Volume 4: Fluid-Structure Interaction最新文献_第3页

Pitch and Pattern Effects on Streamwise Fluidelastic Instability in Tube Arrays 节距和图案对管阵列流向流体弹性不稳定性的影响

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93327

Marwan Hassan, D. Weaver

{"title":"Pitch and Pattern Effects on Streamwise Fluidelastic Instability in Tube Arrays","authors":"Marwan Hassan, D. Weaver","doi":"10.1115/pvp2019-93327","DOIUrl":"https://doi.org/10.1115/pvp2019-93327","url":null,"abstract":"\u0000 Fluidelastic instability (FEI) is well known to be a critical flow-induced vibration concern for the integrity of the tubes in nuclear steam generators. Traditionally, this has been assumed to occur in the direction transverse to the direction of flow but the tube failures at San Onofre Nuclear Generating Station (SONGS) in Los Angeles proved that this assumption is not generally valid. A simple tube-in-channel theoretical model was previously developed to predict streamwise as well as transverse FEI in a parallel triangular tube array. This predicted that this array geometry was particularly sensitive to streamwise FEI for high mass-damping parameters and small pitch ratios, the conditions in which the SONGS failures occurred. The advantage of this simple modelling approach is that no new empirical data are required for parametric studies of the effects of tube pattern and pitch ratio on FEI. The tube-in-channel model has been extended to in-line square, normal triangular and rotated square tube arrays and the stability of these geometric patterns are analyzed for the effects of varying pitch ratio and the mass-damping parameter. The results are compared with the available experimental data and conclusions are drawn regarding the relative vulnerability of these different tube array geometries to streamwise FEI.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131356439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Added Mass Coefficient and Coupling Effect of Concentric Tube Bundles 同心管束附加质量系数及耦合效应研究

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93363

Zhenshu Zhang, Kai Guo, Tianbao Zhang, W. Tan

{"title":"Study on Added Mass Coefficient and Coupling Effect of Concentric Tube Bundles","authors":"Zhenshu Zhang, Kai Guo, Tianbao Zhang, W. Tan","doi":"10.1115/pvp2019-93363","DOIUrl":"https://doi.org/10.1115/pvp2019-93363","url":null,"abstract":"\u0000 The added mass coefficient is an important parameter when calculating the flow induced vibration (FIV) in heat exchangers. The calculation method of the added mass coefficient for tube bundles in triangular and square arrays had been presented in relevant standards which like GB/T 151. Presently, concentric arrays of tube bundles are applied extensively in the heat exchangers at nuclear power plants. However, the method for calculating the added mass coefficient of tube bundles in concentric arrays has not been given in these standards. In this paper, in order to calculate the added mass coefficient of a central flexible tube surrounded by rigid tubes in concentric arrays, the fluid-structure interaction models of tube bundles has been established by ANSYS CFX. The influence of the circumferential and radial distance of the tube bundles on the added mass coefficient has been studied by calculating the natural frequency. The results are expected to provide the calculation reference for added mass coefficient of the tube bundles in concentric arrays. The coupling vibration of tube bundles in concentric arrays has been studied by the other model which is made up of all the flexible tubes, and the coupling vibration of the tube bundles is simulated by the rigid wall motion of ANSYS CFX. According to simulation results, there exists a band of amplitude peaks in the coupling vibration of the tube bundles. It is shown that as the circumferential and radial distance increases, the band of amplitude peaks becomes narrow.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124411379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the Protection of the End Cover of the Cylindrical Containment Vessel 圆柱形安全壳端盖防护的研究

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93147

Zhang Liucheng, D. Qi, Yang Sha, Feng Jiahe, Hu Rongxi

引用次数: 0

A Hybrid Model to Analyze the Fluid-Structure Interaction Phenomenon of a Relief System and Experimental Validation 一种分析泄放系统流固耦合现象的混合模型及实验验证

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93779

F. Zheng, Fuzheng Qu, Xueguan Song

{"title":"A Hybrid Model to Analyze the Fluid-Structure Interaction Phenomenon of a Relief System and Experimental Validation","authors":"F. Zheng, Fuzheng Qu, Xueguan Song","doi":"10.1115/pvp2019-93779","DOIUrl":"https://doi.org/10.1115/pvp2019-93779","url":null,"abstract":"\u0000 As one essential component of a pressurized system, a relief valve is used to guarantee the pressure within a prescribed range. But in practical engineering, pressure fluctuation caused by the operation of a relief valve will travel along the pipeline and couple with the motion of the valve, which might result in malfunction of the valve and the system. In order to investigate the fluid-structure interaction (FSI) phenomenon, a hybrid model combining the method of characteristics (MOC) and computational fluid dynamics (CFD) method is proposed. In the hybrid FSI model, the characteristics of pressure resource is modeled using the performance curves, the compressible gas transmitting in the pipe is calculated by one-dimensional MOC, and the air flow in the valve as well as the valve motion is simulated by a two-dimensional CFD model. To validate the hybrid model, 1:1 scaled test rig is conducted. The compared results show that the hybrid model not only can accurately capture the pressure fluctuation in straight pipeline induced by the closure of the valve but also can accurately predict the forms of the valve motion.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128082200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on Fluidelastic Instability Accompanied by Wake Shedding With a Time-Domain Model 伴随尾流脱落的流体弹性不稳定性时域模型研究

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93339

Kai Guo, Yipeng Wang, Tong Su, Liyan Liu, Zhanbin Jia, W. Tan

{"title":"Investigation on Fluidelastic Instability Accompanied by Wake Shedding With a Time-Domain Model","authors":"Kai Guo, Yipeng Wang, Tong Su, Liyan Liu, Zhanbin Jia, W. Tan","doi":"10.1115/pvp2019-93339","DOIUrl":"https://doi.org/10.1115/pvp2019-93339","url":null,"abstract":"\u0000 As the most dangerous flow-induced vibration (FIV) mechanism, fluid-elastic instability is always accompanied by the wake shedding. If both of the two FIV mechanisms are considered, fluid forces in this condition can be quite complex. In this paper, a time-domain model based on unsteady flow theory was used to investigate the fluid-elastic instability in a rotated triangular tube array. The vortex shedding forces were simplified as harmonic forces. Computational fluid dynamics (CFD) was used to get the fluid force coefficients with vortex shedding. The model was established by a finite element code with MATLAB software and simulation results agreed with the experiment results. The results showed the critical instability velocity can be influenced by vortex shedding forces, and double peaks can be found in the frequency spectrum of displacements of tubes. The time-domain displacements showed the phases had been impacted by the shedding and periodic characteristic was found in the displacements results. The model can also be adopted in fluid-elastic instability analysis in other tube arrangements and flow conditions.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123016812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of Sloshing Wave Crest Impact Acting on a Fixed Roof Cylindrical Tank Subjected to a Sinusoidal Excitation 正弦激励下固定顶圆柱形储罐的晃动波峰冲击仿真

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93379

Y. Toyoda, Y. Ohtori

{"title":"Simulation of Sloshing Wave Crest Impact Acting on a Fixed Roof Cylindrical Tank Subjected to a Sinusoidal Excitation","authors":"Y. Toyoda, Y. Ohtori","doi":"10.1115/pvp2019-93379","DOIUrl":"https://doi.org/10.1115/pvp2019-93379","url":null,"abstract":"\u0000 This paper describes the applicability of an open source code “OpenFOAM” on estimating of sloshing wave crest impact pressure acting on a fixed roof of cylindrical tank. Based on the computed results, slosh-induced pressure loads and distribution on the tank roof is presented. A series of large scale tests, which are conducted on the “E-defence” shaking table, has been analyzed. In the shaking table tests, partially water-filled cylindrical tank (diameter/height:3m, water depth:2.3m/1.9m) with the flat fixed roof was subjected to a sinusoidal excitation at the first sloshing resonant frequency. The computer code well simulated the observed waveform with a sharp pressure peak at the time of liquid impact on the tank roof, including appearance of negative pressures in the post impact period, with sufficient accuracy. As for the liquid impact zone of the tank roof, the numerical results indicated good agreement with the observed ones. Consequently, the computer code was capable of predicting the complex nonlinear sloshing behavior with the collision of the liquid surface against the tank roof with an acceptable level of accuracy.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115064880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Investigation of Fluid-Elastic Vibration of Square Array Tube Bundle in Two Phase Flow 方阵管束两相流流体弹性振动实验研究

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93473

Ryoichi Kawakami, Seinosuke Azuma, T. Nariai, K. Hirota, H. Morita, Y. Kondo, Yoshiteru Komuro

{"title":"Experimental Investigation of Fluid-Elastic Vibration of Square Array Tube Bundle in Two Phase Flow","authors":"Ryoichi Kawakami, Seinosuke Azuma, T. Nariai, K. Hirota, H. Morita, Y. Kondo, Yoshiteru Komuro","doi":"10.1115/pvp2019-93473","DOIUrl":"https://doi.org/10.1115/pvp2019-93473","url":null,"abstract":"\u0000 The in-plane (in-flow) fluid-elastic instability (in-plane FEI) of triangular tube arrays caused tube-to-tube wear indications as observed in the U-bend regions of tube bundles of the San Onofre Unit-3 steam generators[1]. Several researches revealed that the in-plane FEI is likely to occur in a tightly packed triangular tube array under high velocity and low friction conditions, while it is not likely to occur in a square array tube bundle. In order to confirm the potential of steam-wise fluid-elastic instability of square arrays, the critical flow velocity in two-phase flow, (sulfur hexafluoride-ethanol) which simulates steam-water flow, was investigated.\u0000 Two types of test rigs were prepared to confirm the effect of the tube diameter and tube pitch ratio on the critical velocity. In both rigs, vibration amplitudes were measured in both in-flow and out-of-flow directions in various flow conditions. In any case, in-flow fluid elastic instability was not detected. Based on the results of the tests, it is concluded that the flow interaction force is small for concern to occur the fluid-elastic instability in the in-flow direction of the square tube bundles of steam generators.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115366350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Flow Approach Angle on Acoustic Resonance Excitation of In-Line Tube Bundles in Cross-Flow 流进角对横流管束声共振激励的影响

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93445

M. Alziadeh, A. Mohany, Marwan Hassan

{"title":"Effect of Flow Approach Angle on Acoustic Resonance Excitation of In-Line Tube Bundles in Cross-Flow","authors":"M. Alziadeh, A. Mohany, Marwan Hassan","doi":"10.1115/pvp2019-93445","DOIUrl":"https://doi.org/10.1115/pvp2019-93445","url":null,"abstract":"\u0000 This paper presents preliminary experimental results on the influence of the flow approach angle on the acoustic resonance excitation of in-line tube bundles in cross-flow. The pitch-to-diameter ratio (P/D) of the in-line tube bundles investigated is P/D = 1.733. The flow approach angle was investigated by physically rotating the tube bundle clockwise relative to the flow direction. The tube bundles are capable of rotating with increments of 5° up to an angle of 45°. For brevity, only the results for the 0° and 30° orientation will be presented herein. For the 0° orientation, two Strouhal frequencies (St1 = 0.437 and St2 = 0.252) were observed. However, only one of these frequencies (St1 = 0.437) was capable of exciting resonance. During resonance, a peak sound pressure level (SPL) of 170 dB was achieved. The Strouhal frequencies and peak SPL agrees well with what has been presented in the literature. For the 30° orientation, only one Strouhal frequency (St1 = 0.98) was measured. At this orientation, the lock-in phenomenon occurred at a much lower flow velocity compared to the 0° orientation with a peak SPL reaching 153 dB. Jumps in the lock-in frequency were observed at the 30° orientation. This phenomenon is associated with two reasons. The first reason is a partial lock-in with an acoustic resonant mode, due to the acoustic energy not being fully trapped within the tube bundle. The second reason is related to the changes in the apparent speed of sound resulting in variations in the acoustic cross-mode frequency depending on where the excitation source is emanating from within the tube bundle. A brief summary of the results is presented in this paper.","PeriodicalId":185894,"journal":{"name":"Volume 4: Fluid-Structure Interaction","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129266882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sweeplus®: An Integrated Solution to Pipe Vibration Failures Sweeplus®:管道振动故障综合解决方案

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93023

Yuqing Liu, P. Diwakar, Ismat El Jaouhari, D. Lin

引用次数: 0

Experimental Investigation on Flow Field Characteristics by Drag Reducing Agent Additives in Stirred Vessel 减阻剂添加剂在搅拌容器内流场特性的实验研究

Volume 4: Fluid-Structure Interaction Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93415

Xueyu Qi, Ting Wu, Yiming Chen, Ke Yang, Wei Zhao, Wen Wang, J. Gong

引用次数: 0