Numerical study of hydrofoil geometry effect on cavitating flow

2012 ◽  
Vol 26 (8) ◽  
pp. 2535-2545 ◽  
Author(s):  
Hyosung Sun
Keyword(s):  
Numerical Study ◽  
Cavitating Flow ◽  
Geometry Effect

Numerical study of cavitating flow over hydrofoil in the presence of air

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Włodzimierz Wróblewski ◽  
Krzysztof Bochon ◽  
Mirosław Majkut ◽  
Krzysztof Rusin ◽  
Emad Hasani Malekshah
Keyword(s):  
Numerical Study ◽  
Cavitating Flow ◽  
Cavitation Model ◽  
Two Phase ◽  
Content Type ◽  
Flow Simulations ◽  
Cavity Structure ◽  
Dynamic Forces ◽  
High Dynamic ◽  
The Impact

Purpose The presence of air in the water flow over the hydrofoil is investigated. The examined hydrofoil is ClarkY 11.7% with an angle of attack of 8 deg. The flow simulations are performed with the assumption of different models. The Singhal cavitation model and the models which resolve the non-condensable gas including 2phases and 3phases are implemented in the numerical model. The calculations are performed with the uRANS model with assumption of the constant temperature of the mixture. The two-phase flow is simulated with a mixture model. The dynamics and structures of cavities are compared with literature data and experimental results. Design/methodology/approach The cavitation regime can be observed in some working conditions of turbomachines. The phase transition, which appears on the blades, is the source of high dynamic forces, noise and also can lead to the intensive erosion of the blade surfaces. The need to control this process and to prevent or reduce the undesirable effects can be fulfilled by the application of non-condensable gases to the liquid. Findings The results show that the Singhal cavitation model predicts the cavity structure and related characteristics differently with 2phases and 3phases models at low cavitation number where the cavitating flow is highly dynamic. On the other hand, the impact of dissolved air on the cloud structure and dynamic characteristic of cavitating flow is gently observable. Originality/value The originality of this paper is the evaluation of different numerical cavitation models for the prediction of dynamic characteristics of cavitating flow in the presence of air.

Experimental/Numerical Study on Cavitating Flow around Clark Y 11.7% Hydrofoil

2012 ◽  
Author(s):  
Hiroki Matsunari ◽  
Satoshi Watanabe ◽  
Yusuke Konishi ◽  
Naoto Suefuji ◽  
Akinori Furukawa
Keyword(s):  
Numerical Study ◽  
Cavitating Flow

Numerical Study of the Natural-Cavitating Flow around Underwater Slender Bodies

2019 ◽  
Vol 54 (6) ◽  
pp. 835-849
Author(s):  
Nguyen Tat Thang ◽  
Duong Ngoc
Keyword(s):  
Numerical Study ◽  
Cavitating Flow ◽  
Slender Bodies

Experimental and numerical study of cavitating flow with suction in a mixing reactor for water treatment

2018 ◽  
Vol 353 ◽  
pp. 796-804 ◽  
Author(s):  
Yunge Zhang ◽  
Yiping Tian ◽  
Zhitao Zhang ◽  
Shaoyun Lin
Keyword(s):  
Water Treatment ◽  
Numerical Study ◽  
Cavitating Flow

Numerical study of complex fracture geometry effect on two-phase performance of shale-gas wells using the fast EDFM method

2018 ◽  
Vol 164 ◽  
pp. 603-622 ◽  
Author(s):  
Mohammad AlTwaijri ◽  
Zhaohui Xia ◽  
Wei Yu ◽  
Liangchao Qu ◽  
Yunpeng Hu ◽  
...  
Keyword(s):  
Shale Gas ◽  
Numerical Study ◽  
Gas Wells ◽  
Two Phase ◽  
Fracture Geometry ◽  
Geometry Effect ◽  
Complex Fracture

scholarly journals Numerical Study on the Influence of Step Casing on Cavitating Flows and Instabilities in Inducers with Equal and Varying Pitches

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1103
Author(s):  
Lu Yu ◽  
Haochen Zhang ◽  
Hui Chen ◽  
Zhigang Zuo ◽  
Shuhong Liu
Keyword(s):  
Flow Field ◽  
Optimization Design ◽  
Numerical Study ◽  
Flow Characteristics ◽  
Cavitating Flow ◽  
Engineering Practice ◽  
Pressure Distributions ◽  
Significant Difference ◽  
Liquid Rocket ◽  
Safety And Stability

It is known that cavitating flow characteristics and instabilities in inducers can greatly impact the safety and stability of a liquid rocket. In this paper, step casing optimization design (Model OE and Model AE) was carried out for two three-bladed inducers with an equal (Model O) and a varying pitch (Model A), respectively. The unsteady cavitation flow field and accompanied instabilities were studied via numerical simulations. Reductions of the cavity size and fluctuation were observed in cases with a step casing. A significant difference in cavity structures was seen as well. Referring to the pressure distributions on the blades and details of the flow field, the mechanism of cavitation suppression was revealed. This work provides a feasible and convenient method in engineering practice for optimizing the characteristic of the cavitating flow field and instabilities for the inducer.

scholarly journals Numerical study of cavitating flow inside a flush valve

2011 ◽  
Vol 12 (6) ◽  
pp. 421-431 ◽  
Author(s):  
Annie-Claude Bayeul-Lainé ◽  
Sophie Simonet ◽  
Daniel Dutheil ◽  
Guy Caignaert
Keyword(s):  
Numerical Study ◽  
Cavitating Flow

scholarly journals Numerical study on cavitating flow due to a hydrofoil near a free surface

2016 ◽  
Vol 1 (3) ◽  
pp. 238-245 ◽  
Author(s):  
Ping-Chen Wu ◽  
Jiahn-Horng Chen
Keyword(s):  
Free Surface ◽  
Numerical Study ◽  
Cavitating Flow
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