Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation
The dynamic characteristics of running away pump turbines (PTs) with a large head variable amplitude have not been understood thus far, primarily because of two difficulties in simulation and analysis. The first is how to provide accurate time-varying boundary conditions for transient simulation of...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2023-12-01
|
| Series: | Engineering Applications of Computational Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19942060.2023.2188910 |
| _version_ | 1797403891283787776 |
|---|---|
| author | Xiaolong Fu Deyou Li Yechen Song Hongjie Wang Jialiang Yang Xianzhu Wei |
| author_facet | Xiaolong Fu Deyou Li Yechen Song Hongjie Wang Jialiang Yang Xianzhu Wei |
| author_sort | Xiaolong Fu |
| collection | DOAJ |
| description | The dynamic characteristics of running away pump turbines (PTs) with a large head variable amplitude have not been understood thus far, primarily because of two difficulties in simulation and analysis. The first is how to provide accurate time-varying boundary conditions for transient simulation of the turbine runaway process (TRP). The other is how to determine the specific appearance time of each frequency component of the complex pressure fluctuations. This study presented a one- and three-dimensional (1D-3D) coupled approach considering waterway dynamics to provide accurate unsteady boundary conditions for the transient flow simulation of a PT with a large head variable amplitude. The short-time Fourier transformation (STFT) approach was adopted to analyse the time-frequency characteristics of the transient pressures and impeller forces. The study found that the fluctuations of pressures and impeller forces during the TRP of the PT with a large head variable amplitude contained two exclusive fluctuation frequency components. The former was approximately three times the rated rotational frequency of the impeller. The later was a series of integer fold transient rotational frequencies of the impeller, which was irrelevant to the rotor-stator interactions. The findings have important value for controlling the pressure fluctuations during the TRP of PTs. |
| first_indexed | 2024-03-09T02:46:06Z |
| format | Article |
| id | doaj.art-2e10e61ce2af49e8b4f088dba4f0c1bd |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-03-09T02:46:06Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-2e10e61ce2af49e8b4f088dba4f0c1bd2023-12-05T16:53:43ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2023-12-0117110.1080/19942060.2023.2188910Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulationXiaolong Fu0Deyou Li1Yechen Song2Hongjie Wang3Jialiang Yang4Xianzhu Wei5School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of ChinaState Key Laboratory of Hydro-Power Equipment, Harbin Institute of Large Electrical Machinery, Harbin, People’s Republic of ChinaThe dynamic characteristics of running away pump turbines (PTs) with a large head variable amplitude have not been understood thus far, primarily because of two difficulties in simulation and analysis. The first is how to provide accurate time-varying boundary conditions for transient simulation of the turbine runaway process (TRP). The other is how to determine the specific appearance time of each frequency component of the complex pressure fluctuations. This study presented a one- and three-dimensional (1D-3D) coupled approach considering waterway dynamics to provide accurate unsteady boundary conditions for the transient flow simulation of a PT with a large head variable amplitude. The short-time Fourier transformation (STFT) approach was adopted to analyse the time-frequency characteristics of the transient pressures and impeller forces. The study found that the fluctuations of pressures and impeller forces during the TRP of the PT with a large head variable amplitude contained two exclusive fluctuation frequency components. The former was approximately three times the rated rotational frequency of the impeller. The later was a series of integer fold transient rotational frequencies of the impeller, which was irrelevant to the rotor-stator interactions. The findings have important value for controlling the pressure fluctuations during the TRP of PTs.https://www.tandfonline.com/doi/10.1080/19942060.2023.2188910Large head variable amplitude pump-turbineturbine runaway processone- and three-dimensional coupled simulationpressure fluctuationflow pattern evolution |
| spellingShingle | Xiaolong Fu Deyou Li Yechen Song Hongjie Wang Jialiang Yang Xianzhu Wei Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation Engineering Applications of Computational Fluid Mechanics Large head variable amplitude pump-turbine turbine runaway process one- and three-dimensional coupled simulation pressure fluctuation flow pattern evolution |
| title | Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation |
| title_full | Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation |
| title_fullStr | Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation |
| title_full_unstemmed | Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation |
| title_short | Dynamic characteristics of a running away pump-turbine with large head variation: 1D + 3D coupled simulation |
| title_sort | dynamic characteristics of a running away pump turbine with large head variation 1d 3d coupled simulation |
| topic | Large head variable amplitude pump-turbine turbine runaway process one- and three-dimensional coupled simulation pressure fluctuation flow pattern evolution |
| url | https://www.tandfonline.com/doi/10.1080/19942060.2023.2188910 |
| work_keys_str_mv | AT xiaolongfu dynamiccharacteristicsofarunningawaypumpturbinewithlargeheadvariation1d3dcoupledsimulation AT deyouli dynamiccharacteristicsofarunningawaypumpturbinewithlargeheadvariation1d3dcoupledsimulation AT yechensong dynamiccharacteristicsofarunningawaypumpturbinewithlargeheadvariation1d3dcoupledsimulation AT hongjiewang dynamiccharacteristicsofarunningawaypumpturbinewithlargeheadvariation1d3dcoupledsimulation AT jialiangyang dynamiccharacteristicsofarunningawaypumpturbinewithlargeheadvariation1d3dcoupledsimulation AT xianzhuwei dynamiccharacteristicsofarunningawaypumpturbinewithlargeheadvariation1d3dcoupledsimulation |