| STABILITY OF VORTEX STREET IN GAS-LIQUID TWO-PHASE FLOW |
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| 作者姓名： | LI Yong-guang |
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| 作者单位： | Li Yong-guang
Department of Power Engineering，Shanghai Institute of Electric Power，Shanghai 200090，China，e-
mail: lyga@public6.sta.net.cn
Lin Zong-hu
College of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 710049，China |
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| 基金项目： | This work was supported by the S and T Development Fund of Shanghai Municipal Commission of Education (Grant No: 01I03)，the Natural Science Key Project of Basic Research of China (Grant No: G1999022308)，the Fund of the Key Rising Discipline of Shanghai |
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| 摘 要： | The stability of the Karmen vortex street in gas-liquid two-phase flow was studied experimentally and theoretically. The values of the parameter h/l characterizing the vortex street structure (i. e. , the ratio of the vortex street width to the distance between two vortexes) for a stable vortex street in gas-liquid two-phase flow were obtained for the first time. The parameter h/l was prpved to be a variable, not a constant as in single-phase flow, h/l is related to the upstream fluid void fraction. In gas-liquid two-phase fluid flow to form a steady vortex street is more difficult than in a single-phase fluid flow. Because in the unsteady vortex shedding the vortex shedding band frequency is broader than the one in the single phase fluid flow, so it is easier to induce the cross-cylinder resonance than in the single phase fluid flow, and this case should give rise to the attention of engineers.
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STABILITY OF VORTEX STREET IN GAS-LIQUID TWO-PHASE FLOW |
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| LIN Zong-hu.STABILITY OF VORTEX STREET IN GAS-LIQUID TWO-PHASE FLOW[J].Journal of Hydrodynamics,2003,15(6). |
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| Authors: | LIN Zong-hu |
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| Abstract: | The stability of the Karmen vortex street in gas-liquid two-phase flow was studied experimentally and theoretically. The values of the parameter h/l characterizing the vortex street structure (i. e. , the ratio of the vortex street width to the distance between two vortexes) for a stable vortex street in gas-liquid two-phase flow were obtained for the first time. The parameter h/l was prpved to be a variable, not a constant as in single-phase flow, h/l is related to the upstream fluid void fraction. In gas-liquid two-phase fluid flow to form a steady vortex street is more difficult than in a single-phase fluid flow. Because in the unsteady vortex shedding the vortex shedding band frequency is broader than the one in the single phase fluid flow, so it is easier to induce the cross-cylinder resonance than in the single phase fluid flow, and this case should give rise to the attention of engineers. |
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| Keywords: | Karmen vortex two phase flow stability cylinder |
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