Numerical and Experimental Investigations of the Cavitating Behavior of an Inducer

Bakir, Farid; Rey, Robert; Gerber, A. G.; Belamri, T.; Hutchinson, Brad

doi:10.1155/s1023621x04000028

Cited by 158 publications

(48 citation statements)

References 17 publications

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“…There are also many studies which combine numerical approaches and experimental tests in order to achieve this goal, so it has turned out to be a powerful tool. [6][7][8][9][10] The typical flow structure around an inducer is characterized by a backflow region and vortices. Upstream of the inducer, very complex flow structures are frequently observed.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of cavitating flow through an axial inducer considering tip clearance

Campos–Amezcua

Khelladi

Mazur-Czerwiec

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper presents three-dimensional numerical simulations and experimental investigations of cavitating flow through an axial inducer. Particularly, this work focuses on the influence of radial tip clearance on cavitation behavior. Numerical analysis was carried out on two different configurations: first, the inducer was modeled without taking tip clearance into consideration. Later, the inducer was modeled with nominal tip clearance and some modifications of this. It was found that radial tip clearance has a significant influence on the overall inducer performance in the non-cavitating regime because of the small size of the inducer. Moreover, the effects of radial tip clearance are strong in inducer cavitation behavior. Numerical results and experimental data with nominal tip clearance were compared in cavitating and noncavitating regimes and these were discussed. The cavitation model used for calculation is based on a single-fluid multiphase flow method, assuming thermal equilibrium between phases. It is based on the classical conservation equations of the vapor phase and a mixture phase, with mass transfer due to cavitation appearing as a source and a sink term in the vapor mass fraction equation. Mass transfer rates are derived from the Rayleigh-Plesset model for bubble dynamics.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of cavitating flow through an axial inducer considering tip clearance

Campos–Amezcua

Khelladi

Mazur-Czerwiec

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part A:

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show abstract

“…The homogeneous multiphase flow model was applied where all fluids share the same fields. The Zwart et al [4] cavitation model based on Rayleigh Plesset equation was selected to calculate the inter-phase mass transfer rate when the saturation pressure and mean nucleation site diameter were given. The rotating and stationary domains were connected by the General Grid Interface (GGI).…”

Section: Methodsmentioning

confidence: 99%

“…Many researchers have carried out related numerical and experimental works in turbo machinery. Bakir et al [4] developed a multiphase cavitation model based on a truncated Rayleigh-Plesset equation for bubble dynamics, which was validated on an inducer for a range of flow rates about the overall performance, head drop and the size and location of the cavitation bubble cloud. Richard et al [5] analyzed a centrifugal pump performance under developed cavitating conditions with a twophase Reynolds-averaged Navier-Stokes equations (RANS) method.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller

Zhu

Chen²,

Wei

2014

International Journal of Turbo &Amp; Jet-Engines

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This paper is to study the cavitating characteristics in a low specific speed centrifugal pump with gap structure impeller experimentally and numerically. A scalable DES numerical method is proposed and developed by introducing the von Karman scale instead of the local grid scale, which can switch at the RANS and LES region interface smoothly and reasonably. The SDES method can detect and grasp unsteady scale flow structures, which were proved by the flow around a triangular prism and the cavitation flow in a centrifugal pump. Through numerical and experimental research, it's shown that the simulated results match qualitatively with tested cavitation performances and visualization patterns, and we can conclude that the gap structure impeller has a superior feature of cavitation suppression. Its mechanism may be the guiding flow feature of the small vice blade and the pressure auto-balance effect of the gap tunnel.

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“…the density of nuclei, and the value of n 0 is chosen to be 1.194 Â 10 14 according to Bakir et al 34 and ANSYS. 35 Substituting equations (7) to (9) into equation (4) yields…”

Section: The Gaseous Cavitation Modelmentioning

confidence: 99%

Development and validation of a gaseous cavitation model for hydrodynamic lubrication

Song

Ren

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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The prediction of cavitation in lubricants is of significance to the design and analysis of hydrodynamic bearings. In this paper, a numerical model for the gaseous cavitation in hydrodynamic lubrication problems is derived based on the cavitation mechanism and origination, which is different from the conventional cavitation conditions. The proposed gaseous cavitation model is then used to calculate the performance of several types of bearings, including a two-axially grooved plain journal bearing, a misaligned journal bearing and parallel thrust bearings with surface textures. The results are validated with experimental data and numerical results calculated by the Half-Sommerfeld, Reynolds, and JFO conditions. The advantage of this new model lies in its accuracy and its independence from the cavitation pressure, which is usually difficult to be accurately defined. Thus this gaseous cavitation model can be useful in the accurate prediction of the cavitation phenomenon and performance of hydrodynamic bearings under steady state.

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Numerical and Experimental Investigations of the Cavitating Behavior of an Inducer

Cited by 158 publications

References 17 publications

Numerical and experimental study of cavitating flow through an axial inducer considering tip clearance

Numerical and experimental study of cavitating flow through an axial inducer considering tip clearance

Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller

Development and validation of a gaseous cavitation model for hydrodynamic lubrication

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