| PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE |
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| 引用本文： | Zhang Xin-yu,Chen Li-hua,Fan Jian-ren,Cen Ke-faDepartment of Energy Engineering,Zhejiang University,Hangzhou 310027,P.R.China. PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE[J]. 水动力学研究与进展(B辑), 1997, 0(4) |
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| 作者姓名： | Zhang Xin-yu Chen Li-hua Fan Jian-ren Cen Ke-faDepartment of Energy Engineering Zhejiang University Hangzhou 310027 P.R.China |
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| 作者单位： | Zhang Xin-yu，Chen Li-hua，Fan Jian-ren，Cen Ke-faDepartment of Energy Engineering，Zhejiang University，Hangzhou 310027，P.R.China |
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| 摘 要： | The changes of the developing turbulent flow characteristics in curved duct after adding a baffle are studied numerically at the body-fitted coordinates.a k-εmodel is used to represent the turbulence.a curved duct of rectangular cross-section is computed firstly, it has been observed that the predictions using the procedure agree very satisfactory with the experimental data.Then,two kinds of square ducts are studied,one is normal curved duct,the other is a duct with a baffle.The computational results are presented and compared to each other,in order to display the changes of the flow after adding a baffle in curved ducts.The secondary flow in a duct with a baffle is characterized by four-vortices structure with the outer two bigger than the inner two.Besides,compared with the duct without a baffle,the intensity of the secondary flows is reduced,which results in the flow field of the cross-section much more equable and has much more significant meaning in the engineering.
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PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE |
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| Zhang Xin-yu,Chen Li-hua,Fan Jian-ren,Cen Ke-fa. PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE[J]. Journal of Hydrodynamics, 1997, 0(4) |
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| Authors: | Zhang Xin-yu Chen Li-hua Fan Jian-ren Cen Ke-fa |
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| Affiliation: | Zhang Xin-yu,Chen Li-hua,Fan Jian-ren,Cen Ke-faDepartment of Energy Engineering,Zhejiang University,Hangzhou 310027,P.R.China |
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| Abstract: | The changes of the developing turbulent flow characteristics in curved duct after adding a baffle are studied numerically at the body-fitted coordinates, a k- model is used to represent the turbulence, a curved duct of rectangular cross-section is computed firstly, it has been observed that the predictions using the procedure agree very satisfactory with the experimental data. Then, two kinds of square ducts are studied, one is normal curved duct. the other is a duct with a baffle. The computational results are presented and compared to each other, in order to display the changes of the flow after adding a baffle in curved ducts. The secondary flow in a duct with a baffle is characterized by four-vortices structure with the outer two bigger than the inner two. Besides, compared with the duct without a baffle,the intensity of the secondary flows is reduced, which results in the flow field of the cross-section much more equable and has much more significant meaning in the engineering. |
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| Keywords: | numerical simulation. curved duct with the baffle. secondary flow |
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