| 稠密气-固两相旋转射流在气源扰动作用下的流动特征 |
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| 引用本文： | 吕慧,李伟锋,许建良,刘海峰. 稠密气-固两相旋转射流在气源扰动作用下的流动特征[J]. 化工学报, 2012, 63(2): 393-400. DOI: 10.3969/j.issn.0438-1157.2012.02.009 |
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| 作者姓名： | 吕慧 李伟锋 许建良 刘海峰 |
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| 作者单位： | 华东理工大学煤气化教育部重点实验室，上海200237 |
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| 基金项目： | 国家重点基础研究发展计划项目，国家自然科学基金，教育部新世纪优秀人才计划项目 |
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| 摘 要： | 摘要：采用高速摄像仪对气源扰动作用下的稠密气固两相旋转射流进行了实验研究，考察了气源扰动和旋流数对颗粒流动特征的影响。结果表明，气相具有与气源固有频率相同的特征频率，引入旋流后，这一特征频率依然存在。两相流在气源扰动的作用下形成了具有显著周期性的鼓泡结构。当ug＜4.42 m?s-1时，气源扰动主导着鼓泡的形成，此时的鼓泡频率与气相的特征频率近似相等。另外，气源扰动以及强旋的引入能够实现颗粒的迅速弥散，并能获得更大的弥散角。
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| 关 键 词： | 稠密气固两相流 旋转射流 气源扰动 鼓泡 |
| 收稿时间： | 2011-06-22 |
| 修稿时间： | 2011-08-04 |
Characteristics of particle flow in dense gas-particles swirling jet with disturbance of air source |
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| Lü Hui , LI Weifeng , XU Jianliang , LIU Haifeng. Characteristics of particle flow in dense gas-particles swirling jet with disturbance of air source[J]. Journal of Chemical Industry and Engineering(China), 2012, 63(2): 393-400. DOI: 10.3969/j.issn.0438-1157.2012.02.009 |
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| Authors: | Lü Hui LI Weifeng XU Jianliang LIU Haifeng |
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| Affiliation: | (Key Laboratory of Coal Gasification,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China) |
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| Abstract: | An experimental study was undertaken on dense gas-particles swirling jet with disturbance of air source by using high-speed camera.The effects of swirl number and disturbance of air source on the characteristics of particle flow were investigated.The result showed that gas phase had a characteristic frequency which was identical to the natural frequency of fan.The characteristic frequency was still present after the introduction of swirl.Remarkable periodic bubbles were formed under the influence of disturbance of air source.When ug<4.42 m·s-1,disturbance of air source played a central role in the formation of bubbles,and the bubbling frequency was approximately equal to the characteristic frequency of gas phase.In addition,more rapid dispersion of particles and a larger dispersion angle were achieved under the influence of disturbance of air source and strong swirl. |
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| Keywords: | dense gas-particles flow swirling jet disturbance of air source bubble |
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