Effect of Tip Clearance on the Cavitation Flow in a Shunt Blade Inducer

Guo, Xiaomei; Jiang, Chongyang; Qian, Heng; Zhu, Zuchao; Zhou, Changquan

doi:10.3390/en15176330

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…Xiang et al [12] performed a sequence of experiments to investigate the effect of tip clearance size on cavitation characteristics in a turbopump inducer and found that large tip clearance distinctly reduces both the non-cavitation and cavitation performance. Guo et al [13,14] studied the effect of tip clearance on the cavitating flow within a shunt inducer, revealed the flow mechanism of tip clearance, and found that the tip clearance has a certain influence on the critical cavitation coefficient. Zhang et al [15] applied numerical simulations to study the turbulence caused by cavitation in an axial flow pump and analyzed the origin and the evolution of the perpendicular cavitation vortex in detail.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Tip Clearance on Cavitation Performance and Entropy Production of an Axial Flow Pump

Yu,

Cheng,

et al. 2024

JMSE

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The clearance existing between the impeller rim and the adjacent shroud within the pump configuration establishes conducive circumstances for the initiation of cavitation. The bubbles generated by cavitation will flow forward with the water, blocking the channel, and result in the degradation of the pump performance. When the cavitation is severe, vibration and noise will be generated. The impact formed by the collapse of the bubbles will seriously erode the blades and form pits on the blade surfaces. Drawing upon the outcomes derived from numerical simulations, this paper investigates the relationship between tip clearance and cavitation in an axial flow pump, with a specific focus on energy dissipation characteristics. The principal findings indicate that the dimensions of the tip clearance predominantly influence the spatial distribution of the tip leakage vortex (TLV) cavitation. The entropy production rate distribution at the tip correlates with both the cavitation level of the pump and the extent of the tip clearance. The shedding phenomenon of the TLV becomes more evident when analyzing the distribution of entropy production rates. During cavitation, an increased tip clearance is associated with a reduction in the dissipation of viscous entropy production within the impeller domain, and the entropy production resulting from turbulent dissipation significantly surpasses that arising from viscous dissipation.

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Section: Introductionmentioning

confidence: 99%

Study on the Influence of Tip Clearance on Cavitation Performance and Entropy Production of an Axial Flow Pump

Yu,

Cheng,

et al. 2024

JMSE

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Influence of Tip Clearance on Cavitation Characteristics of an Inducer of Turbopump: CFD Study

Han

Lian²,

Xu³

et al. 2022

Processes

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The tip clearance, a compact gap between the inducer blade tip and casing wall, is critical to both the liquid leakage and cavitation-induced forces of a turbopump. In this study, we numerically investigate the effect of tip clearance on the cavitation characteristics of an inducer. Six different tip clearances, 0.1, 0.3, 0.5, 1.0, 1.5, and 2 mm, namely Models A–F, were designed to evaluate the cavitation performance, cavity structure, blade loading, radial force, etc. Model D (1.0 mm) had the relatively highest head coefficient and smallest cavity area on each blade as compared to all other models. The pressure coefficient distribution and blade loading further confirmed that Model D can maintain a higher pressure head and better suppress the cavitation onset than the other models. The radial force signals in the time and frequency domains show that Model D has an intermediate force magnitude with slightly higher noises at the rotating frequency and its harmonic frequencies. Model D also has a relatively smaller vortex region and smaller vortex strength (λ2 criterion). In short, all results show that Model D is the best alternative to balance the complex interactions of the bulk flow and tip leakage flow, compromising the hydraulic head and rotating cavitation.

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Effect of Tip Clearance on the Cavitation Flow in a Shunt Blade Inducer

Cited by 2 publications

References 25 publications

Study on the Influence of Tip Clearance on Cavitation Performance and Entropy Production of an Axial Flow Pump

Study on the Influence of Tip Clearance on Cavitation Performance and Entropy Production of an Axial Flow Pump

Influence of Tip Clearance on Cavitation Characteristics of an Inducer of Turbopump: CFD Study

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