Application of Recess Vaned Casing Treatment to Axial Flow Fans

Azimian, A. R.; Elder, R. L.; McKenzie, A. B.

doi:10.1115/1.2927411

Cited by 20 publications

(11 citation statements)

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“…It was mentioned by many investigators [3] that a major criterion for the useful application of casing treatment was that the compressor should be tip critical. To investigate the stall process in the isolated rotor, a comprehensive rotating stall study was carried out utilizing the fast response three-hole probe described above.…”

Section: Smooth Wall Resultsmentioning

confidence: 99%

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Design and experimental investigations of a new type of casing treatment for an axial flow compressor

Zhu

Chu

2006

Proceedings of the Institution of Mechanical Engineers, Part A:

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A new type of bend skewed groove casing treatment was designed on the basis of the test results of the axial skewed groove casing treatment. The influences of utilizing it on an isolated axial-flow rotor, as well as comparisons between it and the axial skewed groove, have been investigated experimentally. The effects on overall performance of the axial chord of the rotor exposed to the treated area have been examined, and the ideal axial position of the casing treatment relative to the rotor leading edge was found. For the tested rotor with the new casing treatment, experimental results showed that significant improvements in stall margin were observed without efficiency penalty (in some axial locations) at two different speeds. Compared with the axial skewed groove casing treatment, the new treated casing at the axial exposure does not increase the secondary circulation in the radial—circumferential plane based on x-wire, hot-wire measurements under the operating conditions near peak efficiency. This can be considered to be one of many factors that keep the rotor efficiency identical.

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Section: Smooth Wall Resultsmentioning

confidence: 99%

“…It seems that those treatments that are more useful in suppressing stall also have larger efficiency decrease. Only the large-scale 'recess vaned' casing treatment [3] was observed to demonstrate the ability to improve stall margin without (in some builds) loss in peak efficiency.…”

Section: Introductionmentioning

confidence: 98%

Design and experimental investigations of a new type of casing treatment for an axial flow compressor

Zhu

Chu

2006

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Azimian et al. 25 investigated the effect of applying a vaned recessed casing treatment to a single-stage axial flow fan, and significant improvements in the stall margin were observed without a loss in peak efficiency. Lu et al.…”

Section: Introductionmentioning

confidence: 99%

Simulation of air jets for controlling stall in a centrifugal fan

Zhang

Wang

Yuan

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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The main goal of the present work is to analyze the three-dimensional unsteady flow field of a centrifugal fan by solving Navier–Stokes equations, coupled with the throttle condition. The results show that rotating stall occurs in the original fan when the flow rate is 4.30 m3/s, and the stall inception first appears at three impeller passages near the volute tongue and front disc. An active control method is proposed to inhibit the stall inception, which involves blowing air at the inlets of the three impeller passages. This blowing control method cannot inhibit the stall inception when the blowing speed is lower than 50 m/s. The stability margin of the centrifugal fan is extended when the blowing speed is increased from 50 to 110 m/s, while no further effect is obvious with a further increase in the blowing speed. At a blowing speed of 110 m/s, rotating stall occurs again when the fan flow reaches 3.46 m3/s. After the application of the nozzle blowing, the safety margin of the centrifugal fan is extended by 13%, and an obvious stability enhancement effect is achieved. From an engineering standpoint, this new active control method for rotating stall offers a valuable means to ensure the safe operation of a centrifugal fan.

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“…Application of recessed vanes casing treatment showed promise for stability improvement without decrement in compressor efficiency [22,23]. Freeman et al [18], carried out experiments on a VIPER engine with a multi-stage compressor to investigate the influence of steady and controlled recirculation on stall control.…”

Section: Recirculation Casing Treatment By Using a Vaned Passage For A Transonic Axial-flow Compressor 1 Introductionmentioning

confidence: 99%

Recirculation casing treatment by using a vaned passage for a transonic axial-flow compressor

Khaleghi

Tousi

Boroomand

et al. 2007

Proceedings of the Institution of Mechanical Engineers, Part A:

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The tip leakage flow has an important influence on compressor performance particularly for the case of transonic compressors. Recirculation casing treatment is an effective approach to control the tip clearance flow which results in stability enhancement. Numerical simulations for a high-speed axial-flow compressor rotor with endwall recirculation, applying a state of the art design for the recirculation passageway are presented in the current study. Anti-swirl vanes are placed in the recirculation passageway. The effects of recirculation casing treatment on the compressor overall characteristics, stability, blade loading, and flow field are presented and discussed. Results show a significant range extension with a very small penalty in efficiency. Besides, the recirculated mass flow is only a few per cent of the main flowrate.

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Application of Recess Vaned Casing Treatment to Axial Flow Fans

Cited by 20 publications

References 0 publications

Design and experimental investigations of a new type of casing treatment for an axial flow compressor

Design and experimental investigations of a new type of casing treatment for an axial flow compressor

Simulation of air jets for controlling stall in a centrifugal fan

Recirculation casing treatment by using a vaned passage for a transonic axial-flow compressor

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