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
  • [1] TRIVEDI C., A review on fluid structure interaction in hydraulic turbines: A focus on hydrodynamic damping, Engineering Failure Analysis, 77, pp. 1-22, (2017)
  • [2] 4
  • [3] SOLTANI D A, AIDANPAA J O, ENGSTROM F, Et al., A review of available methods for the assessment of fluid added mass, damping, and stiffness with an emphasis on hydraulic turbines, Applied Mechanics Review, 70, 5, (2018)
  • [4] SEELEY C, COUTU A, MONETTE C, Et al., Characterization of hydrofoil damping due to fluid-structure interaction using piezocomposite actuators, Smart Materials & Structures, 21, 3, pp. 35027-35035, (2012)
  • [5] ROTH S, CALMON M, FARHAT M, Et al., Hydrodynamic damping identification from an impulse response of a vibration blade, 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, (2009)
  • [6] MONETTE C, NENNEMANN B, SEELEY C, Et al., Hydro-dynamic damping theory in flowing water, IOP Conference Series: Earth and Environmental Science, (2014)
  • [7] HUBNER B, SEIDEL U, ROTH S., Application of fluid-structure coupling to predict the dynamic behavior of turbine components, IOP conference series: earth and environmental science, (2010)
  • [8] TENGS E, BERGAN C, JAKOBSEN K, Et al., Numerical simulation of the hydrodynamic damping of a vibrating hydrofoil, 29th IAHR Symposium on Hydraulic Machinery and Systems, (2018)
  • [9] BERGAN C W, TENGS E O, SOLEMSLIE B W, Et al., An experimental investigation of the hydrodynamic damping of vibrating hydrofoils, 29th IAHR Symposium on Hydraulic Machinery and Systems, (2018)
  • [10] NENNEMANN B, MONETTE C, CHAMBERLAND-LAUZON J., Hydrodynamic damping and stiffness prediction in Francis turbine runners using CFD, IOP Conference Series: Earth and Environmental Science, (2016)
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