Article
Engineering, Marine
Jacques Honigbaum, Fernando Alves Rochinha
Summary: High-fidelity computational models used in vortex-induced vibrations applications may not be adequate when multiple code runs are required. In this study, a wake oscillator modeling approach is adopted, where the flow is described by a nonlinear oscillator while the solid response is of interest. Instead of estimating parameters, the missing term describing the action of the flow on the structure is discovered through the sparse identification of nonlinear dynamics. The performance of the proposed methodology is evaluated through exploration of multiple scenarios.
Article
Mechanics
Weixiong Zheng, Fuyan Lyu, Jinpeng Su, Changxuan Jiang, Dongliang Zhao, Miao Wu
Summary: High-concentration viscous paste experiences high conveying resistance during transportation in high-pressure long-distance pipelines. Flow back of the paste during pump reversal leads to violent pipeline system vibration and reduced conveying efficiency. A quasi-two-dimensional model was established to study the transient flow characteristics and backflow in the pipeline. The model, based on the constitutive equation of viscoplastic fluid, assumed axisymmetric flow and weak compressibility. The pressure and velocity distributions were investigated under different conditions using the finite-difference method, and the results validated the model.
Article
Chemistry, Multidisciplinary
Zhe Liu, Huiping Li, Baichun Li, Jiaxin Chen, Yong Liu
Summary: Branched hydraulic lines are prone to leakage and break under complex working conditions. A method combining finite element simulation and fluid-structure interaction vibration experiments is proposed to solve the coupling vibration problem caused by fluid pressure beat and external mechanical excitation at the junction of the cross-type hydraulic pipeline branch.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Marine
Lingxiao Quan, Jing Gao, Changhong Guo, Chen Fu
Summary: This study focuses on the hydraulic system of a certain type of submarine, and simulates water hammer pressures and fluid-structure interaction vibration characteristics of the pipeline. The simulation results are validated through modal testing, and the pipeline vibration stress is effectively reduced through genetic algorithm optimization.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Tao Yu, Zhongyi Zhang, Decong Zhang, Mingxin Juan, Jie Jin
Summary: This paper investigates the fluid-structure interaction vibration characteristics of a multi-branch pipeline. A finite element model is established and validated through modal testing. The results show that the multi-branch junction affected by vortex fluid is the main cause of fluid-induced vibration, and fluid and structural parameters have a significant influence on the vibration characteristics of the pipeline.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Yu Chen, Caihu Zhao, Qiang Guo, Jianxu Zhou, Yong Feng, Kunbo Xu
Summary: This research focuses on the pipe vibration induced by water hammer and the fluid-structure interaction (FSI) that arises as a result. A six-equation model is developed to describe the vibration behavior of a pipeline embedded in concrete, considering Poisson coupling and junction coupling. An iterative approach is proposed to solve this model, and the results are validated through experiments and classical water-hammer theory. Furthermore, the dynamic FSI responses to water hammer are studied, and the effects of different parameters of concrete on hydraulic pressure, pipe wall stress, and axial motion are discussed.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Nuclear Science & Technology
Zhanfeng Chen, Ke Han, Fengsheng Ren, Weiping Zhu, Keqing Lu, He Yang, Wen Wang
Summary: In this paper, the effect of fluid-structure interaction on the transverse vibration of nuclear power pipelines is analyzed theoretically and numerically. A theoretical model of the nuclear power pipe and the fluid is established and an analytical solution of the transverse vibration differential equation is obtained. Finite element analysis is also carried out. The results show that the analytical solutions are consistent with the finite element solutions and the negative effect of transverse vibration due to fluid-structure interaction on the pipe strength is only significant at high pressure or velocity.
NUCLEAR ENGINEERING AND DESIGN
(2023)
Article
Acoustics
Shuo Wang, Liaojun Zhang, Guojiang Yin
Summary: This study investigates the hydraulic and structural vibration sources of a pumping station. A three-dimensional fluid-solid coupling model of the pumping station is established, and a two-way fluid-structure interaction (FSI) method is used to calculate the coupled vibration responses. The hydraulic and structural vibration sources are explored based on frequency analysis and vibration energy transmission perspective. The research provides a scientific basis for structural vibration control, reduction, and isolation design of pumping stations.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Engineering, Mechanical
P. Wang, C. W. Wong, Y. Zhou, W. Xu
Summary: This study experimentally investigates the flow-induced vibration of an elastic cylinder placed between two rigid cylinders under axial flow. Results show that the lateral vibration of the elastic cylinder is influenced by the eddy motions in the gaps between the cylinders.
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Energy & Fuels
Jia-Xiang Zhang, Jin-Ya Zhang, Ye Zhou, Zi-Yi-Yi Cheng, Guang-Da Cao
Summary: This study focuses on the slug flow condition and performs unsteady simulations and fluid-structure interaction calculations on a self-designed three-stage multiphase pump. The results show that the gas-liquid two-phase flow pattern in the multiphase pump changes sharply under the influence of slug flow, leading to severe fluctuations in the differential pressure, spindle torque, and deformation of the pump.
Article
Engineering, Mechanical
Yongbo Yang, Zhaohong Qin, Yahui Zhang
Summary: This paper proposes a nonstationary random response analysis method and fatigue damage assessment formula for aero hydraulic pipeline systems. The method describes the nonstationary random response using a time-varying power spectral density function and utilizes a frequency-domain iterative solution and fast Fourier transform to calculate the time-varying power spectral density function. The method shows high computational efficiency in a wide-band random airframe motion environment.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Jiang-Hai Wu, Yu-Dong Sun, Ming-Zhu Su, Xia-Ying Hao, Tao He
Summary: Two types of periodic composite pipes with support or dynamic vibration absorber are designed based on the theory of phononic crystals. The axial vibration and band gaps of the composite fluid-filled pipe are calculated using the transfer matrix method and Bloch wave theory. The results show that the stop bands frequency of velocity responses are in good agreement with the band gap, and the length of a single cell affects the starting frequency and width of the band gaps.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Energy & Fuels
Enbin Liu, Xingjie Wang, Wanwei Zhao, Zhongya Su, Qikun Chen
Summary: This study investigated the abnormal vibration of pipelines at Yongchang gas station, proposing a vibration reduction scheme of increasing pipe diameter and adding appropriate constraints which was verified through simulation. The main conclusions include identifying fluid pressure fluctuation as the root cause of abnormal vibration, noting that vibration becomes more severe with larger gas transmission volumes, and determining that the proposed scheme has the best vibration reduction effect.
Article
Multidisciplinary Sciences
Qiaolei Sun, Yuwei Liu, Long Deng, Jiangang Wang, Ding Feng
Summary: A mechanical model suitable for deepwater test string was proposed and the dynamic response of the test string under different frequencies, different water depths, and different fluctuation amplitudes was analyzed using the finite element method. The results showed that the response parameters tended to be stable after a certain period of fluctuation in the axial force and internal pressure. The amplitude, frequency, and period of the fluctuation had significant effects on the response parameters. The conclusions provide a basis for analyzing and preventing fatigue failure in test strings.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Mechanical
Zhongliang Xie, Xuerui Wang, Weidong Zhu
Summary: This study investigates the fluid structure interaction (FSI) dynamic behaviors of water-lubricated bearings with axial asymmetric grooves. Revised FSI models considering cavitation and turbulent effects are proposed. The simulations are consistent with existing literature and experimental data, confirming the accuracy of the model. The effects of groove types and locations on dynamic behaviors are systematically explored, showing that the separation effects of the local asymmetric grooves coupled with the rotation effects enhance the hydrodynamic effects, leading to increased maximum pressure values and load carrying capacity (LCC).
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Chemical
Lingxiao Quan, Haihai Gao, Changhong Guo, Shichao Che
Article
Engineering, Mechanical
Zhifang Ke, Wei Wei, Cheng Liu, Meng Guo, Qingdong Yan
TRIBOLOGY INTERNATIONAL
(2020)
Article
Chemistry, Multidisciplinary
Meng Guo, Cheng Liu, Qingdong Yan, Zhifang Ke, Wei Wei, Juan Li
Summary: This study focused on the influence of parameters on the performance and cavitation characteristics of hydraulic torque converter. By developing different computational fluid dynamics models with cavitation, the researchers were able to predict the behavior of torque converter fluid and modify the cavitation model to improve calculation accuracy. The test results showed a decrease in prediction error under stall operating condition, providing insight on the influences of empirical parameters on internal cavitation behavior and overall hydrodynamic performance.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Haihai Gao, Changhong Guo, Lingxiao Quan
Summary: This paper investigates the fluid-structure interaction (FSI) in aircraft hydraulic pipes, proposing a comprehensive fourteen-equation model and solution method. The model is validated through experiments on an ARJ21-700 aircraft hydraulic pipe with complex constraints, demonstrating the universal laws of FSI response in aircraft hydraulic pipes.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
Cheng Liu, Meng Guo, Qingdong Yan, Wei Wei
Summary: In this study, cavitation inside a torque converter was investigated using numerical and experimental methods. It was found that the charge pressure and charging oil configuration significantly affect the fluid behavior and performance of the torque converter, especially in terms of the capacity constant. Increasing the charge pressure and charging the oil from the turbine-stator clearance were effective in suppressing cavitation development.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Thermodynamics
Meng Guo, Cheng Liu, Jiahua Zhang, Shiqi Liu, Qingdong Yan, Boo Cheong Khoo
Summary: The performance of torque converters is greatly affected by temperature, as it reduces cavitation and affects the hydraulic performance. The optimum operating temperature range is 30-60 degrees Celsius.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2022)
Article
Mechanics
Meng Guo, Cheng Liu, Jiahua Zhang, Shiqi Liu, Zhifang Ke, Qingdong Yan, Boo Cheong Khoo
Summary: This study investigates the effects of pump and turbine blade exit angles on the cavitation characteristics and flow field in a hydraulic torque converter. The results show that increasing the blade exit angles promotes cavitation generation and intensification, while reducing the angles suppresses cavitation and improves performance.
Article
Mechanics
Meng Guo, Cheng Liu, Shiqi Liu, Zhifang Ke, Wei Wei, Qingdong Yan, Boo Cheong Khoo
Summary: Cavitation in hydraulic torque converters can significantly affect their working performance and service life. The study analyzed pressure data and found that cavitation reduces hydraulic performance, impairs fluid flow, and disrupts flow field stability. Spectrum analysis can be used to evaluate the occurrence and severity of cavitation.
Article
Engineering, Chemical
Haihai Gao, Changhong Guo, Lingxiao Quan, Shuai Wang
Summary: This paper focuses on the frequency domain fluid-structure interaction (FSI) vibration characteristics of aircraft hydraulic pipe with complex constraints. The linear partial differential fourteen-equation model is used to describe the nonlinear FSI dynamics of pipes conveying fluid with high-speed, high-pressure, a wide Reynolds number, and the vibration frequency range. The resulting models are solved by the improved Laplace transform transfer matrix method (LTTMM) in the frequency domain. The dynamic response characteristics of an aircraft hydraulic pipe containing diverse constraints are investigated numerically and experimentally under four types of working conditions.
Article
Engineering, Marine
Meng Guo, Cheng Liu, Shiqi Liu, Jiahua Zhang, Zhifang Ke, Qingdong Yan, Boo Cheong Khoo
Summary: This study proposed and developed a visualization experimental system to investigate the cavitation properties of viscous fluids, and a three-dimensional computational fluid dynamics (CFD) model based on the finite volume method (FVM) to study the cavitation characteristics and unsteady cavitation behaviors. The results showed that cavitation started on the suction surface of the hydrofoil near the head, and the critical cavitation number and the critical velocity were 5.2 and 10 m/s at an operating pressure of zero. The cavitation process of the viscous oil around the hydrofoil was highly unstable and periodic, with an evolution frequency of 47 Hz.
Article
Engineering, Electrical & Electronic
Jiahua Zhang, Qingdong Yan, Cheng Liu, Meng Guo, Wei Wei
Summary: The purpose of this paper is to improve the prediction accuracy of transient torque converter cavitation flow by using scale-resolving simulation methods. The study focuses on cavitation vortex flow. Different turbulence models were used to analyze the internal flow field of the torque converter and validate the prediction accuracy. The study found that the application of the stress-blended eddy simulation model significantly improved the prediction accuracy of the cavitation flow field.
Article
Mechanics
Meng Guo, Cheng Liu, Zhifang Ke, Qingdong Yan, Zhengxing Zuo, Boo Cheong Khoo
Summary: A three-dimensional computational fluid dynamics model was developed to study the cavitation characteristics in viscous oil. It was found that cavitation occurred on the suction surface of the hydrofoil and was significantly influenced by flow conditions. A visual experimental system was proposed to investigate the cavitation properties in viscous oil.
Article
Engineering, Electrical & Electronic
Cheng Liu, Chen Jin, Meng Guo, Qingdong Yan, Wei Wei
Summary: The hydraulic torque converter is a key component in high-power tracked vehicles, and its axial force is influenced by charging oil conditions. A computational fluid dynamics method is used to study the axial force characteristic of the torque converter and its oil effects. A novel axial force-testing method is proposed, and experiments on a torque converter prototype have been completed. The research findings reveal the impact of oil viscosity and pressure on the axial force, and a formula for the axial force is proposed under different oil pressures. A novel method to suppress axial force without altering the structure is also validated.
Article
Engineering, Electrical & Electronic
Meng Guo, Cheng Liu, Qingdong Yan, Wei Wei, Boo Cheong Khoo
Summary: Cavitation in hydraulic torque converters can lead to performance degradation and failure, and increasing pump rotating speed intensifies cavitation, reducing hydraulic transmission capacity and efficiency significantly and altering cavitation bubble characteristics.
