Limits of Rotating Stall and Stall in Vaneless Diffuser of Centrifugal Compressors

Senoo, Yasutoshi; Kinoshita, Yoshifumi

doi:10.1115/78-gt-19

Cited by 54 publications

(57 citation statements)

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“…In other words, with a decrease in the inlet circumferential flow angle, the flow in the vaneless diffuser tends to instability, which well agrees with Senoo and Kinoshita (1978). Correspondingly, the inflow circumferential velocity angle when the rotating stall occurs is taken as the critical inflow angle α c .…”

Section: Influence Of Diffuser Inlet Velocity Of the Base Flow On Thesupporting

confidence: 52%

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A numerical approach to predict the rotating stall in the vaneless diffuser of a centrifugal compressor using eigenvalue method

Liu

Zhu

et al. 2017

jtam

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A two-dimensional incompressible flow model is presented to study the occurrence of rotating stall in vaneless diffusers of centrifugal compressors. The diffuser considered has two parallel walls, and the undisturbed flow is assumed to be circumferentially uniform, isentropic, and to have no axial velocity. The linearized 2D Euler equations for an incompressible flow in a fixed frame of the coordinate system are considered. After discretization by a spectral collocation method based on Chebyshev-Gauss-Lobatto points, the generalized eigenvalue problem is solved through the QZ algorithm. The compressor stability is judged by the imaginary part of the eigenvalue obtained. Based on the 2D stability analysis, the influence of inflow angle, radius ratio and wave number are studied. The results from the present stability analysis are compared with some experimental measurement and Shen's model. It is showed that diffuser instability increases rapidly and the stall rotational speed decreases quickly with an increase in the diffuser radius ratio. The largest critical inflow angle can be obtained when the wave number is around 3 ∼ 5 for the radius ratio between 1.5 to 2.2. It is also verified that the stability model proposed in this paper agrees well with experimental data and has the capability to predict the onset of rotating stall, especially for wide diffusers.

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Section: Influence Of Diffuser Inlet Velocity Of the Base Flow On Thesupporting

confidence: 52%

“…While in Senoo's vaneless diffuser model, the flow was no longer assumed to be symmetric and a non-uniform distribution of inlet velocity along the axial direction was taken into account. In his calculations, the critical velocity angle was defined for which reverse flow started in the vaneless diffuser (Senoo and Kinoshita, 1978).…”

Section: Introductionmentioning

confidence: 99%

A numerical approach to predict the rotating stall in the vaneless diffuser of a centrifugal compressor using eigenvalue method

Liu

Zhu

et al. 2017

jtam

View full text Add to dashboard Cite

show abstract

“…However, the performance curve corresponding to point 6 ( Fig. 4(a) of [3]) and point 9 ( Fig. 7 of [3]) also show a kink in the pressure rise curve at critical flow.…”

Section: Discussionmentioning

confidence: 99%

Discussion: “Rotating Stall Induced in Vaneless Diffusers of Very Low Specific Speed Centrifugal Blowers” (Kinoshita, Y., and Senoo, Y., 1985, ASME J. Eng. Gas Turbines Power, 107, pp. 514–519)

Braembussche

1985

Journal of Engineering for Gas Turbines and Power

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“…On the basis of comparison with experimental data, Senoo and Kinoshita (1978) claim that the vaneless diffuser rotating stall will occur when the diffuser inlet flow angle is 0.88 times the previous identified critical angle. Some discrepancies between the predicted and measured critical angles are present.…”

Section: Introductionmentioning

confidence: 99%

Rotating Stall in Centrifugal Compressor Vaneless Diffuser: Experimental Analysis of Geometrical Parameters Influence on Phenomenon Evolution

Ferrara

Ferrari

Baldassarre³

2004

International Journal of Rotating Machinery

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The rotating stall is a key problem for achieving a good working range of a centrifugal compressor and a detailed understanding of the phenomenon is very important to anticipate and avoid it. Many experimental tests have been planned by the authors to investigate the influence on stall behavior of different geometrical configurations. A stage with a backward channel upstream, a 2-D impeller with a vaneless diffuser and a constant cross-section volute downstream, constitute the basic configuration. Several diffuser types with different widths, pinch shapes, and diffusion ratios were tested. The stage was instrumented with many fast response dynamic pressure sensors so as to characterize inception and evolution of the rotating stall. This kind of analysis was carried out both in time and in frequency domains. The methodology used and the results on phenomenon evolution will be presented and discussed in this article.

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Limits of Rotating Stall and Stall in Vaneless Diffuser of Centrifugal Compressors

Cited by 54 publications

References 0 publications

A numerical approach to predict the rotating stall in the vaneless diffuser of a centrifugal compressor using eigenvalue method

A numerical approach to predict the rotating stall in the vaneless diffuser of a centrifugal compressor using eigenvalue method

Discussion: “Rotating Stall Induced in Vaneless Diffusers of Very Low Specific Speed Centrifugal Blowers” (Kinoshita, Y., and Senoo, Y., 1985, ASME J. Eng. Gas Turbines Power, 107, pp. 514–519)

Rotating Stall in Centrifugal Compressor Vaneless Diffuser: Experimental Analysis of Geometrical Parameters Influence on Phenomenon Evolution

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