| Influence of coherent structures in the gas-particle circular cylinder wake flow |
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| 作者姓名： | 嵇峰 刘兰 樊建人 岑可法 |
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| 作者单位： | [1]Clean Energy ＆ Environment Engineering Key Laboratory of Ministry of Education, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China |
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| 摘 要： | INTRODUCTION Turbulent gas-particle flows are frequently found in natural phenomena and industrial processes.Cases of cylinders in cross flows with particles occur in heat exchange equipment,including the convective zone of a fluidized-bed combustor,and in the primary superheaters,reheaters,and economizers of coal-fired boilers.Coherent structures often occur in the above-mentioned gas-particle flow,and have great effect on such different systems,while some features of tur-bulent multiphas…
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| 关 键 词： | 直接数字模拟 气体粒子 汽缸 气体循环 汽轮机 热交换 |
| 收稿时间： | 2004-12-17 |
| 修稿时间： | 2005-02-24 |
Influence of coherent structures in the gas-particle circular cylinder wake flow |
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| Ji Feng,Lu Lan,Fan Jian-ren,Cen Ke-fa.Influence of coherent structures in the gas-particle circular cylinder wake flow[J].Journal of Zhejiang University Science,2005,6(10):1132-1136. |
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| Authors: | Ji Feng Lu Lan Fan Jian-ren Cen Ke-fa |
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| Institution: | (1) Clean Energy & Environment Engineering Key Laboratory of Ministry of Education, Institute for Thermal Power Engineering, Zhejiang University, 310027 Hangzhou, China |
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| Abstract: | To investigate the influence of coherent structures in the gas-particle wake flow, direct numerical simulation (DNS) method was adopted to compute a two-dimensional particle laden wake flow. A high accuracy spectral element method (SEM) was employed to simulate the gas flow field and a Lagrangian approach was used to compute the particles movement. Numerical results showed that at the same Stokes numbers, particles would be greatly impacted by the development of the coherent structure.But with different Stokes numbers, it can be seen that the large-scale vortex structures would influence the particle flow differently.While under different Reynolds numbers (150 and 200), there are no great changes in the particle laden flow. |
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| Keywords: | Direct numerical simulation (DNS) Wake flow Coherent structures Particle laden flow |
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