|
| Numerical characterization of flow perturbation and prediction of fluidelastic instability based on flow cell model |
| Received:September 16, 2023 Revised:December 06, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20230916003 |
| KeyWord:flow induced vibration fluid-elastic instability flow cell model flow perturbation tube bundle |
| Author | Institution |
| 冯志鹏 |
中国核动力研究设计院 核反应堆技术全国重点实验室, 成都 |
| 齐欢欢 |
中国核动力研究设计院 核反应堆技术全国重点实验室, 成都 |
| 蔡逢春 |
中国核动力研究设计院 核反应堆技术全国重点实验室, 成都 |
|
| Hits: 44 |
| Download times: 35 |
| Abstract: |
| In order to improve the predictive ability and applicability of the flow-cell model,and obtain a universal method that can quantitatively characterize its numerous flow perturbation parameters,the dynamic equation of the classical flow-cell model is established through theoretical derivation.Based on two-dimensional fluid-structure interaction simulation,a flow perturbation parameter identification method is developed to study the area perturbation,velocity perturbation,and pressure perturbation(including steady-terms,phase difference,and perturbation terms) of the flow-cell.Then,taking the phase difference function as an example,its mathematical expression is integrated as the basic input parameter of the flow-cell model to predict the fluidelastic instability behavior of the tube bundle.The results show that the proposed method has successfully obtained the relationships between flow perturbation parameters and curve coordinates and time.The steady-terms of the flow perturbation with the curvilinear coordinates are in sine form,and the relationship between the phase difference and the curvilinear coordinates is in linear form.The predicted critical velocity is in good agreement with the experimental values,proving the feasibility of combining numerical characterization of flow perturbation and basic assumptions of flow-cell models to predict fluid-elastic instability,and providing a feasible approach for the development of fluidelastic instability models. |
|
|
|