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Open AccessArticle

Investigation on the Effect of Structural Parameters on Cavitation Characteristics for the Venturi Tube Using the CFD Method

1
Research Centre of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
2
Department Ingeniera Rural y Agroalimentaria, Unidad Hidráulica, Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
*
Author to whom correspondence should be addressed.
Water 2019, 11(10), 2194; https://doi.org/10.3390/w11102194
Received: 30 August 2019 / Revised: 8 October 2019 / Accepted: 18 October 2019 / Published: 22 October 2019
(This article belongs to the Special Issue Pipeline Fluid Mechanics)
The venturi tube is a special kind of pipe which has been widely applied in many fields. Cavitation is one of the most important research issues for the Venturi tube. Hence, three key structural parameters (contraction angle, diffusion angle and contraction ratio) were selected to investigate the influence of different factors on cavitation characteristics, using the computational fluid dynamics (CFD) method. A series of experiments for measuring the relationship between differential pressure and flow rate were carried out to verify the accuracy of the simulation method. Results showed that the simulation results had a high accuracy and the numerical method was feasible. The average vapor volume fraction of cross-section from the throat in the axial direction increased with increasing contraction angle. The cavity length increased with increasing contraction angle. The average volume fraction in the diffusion section rapidly decreased with increasing diffusion angle. The diffusion angle had no significant effect on the cavitation characteristics in the throat section and had a significant influence in the diffusion section. The average vapor volume fraction increased with decreasing contraction ratio. The contraction ratio had no significant effect on the cavity length under the same differential pressure. The average vapor volume fraction increased with decreasing contraction ratio. However, the variation in the throat section was less than the diffusion section. Under the same inlet and outlet pressure, the cavity lengths for different contraction ratios were basically the same, which indicated that the contraction ratio had no significant effect on the cavity length. View Full-Text
Keywords: venturi tube; cavitation characteristic; vapor volume fraction; CFD venturi tube; cavitation characteristic; vapor volume fraction; CFD
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MDPI and ACS Style

Tang, P.; Juárez, J.M.; Li, H. Investigation on the Effect of Structural Parameters on Cavitation Characteristics for the Venturi Tube Using the CFD Method. Water 2019, 11, 2194. https://doi.org/10.3390/w11102194

AMA Style

Tang P, Juárez JM, Li H. Investigation on the Effect of Structural Parameters on Cavitation Characteristics for the Venturi Tube Using the CFD Method. Water. 2019; 11(10):2194. https://doi.org/10.3390/w11102194

Chicago/Turabian Style

Tang, Pan; Juárez, Juan M.; Li, Hong. 2019. "Investigation on the Effect of Structural Parameters on Cavitation Characteristics for the Venturi Tube Using the CFD Method" Water 11, no. 10: 2194. https://doi.org/10.3390/w11102194

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