Research on flow field characteristic of close-coupled gas atomizing nozzles
The atomization nozzle is the core component for the metal powder preparation by close-coupled gas atomization method. The pressure at the tip of the melt delivery tube and the stagnation point is very important for the smooth outflow of the molten metal during the atomization process. When the tip...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Powder Metallurgy Technology
2024-06-01
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| Series: | Fenmo yejin jishu |
| Subjects: | |
| Online Access: | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2021120015 |
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| _version_ | 1846169228095258624 |
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| author | BAN Wei CHEN Jiaqi LIU Lulu GE Tao ZHANG Shuai |
| author_facet | BAN Wei CHEN Jiaqi LIU Lulu GE Tao ZHANG Shuai |
| author_sort | BAN Wei |
| collection | DOAJ |
| description | The atomization nozzle is the core component for the metal powder preparation by close-coupled gas atomization method. The pressure at the tip of the melt delivery tube and the stagnation point is very important for the smooth outflow of the molten metal during the atomization process. When the tip of the melt delivery tube is positive pressure, the molten metal cannot flow out of the nozzle smoothly, and in severe cases, it may cause the back spray of the molten metal. The greater the pressure at the stagnation point, the greater the impact force of the atomized gas acting on the molten metal flowing out of the melt delivery tube, and the better the crushing effect. The effects of atomization pressure, protrusion length, and cone-apex angle on the pressure at the tip of the melt delivery tube and the stagnation point were studied by mathematical modeling, experimental verification, and numerical simulation in this paper. The results show that, with the increase of atomization pressure, the length of the negative pressure area remains basically unchanged, while the pressure at the stagnation point increases. With the increase of the melt delivery tube elongation, the length of the negative pressure area increases and the pressure at the stagnation point decreases. With the increase of the cone-apex angle of the melt delivery tube, the pressure at the tip of tube changes from the negative to the positive, resulting in the failure of atomization. |
| format | Article |
| id | doaj-art-d79486ed976c4d5d8c7bd4e718f69d65 |
| institution | Kabale University |
| issn | 1001-3784 |
| language | zho |
| publishDate | 2024-06-01 |
| publisher | Editorial Office of Powder Metallurgy Technology |
| record_format | Article |
| series | Fenmo yejin jishu |
| spelling | doaj-art-d79486ed976c4d5d8c7bd4e718f69d652024-11-13T05:47:05ZzhoEditorial Office of Powder Metallurgy TechnologyFenmo yejin jishu1001-37842024-06-0142331231910.19591/j.cnki.cn11-1974/tf.2021120015Research on flow field characteristic of close-coupled gas atomizing nozzlesBAN Wei0CHEN Jiaqi1LIU Lulu2GE Tao3ZHANG Shuai4School of Mechanical Engineering, Ningxia University, Yinchuan 750021, ChinaLiupanshan Laboratory, Yinchuan 750011, ChinaSchool of Mechanical Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Mechanical Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Mechanical Engineering, Ningxia University, Yinchuan 750021, ChinaThe atomization nozzle is the core component for the metal powder preparation by close-coupled gas atomization method. The pressure at the tip of the melt delivery tube and the stagnation point is very important for the smooth outflow of the molten metal during the atomization process. When the tip of the melt delivery tube is positive pressure, the molten metal cannot flow out of the nozzle smoothly, and in severe cases, it may cause the back spray of the molten metal. The greater the pressure at the stagnation point, the greater the impact force of the atomized gas acting on the molten metal flowing out of the melt delivery tube, and the better the crushing effect. The effects of atomization pressure, protrusion length, and cone-apex angle on the pressure at the tip of the melt delivery tube and the stagnation point were studied by mathematical modeling, experimental verification, and numerical simulation in this paper. The results show that, with the increase of atomization pressure, the length of the negative pressure area remains basically unchanged, while the pressure at the stagnation point increases. With the increase of the melt delivery tube elongation, the length of the negative pressure area increases and the pressure at the stagnation point decreases. With the increase of the cone-apex angle of the melt delivery tube, the pressure at the tip of tube changes from the negative to the positive, resulting in the failure of atomization.https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2021120015nozzlesclose-coupled gas atomizationnumerical simulationmelt delivery tube |
| spellingShingle | BAN Wei CHEN Jiaqi LIU Lulu GE Tao ZHANG Shuai Research on flow field characteristic of close-coupled gas atomizing nozzles Fenmo yejin jishu nozzles close-coupled gas atomization numerical simulation melt delivery tube |
| title | Research on flow field characteristic of close-coupled gas atomizing nozzles |
| title_full | Research on flow field characteristic of close-coupled gas atomizing nozzles |
| title_fullStr | Research on flow field characteristic of close-coupled gas atomizing nozzles |
| title_full_unstemmed | Research on flow field characteristic of close-coupled gas atomizing nozzles |
| title_short | Research on flow field characteristic of close-coupled gas atomizing nozzles |
| title_sort | research on flow field characteristic of close coupled gas atomizing nozzles |
| topic | nozzles close-coupled gas atomization numerical simulation melt delivery tube |
| url | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2021120015 |
| work_keys_str_mv | AT banwei researchonflowfieldcharacteristicofclosecoupledgasatomizingnozzles AT chenjiaqi researchonflowfieldcharacteristicofclosecoupledgasatomizingnozzles AT liululu researchonflowfieldcharacteristicofclosecoupledgasatomizingnozzles AT getao researchonflowfieldcharacteristicofclosecoupledgasatomizingnozzles AT zhangshuai researchonflowfieldcharacteristicofclosecoupledgasatomizingnozzles |