| DNS of the turbulence modulation by dispersed particles in compressible spatially developing two-phase jets |
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| 引用本文： | LUO Kun,FAN Jianren,CEN Kefa. DNS of the turbulence modulation by dispersed particles in compressible spatially developing two-phase jets[J]. 自然科学进展(英文版), 2004, 14(9): 817-821. DOI: 10.1080/10020070412331344381 |
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| 作者姓名： | LUO Kun FAN Jianren CEN Kefa |
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| 作者单位： | Institute for Thermal Power Engineering and CE & EE, Zhejiang University, Hangzhou 310027, China,Institute for Thermal Power Engineering and CE & EE, Zhejiang University, Hangzhou 310027, China,Institute for Thermal Power Engineering and CE & EE, Zhejiang University, Hangzhou 310027, China |
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| 摘 要： | A new two-way coupled direct numerical simulation (DNS) method is developed to study the turbulence modulation in the compressible and spatial developing particle-laden turbulent jets with higher Reynolds number. The high-resolution solver is performed for the gas phase flow-field and the Lagrangian method is used to trace particles. It is found that the particles with Stokes number of 0.01and 50 advance the evolution of the coherent structures in the flow-field, but the particles with Stokes number of 1 delay it. All particles increase the turbulent kinetic energy and decrease the vorticity thickness, in which the particles with the Stokes number of 1 exhibit the maximum modulation. The jet velocity half-width and the decay of the streamwise mean velocity along the centerline are reduced by particles with Stokes number of 0.01 and 1. The momentum thickness is increased by particles and the larger the Stokes number is, the larger the momentum thickness is.
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| 关 键 词： | DNS turbulent modulation gas-solid jets two-way coupling |
DNS of the turbulence modulation by dispersed particles in compressible spatially developing two-phase jets |
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| LUO Kun,FAN Jianren,CEN Kefa. DNS of the turbulence modulation by dispersed particles in compressible spatially developing two-phase jets[J]. Progress in Natural Science, 2004, 14(9): 817-821. DOI: 10.1080/10020070412331344381 |
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| Authors: | LUO Kun FAN Jianren CEN Kefa |
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| Affiliation: | Institute for Thermal Power Engineering and CE & EE, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | A new two-way coupled direct numerical simulation (DNS) method is developed to study the turbulence modulation in the compressible and spatial developing particle-laden turbulent jets with higher Reynolds number. The high-resolution solver is performed for the gas phase flow-field and the Lagrangian method is used to trace particles. It is found that the particles with Stokes number of 0.01and 50 advance the evolution of the coherent structures in the flow-field, but the particles with Stokes number of 1 delay it. All particles increase the turbulent kinetic energy and decrease the vorticity thickness, in which the particles with the Stokes number of 1 exhibit the maximum modulation. The jet velocity half-width and the decay of the streamwise mean velocity along the centerline are reduced by particles with Stokes number of 0.01 and 1. The momentum thickness is increased by particles and the larger the Stokes number is, the larger the momentum thickness is. |
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| Keywords: | DNS turbulent modulation gas-solid jets two-way coupling |
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