a centrifugal compressor to increase stability. They examined different injection parameters ahead of the leading edge of the impeller and reported that this method was able to reduce the leakage flow from the propeller.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Suction Flow Control on Centrifugal Compressor with Vaned Diffuser

Çadırcı

2022

Energies

View full text Add to dashboard Cite

In this study, the effect of suction flow control on a centrifugal compressor at operation and stall flow rates was investigated using computational fluid dynamics (CFD). The compressor geometry was reconstructed from available open source profile data and the CFD analyses have been performed on this geometry using the appropriate mesh. To validate the CFD results, the compressor performance line was acquired and compared with the experimental results obtained at the design rotational speed. Then, suction flow control was employed at various suction slot positions with different suction flow rates to improve the performance of the compressor at operation and stall flow rates. As a result of the suction flow control trials, 0.85% increase in pressure ratio and 0.8% increase in adiabatic efficiency were achieved while the compressor was running at operation flow rate. The performance improvements corresponding to the stall flow rate of the compressor were 2.5% increase in pressure ratio and 2% increase in adiabatic efficiency.

show abstract

“…The tip clearance leakage flow (TLF) is associated with the compressor pressure ratio, 20,21 efficiency, 22,23 and stability. [24][25][26] Therefore, the circumferential difference of the TLF has attracted widespread attention. The angle a between the tip clearance leakage vortex trajectory and the axial direction is used to measure the degree of circumferential deflection of the TLF.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism of static pressure circumferential double-peak distribution in a centrifugal compressor under the action of downstream boundary

Yang

Zhang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

In the centrifugal compressor applied in the automobile turbochargers, the asymmetric structure of volute causes the non-uniform flow field in the impeller and compressor stall. The non-uniformity of the flow field in the compressor can be reflected by the casing-wall static pressure distribution. In this study, by removing the volute and directly imposing different simplified static pressure boundary conditions at the diffuser outlet, the formation mechanism of casing-wall static pressure circumferential double-peak distribution of the compressor is explored. It is found that the mass flow rate is redistributed at the impeller outlet due to local high static pressure induced by the volute tongue, which results in the formation of two airflow regions with high velocity in the diffuser, ultimately leading to the static pressure circumferential double-peak distribution in the diffuser and the impeller. Noted that because of the existence of the blades, the airflow regions with high and low velocity formed in the diffuser are locked within a limited range of one or more widths of the blade passage. When the number of blades in the compressor is large, the static pressure can appear as multi-peak distribution in the circumferential direction. Moreover, the result of the mass flow rate redistribution at the impeller outlet is determined by the static pressure distribution characteristics at the diffuser outlet.

show abstract

Improvement in the stability of a turbocharger centrifugal compressor by tip leakage control

Cited by 12 publications

References 23 publications

Effects of Radial Gap Ratio between Impeller and Vaned Diffuser on Performance of Centrifugal Compressors

Effects of Radial Gap Ratio between Impeller and Vaned Diffuser on Performance of Centrifugal Compressors

Investigation of Suction Flow Control on Centrifugal Compressor with Vaned Diffuser

Formation mechanism of static pressure circumferential double-peak distribution in a centrifugal compressor under the action of downstream boundary

Contact Info

Product

Resources

About