Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction
To reasonably divide the types of flow units along the latticework subchannel, one must prepare for the establishment of a one-dimensional fluid network model of the latticework in the middle region of the turbine blade. The characteristics of the flow structure along the latticework subchannel were...
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MDPI AG
2024-12-01
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| Series: | Aerospace |
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| author | Minlong Li Huishe Wang Ke Yang Rongguo Yu Jingze Ton |
| author_facet | Minlong Li Huishe Wang Ke Yang Rongguo Yu Jingze Ton |
| author_sort | Minlong Li |
| collection | DOAJ |
| description | To reasonably divide the types of flow units along the latticework subchannel, one must prepare for the establishment of a one-dimensional fluid network model of the latticework in the middle region of the turbine blade. The characteristics of the flow structure along the latticework subchannel were studied by numerical simulation. The effects of rib angle (15–45°), the ratio of rib width to rib spacing (0.3–1.0), and inlet Reynolds umber (21,000–80,000) on the flow structure along the subchannel are summarized. The results indicated that the ratio of rib width to rib spacing and inlet Reynolds number had no effect on the distribution position of each flow unit in the subchannel. The change of rib angle did not change the flow structure type along the subchannel. The longitudinal vortex was mainly formed by one turning vortex and two detached vortices. The narrowing of the turning channel will cause the turning vortex to induce a secondary longitudinal vortex. There were five kinds of flow structures along the subchannel: transverse vortex zone (entrance of the inlet section), uniform flow zone (inlet section), longitudinal vortex generation zone (turning channel section), longitudinal vortex zone (turning channel section), and longitudinal vortex free development zone (outlet section). This finding provides support for the selection of empirical formulas for each module in the one-dimensional modeling of subchannels. Finally, the boundary prediction equations of each flow structure in the subchannel were established, and the average prediction error was less than 10%. The rationality of the flow structure division along the latticework subchannel was improved, and the modeling efficiency of the latticework one-dimensional model was optimized. |
| format | Article |
| id | doaj-art-caf98f39c8ed4f1a8ab6dfe95b38a361 |
| institution | Kabale University |
| issn | 2226-4310 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Aerospace |
| spelling | doaj-art-caf98f39c8ed4f1a8ab6dfe95b38a3612025-01-24T13:15:30ZengMDPI AGAerospace2226-43102024-12-011212210.3390/aerospace12010022Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary PredictionMinlong Li0Huishe Wang1Ke Yang2Rongguo Yu3Jingze Ton4Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaTo reasonably divide the types of flow units along the latticework subchannel, one must prepare for the establishment of a one-dimensional fluid network model of the latticework in the middle region of the turbine blade. The characteristics of the flow structure along the latticework subchannel were studied by numerical simulation. The effects of rib angle (15–45°), the ratio of rib width to rib spacing (0.3–1.0), and inlet Reynolds umber (21,000–80,000) on the flow structure along the subchannel are summarized. The results indicated that the ratio of rib width to rib spacing and inlet Reynolds number had no effect on the distribution position of each flow unit in the subchannel. The change of rib angle did not change the flow structure type along the subchannel. The longitudinal vortex was mainly formed by one turning vortex and two detached vortices. The narrowing of the turning channel will cause the turning vortex to induce a secondary longitudinal vortex. There were five kinds of flow structures along the subchannel: transverse vortex zone (entrance of the inlet section), uniform flow zone (inlet section), longitudinal vortex generation zone (turning channel section), longitudinal vortex zone (turning channel section), and longitudinal vortex free development zone (outlet section). This finding provides support for the selection of empirical formulas for each module in the one-dimensional modeling of subchannels. Finally, the boundary prediction equations of each flow structure in the subchannel were established, and the average prediction error was less than 10%. The rationality of the flow structure division along the latticework subchannel was improved, and the modeling efficiency of the latticework one-dimensional model was optimized.https://www.mdpi.com/2226-4310/12/1/22gas turbineturbine bladelatticework subchannelflow structureprediction model |
| spellingShingle | Minlong Li Huishe Wang Ke Yang Rongguo Yu Jingze Ton Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction Aerospace gas turbine turbine blade latticework subchannel flow structure prediction model |
| title | Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction |
| title_full | Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction |
| title_fullStr | Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction |
| title_full_unstemmed | Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction |
| title_short | Study on Flow Structure Characteristics Along the Latticework Duct Subchannels and Classification Boundary Prediction |
| title_sort | study on flow structure characteristics along the latticework duct subchannels and classification boundary prediction |
| topic | gas turbine turbine blade latticework subchannel flow structure prediction model |
| url | https://www.mdpi.com/2226-4310/12/1/22 |
| work_keys_str_mv | AT minlongli studyonflowstructurecharacteristicsalongthelatticeworkductsubchannelsandclassificationboundaryprediction AT huishewang studyonflowstructurecharacteristicsalongthelatticeworkductsubchannelsandclassificationboundaryprediction AT keyang studyonflowstructurecharacteristicsalongthelatticeworkductsubchannelsandclassificationboundaryprediction AT rongguoyu studyonflowstructurecharacteristicsalongthelatticeworkductsubchannelsandclassificationboundaryprediction AT jingzeton studyonflowstructurecharacteristicsalongthelatticeworkductsubchannelsandclassificationboundaryprediction |