Effect of the attack angle on the roll and trailing vortex structures in an agitated vessel with a paddle impeller

Suzukawa, Kazumi; Mochizuki, Shinnsuke; Osaka, Hideo

doi:10.1016/j.ces.2005.10.063

Cited by 19 publications

(14 citation statements)

References 10 publications

(11 reference statements)

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“…The maximum vorticity indicating that the center of the vortices behind the blades is in a position of about 10 o . This is in agreement with observation for paddle impellers presented by Suzukawa et al [29]. The same experimental procedure was used to obtain If the assumption that the vortex core is inside an area where λ 2 is negative is applied on the PIV data the results are shown in Fig.…”

Section: Identification Of the Trailing Vorticessupporting

confidence: 88%

Study of fluid flow in baffled vessels stirred by a Rushton standard impeller

Chára

Kysela

Konfršt

et al. 2016

Applied Mathematics and Computation

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Section: Identification Of the Trailing Vorticessupporting

confidence: 88%

Study of fluid flow in baffled vessels stirred by a Rushton standard impeller

Chára

Kysela

Konfršt

et al. 2016

Applied Mathematics and Computation

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“…The effects of impeller blade inclination on the process characteristics for un-baffled and baffled agitated vessel were studied by Suzukawa et al (2006), Scargiali et al (2014) and Ameur (2016). Using laser Doppler velocimetry method (LDV), Suzukawa et al (2006) studied the effect of the blade attack angle on the roll and trailing vortex structures in a full baffled agitated vessel ( D = 0.49 m) equipped with four-bladed paddle impeller of blade inclination equal to 45 o , 60 o , 75 o or 90 o .…”

Section: Introductionmentioning

confidence: 99%

Power consumption for an agitated vessel equipped with pitched blade turbine and short baffles

Major-Godlewska

Karcz

2017

Chem. Pap.

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Power characteristics for an agitated vessel equipped with planar short baffles of length L and pitched blade turbine of pitch β are presented in the paper. The studies were carried out in the vessel of inner diameter D = 0.6 m, where the baffles were located in the distance p from the vessel bottom (p + L = H). Torque was measured using strain gauge method within the turbulent regime of the flow of Newtonian liquid in the agitated vessel. The effects of the pitch β and geometrical parameter p/H on the power number Ne were determined mathematically. The results showed that, for the assumed value of the angle β, the function Ne = f (L/H) decreases with the decrease in the baffle length L (i.e. with the increase in the parameter p). Moreover, for the assumed value of the baffle length L, the function Ne = f (β) increases with the increase in the angle β of the inclination of the impeller blade.

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“…In the literature, the study of the hydrodynamic structure generated with a pitched blade turbine (PBT) was initiated in several experimental and numerical works on the discharge zone. For example, we can cite the experimental works of Nagata [4], Suzukawa et al [5], Karcz et al [6], Dan Taca et al [7], Armenante et al [8], and Aubin et al [9]. In his experimental study, Nagata [4] studied the effect of the pitched blades on the power number with two pitched blades turbine (PBT2).…”

Section: Introductionmentioning

confidence: 99%

“…In his experimental study, Nagata [4] studied the effect of the pitched blades on the power number with two pitched blades turbine (PBT2). Using a LDA system, Suzukawa et al [5] studied the effect of the pitched blades in a baffled stirred tank equipped with a four pitched blade turbine (PBT4). Karcz et al [6] studied the influence of the baffles on the variation of the power number with a three pitched blades turbine (PBT3).…”

Section: Introductionmentioning

confidence: 99%

Effect of the Tank Design on the Flow Pattern Generated with a Pitched Blade Turbine

Ammar¹,

Driss²,

Chtourou³

et al. 2012

MECHANICS

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The effect of the tank design on the hydrodynamic structure is carried out in three tanks; cylindrical tank, curved tank and spherical tank; equipped with a six-pitched blade turbine (PBT6). The hydrodynamic behaviour is numerically predicted by the resolution of the Navier-Stokes equations in conjunction with the Renormalization Group (RNG) of the k-ε turbulence model. These equations are solved by a control volume discretization method. The numerical results from the application of the CFD code "Fluent" with the Multi Reference Frame (MRF) model are presented in the impeller stream region. Particularly, the velocity components and the turbulent characteristics are presented in different planes containing the blade. The power consumption of these stirred tanks was calculated to choose the most effective system. The comparison between the numerical results and the experimental data showed a good agreement.

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Effect of the attack angle on the roll and trailing vortex structures in an agitated vessel with a paddle impeller

Cited by 19 publications

References 10 publications

Study of fluid flow in baffled vessels stirred by a Rushton standard impeller

Study of fluid flow in baffled vessels stirred by a Rushton standard impeller

Power consumption for an agitated vessel equipped with pitched blade turbine and short baffles

Effect of the Tank Design on the Flow Pattern Generated with a Pitched Blade Turbine

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