Experimental and numerical study of a spiral structure at the periphery of an aspirated rotor–stator cavity

Ragazzoni, David; Buisine, Daniel

doi:10.1007/s00348-006-0160-7

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…These subtle flow phenomena interact with the main flow and can threaten the efficiency and stable operation of centrifugal compressors (Qin, Sun, Wang, Ju, & Zhang, 2016). In earlier studies, the rotor and stationary components were simplified to a 'rotating stationary disk' problem to examine the flow structure in detail (Remy, Gauthier, & Buisine, 2005;Remy & Buisine, 2006;Jiao & Fu, 2016). However, in recent years, studies have focused on investigating the actual structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of rotor–stator component partition structure on the aerodynamic performance of centrifugal compressors

Shi³

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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The partition structure (PS) between the impeller and stationary blade of a centrifugal compressor considerably influences a compressor's performance. Based on computational fluid dynamics, this study constructed a coupling calculation model for the main flow, wheel cover, wheel disk side partition clearance, and sealing structure. Furthermore, we examined the influence that different PS shapes (i.e. circular arc, trapezoidal, and rectangular) and radial clearances (2, 4, and 6 mm) at the entrance of the cavity between the rotor and stator components have on the aerodynamic performance and loss mechanism of the centrifugal compressor using a numerical method. The influence that the PS has on the transition zone between the impeller outlet and stator inlet sections was analysed in detail. According to the results, when the PS was in a circular arc form, with a clearance of 2 mm, it achieved the highest efficiency, which increased the efficiency of the original model by 0.99% and the total pressure ratio by 1.23%. Moreover, an examination of the main flow interaction provided an enhanced insight into the microflow phenomenon in centrifugal compressors. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Influence of rotor–stator component partition structure on the aerodynamic performance of centrifugal compressors

Shi³

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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Flows around rotating disks with and without rim-shroud gap

Watanabe

Furukawa

2009

Exp Fluids

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The effect of rim-shroud gap on the spiral rolls formed around a rotating disk

Watanabe

Furukawa

2010

Physics of Fluids

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In this paper, we use the numerical and empirical approaches and investigate the flow around a finite size disk in a finite size outer cylindrical casing. The disk is located at the center of the stationary casing and it is supported by a driving shaft through the disk and the casing. The disk rotates with the driving shaft. Five sizes of disks with different thicknesses and radii are used. The main purpose of this paper is to estimate the effect of the radial gaps on the entire flows. The combination of the thickness of the disk with smaller radius and the inner side of the casing with larger radius forms Taylor–Couette-like vortex flow in the radial gap. The supercritical instability makes the unsteady wavy vortex flow around the disk rim. When the axial gap between the disk surface and the end-wall of the casing is wide, the unsteady wavy flow is convected along the end-wall of the casing and it makes spiral rolls with negative front angles. When the axial gap is narrower and the Reynolds number is small, the instabilities are confined in the radial gap, and a beadlike flow appears around the disk rim. At higher Reynolds number, the turbulent spirals and the mixed spirals with positive and negative front angles are predicted. It is also shown that the phase velocity of the spiral is about or above the half of the velocity of the rotating disk.

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Experimental and numerical study of a spiral structure at the periphery of an aspirated rotor–stator cavity

Cited by 5 publications

References 13 publications

Influence of rotor–stator component partition structure on the aerodynamic performance of centrifugal compressors

Influence of rotor–stator component partition structure on the aerodynamic performance of centrifugal compressors

Flows around rotating disks with and without rim-shroud gap

The effect of rim-shroud gap on the spiral rolls formed around a rotating disk

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