High performance computing of compressor rotating stall and stall control

Chen, Jen‐Ping; Webster, Robert S.; Hathaway, Michael D.; Herrick, Gregory P.; Skoch, Gary J.

doi:10.3233/ica-2009-0305

Cited by 13 publications

(7 citation statements)

References 31 publications

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“…Hoying et al 24 Axial compressor Rotor blade tip In-house code (MIT) März et al 25 Axial compressor Rotor blade tip In-house code (NASA) Chen et al 23 Axial compressor Rotor blade tip In-house code (OSU) Legras et al 26 Axial compressor Rotor blade tip elsA ONERA Choi et al 27 Axial fan Rotor In-house code (Rolls-Royce) Sano et al 28 Centrifugal pump Vaned diffuser SCRYU/Tetra Lucius and Brenner 29 Centrifugal pump Rotor ANSYS CFX Table 2. Documented cases of rotating stall in numerical simulations for centrifugal compressors.…”

Section: Machine Type Rs Location Solvermentioning

confidence: 99%

Prediction of impeller rotating stall onset using numerical simulations of a centrifugal compressor. Part 1: Detection of rotating stall using fixed-flow transient simulations

Vagani

Engeda

Cave³

2013

Proceedings of the Institution of Mechanical Engineers, Part A:

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Rotating stall is an unsteady flow phenomenon that appears in both axial and centrifugal compressors. It is detrimental to the performance of the compressor, significantly narrowing its operating range. Numerical modeling of this phenomenon has been a major area of investigation for axial compressors with some success. While stall occurs less often in centrifugal compressors than axial ones, it can be much harder to predict. Some preventive measures are known but are mostly rules of thumb developed through experimental experience. This work focuses on the detection of impeller rotating stall using computational fluid dynamics. A compressor was chosen that has demonstrated rotating stall instabilities with different diffuser lengths and return vanes. Unsteady numerical simulations were performed on full 360 models of this geometry. The transient simulations were conducted using distributed processing on high-performance servers. The objective was to determine the accuracy in which rotating stall can be captured in simulations. For this purpose, simulation results were compared to experimental results for the same compressor and show a good correlation between the experimental and numerical tests.

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Section: Machine Type Rs Location Solvermentioning

confidence: 99%

Prediction of impeller rotating stall onset using numerical simulations of a centrifugal compressor. Part 1: Detection of rotating stall using fixed-flow transient simulations

Vagani

Engeda

Cave³

2013

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…McKain and Holbrook [14] reported the complete dimensions with the design specifications of the NASA CC3 compressor. This compressor is commonly used for simulating surge and stall as can be found in several studies [9,[15][16][17][18][19][20].…”

Section: Case Studymentioning

confidence: 99%

Numerical investigation of rotating stall in centrifugal compressor with vaned and vaneless diffuser

et al. 2015

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This study presents a numerical simulation of the stall and surge in a centrifugal compressor and presents a description of the stall development in two different cases. The first case is for a compressor with vaneless diffuser and the second is for a compressor with vaned diffuser of the vane island shape. The main aim of this study is to compare the flow characteristics and behavior for the two compressors near the surge operating condition and provide further understanding of the diffuser role when back flow occurs at surge. Results showed that for a location near the diffuser entrance, the amplitude of the static pressure fluctuations for the vaneless diffuser case is higher than that for the vaned diffuser case near surge condition. These pressure fluctuations in the case of the vaneless diffuser appear with a gradual decrease of the mean pressure value as a part of the surge cycle. While for the case of the vaned diffuser, the pressure drop during surge occurs faster than the case of the vaneless diffuser.Also, results indicated that during surge in the case of vaneless diffuser, there is a region with low velocity and back flow that appears as a layer connecting all impeller passages near shroud surface and this layer develops in size with time. On the other hand, for the case of vaned diffuser during surge, the low velocity regions appear in random locations in some passages and these regions expand with time towards the shroud surface. Results showed that during stall, the impeller passages are exposed to identical impact from stall cells in the case of vaneless diffuser while the stall effect varies from passage to another in the case of the vaned diffuser.

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“…Since rotating stall is an unsteady phenomenon, it is most frequently simulated using transient simulations. 17,18 However, these simulations are time consuming taking upwards of a day per impeller revolution 17 unless significant computational resources, on the order of 100 computer processing units (CPU), are employed. 18 This is further hampered because an accurate simulation using parallel processing requires a minimum of 75,000 grid nodes be run per CPU to avoid bleed through numerical error.…”

Section: Introductionmentioning

confidence: 99%

Geometric considerations in the capture of localized flow reversal in centrifugal compressor vaneless diffusers using steady state simulations

Clarke

Marechale²,

Engeda

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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A steady state simulation procedure is proposed to capture localized flow reversal inside of a centrifugal compressor vaneless diffuser. The procedure was performed on 12 compressor stages of varying geometry for speed lines of 13,100, 19,240, and 21,870 r/min. The simulations were run for all points from choke to surge including the experimentally determined rotating stall onset point. The experimental data and geometry were provided by Solar Turbines Inc. San Diego, CA. It was found possible to capture localized flow reversal inside of a vaneless diffuser using a steady state simulation. The results showed that using a geometric parameter, comparing the diffuser width, b4, to the impeller blade pitch distance, dpitch, it could be determined whether or not a steady state simulation could capture localized flow reversal. For values of b4/dpitch beneath 0.152 flow reversal could not be captured. But, for values of b4/dpitch above 0.177 localized flow reversal was captured. For values between 0.152 and 0.177, no conclusions could be drawn. Where possible, experimental data were compared against the diffuser inlet and outlet numerical profiles and the meridional contour plot. These comparisons served to validate the approach used in this article. These validations showed that the procedure defined herein is accurate and trustworthy within a specific range of geometric and flow characteristics. There are two other conclusions. First, the b4/dpitch parameter helps to define the type of flow breakdown. For b4/dpitch below 0.152, the flow breaks down in the circumferential direction, but for values of b4/dpitch above 0.177, the flow breaks down in the span-wise direction. Second, the simulations were able to capture instances of localized flow reversal before rotating stall onset. This concludes that localized flow reversal is not the determining factor in rotating stall onset as has been suggested by other investigators.

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High performance computing of compressor rotating stall and stall control

Cited by 13 publications

References 31 publications

Prediction of impeller rotating stall onset using numerical simulations of a centrifugal compressor. Part 1: Detection of rotating stall using fixed-flow transient simulations

Prediction of impeller rotating stall onset using numerical simulations of a centrifugal compressor. Part 1: Detection of rotating stall using fixed-flow transient simulations

Numerical investigation of rotating stall in centrifugal compressor with vaned and vaneless diffuser

Geometric considerations in the capture of localized flow reversal in centrifugal compressor vaneless diffusers using steady state simulations

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