Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition
The structure of the flow field inside a torque converter was quantitatively evaluated using dynamic mode decomposition (DMD). The input time series data in the interference region of the cascade blades were measured using particle image velocimetry (PIV). The spatiotemporal flow field was decompose...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Society of Automotive Engineers of Japan, Inc.
2020-07-01
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| Series: | International Journal of Automotive Engineering |
| Online Access: | https://www.jstage.jst.go.jp/article/jsaeijae/11/3/11_20204476/_article/-char/ja |
| _version_ | 1797341194017046528 |
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| author | Yasunori Kunisaki Shigeru Murata Yohsuke Tanaka |
| author_facet | Yasunori Kunisaki Shigeru Murata Yohsuke Tanaka |
| author_sort | Yasunori Kunisaki |
| collection | DOAJ |
| description | The structure of the flow field inside a torque converter was quantitatively evaluated using dynamic mode decomposition (DMD). The input time series data in the interference region of the cascade blades were measured using particle image velocimetry (PIV). The spatiotemporal flow field was decomposed by DMD into several modes. Each DMD mode corresponds to the frequency of the flow field fluctuation. The flow field frequency mainly consisted of blade passing frequencies and their harmonics. The flow field was visualized for each DMD mode. Positive and negative vortex structures were generated alternately in the direction of rotation of the impeller and turbine. It was found that the vortex structure became smaller at a lower speed ratio. |
| first_indexed | 2024-03-08T10:14:24Z |
| format | Article |
| id | doaj.art-2df06cc5ea5941ba9d4707e9f7d6c569 |
| institution | Directory Open Access Journal |
| issn | 2185-0992 |
| language | English |
| last_indexed | 2024-03-08T10:14:24Z |
| publishDate | 2020-07-01 |
| publisher | Society of Automotive Engineers of Japan, Inc. |
| record_format | Article |
| series | International Journal of Automotive Engineering |
| spelling | doaj.art-2df06cc5ea5941ba9d4707e9f7d6c5692024-01-29T04:39:10ZengSociety of Automotive Engineers of Japan, Inc.International Journal of Automotive Engineering2185-09922020-07-0111310811510.20485/jsaeijae.11.3_108Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving ConditionYasunori Kunisaki0Shigeru Murata1Yohsuke Tanaka2Graduate School of EngineeringFaculty of Mechanical EngineeringFaculty of Mechanical EngineeringThe structure of the flow field inside a torque converter was quantitatively evaluated using dynamic mode decomposition (DMD). The input time series data in the interference region of the cascade blades were measured using particle image velocimetry (PIV). The spatiotemporal flow field was decomposed by DMD into several modes. Each DMD mode corresponds to the frequency of the flow field fluctuation. The flow field frequency mainly consisted of blade passing frequencies and their harmonics. The flow field was visualized for each DMD mode. Positive and negative vortex structures were generated alternately in the direction of rotation of the impeller and turbine. It was found that the vortex structure became smaller at a lower speed ratio.https://www.jstage.jst.go.jp/article/jsaeijae/11/3/11_20204476/_article/-char/ja |
| spellingShingle | Yasunori Kunisaki Shigeru Murata Yohsuke Tanaka Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition International Journal of Automotive Engineering |
| title | Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition |
| title_full | Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition |
| title_fullStr | Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition |
| title_full_unstemmed | Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition |
| title_short | Internal Flow Structure of Torque Converter Analyzed with Dynamic Mode Decomposition under Steady Driving Condition |
| title_sort | internal flow structure of torque converter analyzed with dynamic mode decomposition under steady driving condition |
| url | https://www.jstage.jst.go.jp/article/jsaeijae/11/3/11_20204476/_article/-char/ja |
| work_keys_str_mv | AT yasunorikunisaki internalflowstructureoftorqueconverteranalyzedwithdynamicmodedecompositionundersteadydrivingcondition AT shigerumurata internalflowstructureoftorqueconverteranalyzedwithdynamicmodedecompositionundersteadydrivingcondition AT yohsuketanaka internalflowstructureoftorqueconverteranalyzedwithdynamicmodedecompositionundersteadydrivingcondition |