Research on numerical prediction methods of hydrodynamic damping ratio for a hydrofoil based on one-way and two-way fluid-structure interactions

被引：0
|
作者：
Zeng Y. [1 ]
Yao Z. [1 ,2 ]
Hong Y. [1 ,2 ]
Wang F. [1 ,2 ]
机构：
[1] College of Water Resources & Civil Engineering, China Agricultural University, Beijing
[2] Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2020年 / 51卷 / 11期
关键词：
Hydrodynamic damping ratio; Hydrofoil; Identify method; One-way FSI; Two-way FSI;
D O I：
10.13243/j.cnki.slxb.20200171
中图分类号：
学科分类号：
摘要：
In order to evaluate the dynamic response amplitude of a hydraulic machinery induced by external transient load, the hydrodynamic damping effect caused by fluid-structure interaction (FSI) must be considered. How to accurately predict the hydrodynamic damping parameters of an underwater structure is a difficult problem in evaluating the stability of hydraulic machinery during the design stage. The studies on the vibration characteristics and hydrodynamic damping ratio predicting methods of a NACA 0009 hydrofoil are carried out by one-way and two-way FSI numerical simulations, at the velocities range from 5-20m/s. The simulation results show that: the first bending mode shapes are consistent in still water and at the velocity of 20m/s, and the relative variations of natural frequencies for low-order modes of hydrofoil are within 3.95% under different velocities. Based on this, proved that the assumption of mode shape and natural frequency independent on the velocity for one-way FSI method is reasonable. The averaged relative deviation between hydrodynamic damping obtained by one-way FSI and experiment is 11.42%. Two-way FSI does not require this assumption, which offers higher accuracy to predict the natural frequencies of low-order modes, the vortex shedding frequencies of the hydrofoil and the hydrodynamic damping ratios, with averaged relative deviations of 4.36%, 4.24% and 4.95%, respectively, compared with the experimental results. Both one-way and two-way FSI methods can obtain the relationship that the hydrodynamic damping ratio increases liner with velocity. While in the example in this paper, the calculation time required for the two-way FSI is 15 times of the one-way FSI under the same computing resource conditions. In practical engineering applications, it is recommended to use the one-way FSI method in order to save time. © 2020, China Water Power Press. All right reserved.
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页码：1432 / 1439
页数：7
相关论文
共 21 条
  • [11] GAUTHIER J P, GIROUX A M, ETIENNE S, Et al., A numerical method for the determination of flow-induced damping in hydroelectric turbines, Journal of Fluids and Structures, 69, pp. 341-354, (2017)
  • [12] LIAGHAT T, GUIBAULT F, ALLENBACH L, Et al., Two-way fluid-structure coupling in vibration and damping analysis of an oscillating hydrofoil, Proceedings of the ASME 2014 International Mechanical Engineering Congress and Exposition, (2014)
  • [13] ZENG Y S, YAO Z F, GAO J Y, Et al., Numerical investigation of added mass and hydrodynamic damping on a blunt trailing edge hydrofoil, Journal of Fluids Engineering, 141, 8, (2019)
  • [14] NENNEMANN B, MONETTE C., Prediction of vibration amplitudes on hydraulic profiles under von Karman vortex excitation, IOP Conference Series: Earth and Environmental Science, (2019)
  • [15] ZENG Y S, YAO Z F, ZHOU P J, Et al., Numerical investigation into the effect of the trailing edge shape on added mass and hydrodynamic damping for a hydrofoil, Journal of Fluids and Structures, 88, pp. 167-184, (2019)
  • [16] 7
  • [17] MENTER F R, LANGTRY R B, LIKKI S R, Et al., A correlation-based transition model using local variables-part I: model formulation, Proceedings of ASME Turbo Expo 2004 Power for Land, Sea, and Air, (2004)
  • [18] 8
  • [19] CUPR P, STEFAN D, HABAN V, Et al., FSI analysis of francis-99 hydrofoil employing SBES model to adequately predict vortex shedding, Journal of Physics: Conference Series, 1296, 1, (2019)
  • [20] YAO Z F, WANG F J, DREYER M, Et al., Effect of trailing edge shape on hydrodynamic damping for a hydrofoil, Journal of Fluids and Structures, 51, pp. 189-198, (2014)
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