| 一级半轴流式透平的非定常流动干涉与时序效应 |
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| 引用本文： | 石,邓清华,李军,丰镇平.一级半轴流式透平的非定常流动干涉与时序效应[J].动力工程,2009,29(2). |
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| 作者姓名： | 石 邓清华 李军 丰镇平 |
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| 作者单位： | 西安交通大学能源与动力工程学院,叶轮机械研究所,西安,710049
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 对Aachen一级半轴流式透平进行了全三维粘性非定常流动数值模拟,分析了相邻叶排间主要干涉现象和时序效应.结果表明:相邻叶排的压力有势场存在势干涉,动叶与第2列静叶间的势干涉更为强烈,势干涉定量反应为静压波动,并以一定的速度向上、下游传播;被动叶截断的上游静叶尾迹在动叶通道中发生变形而周期性地出现在绝对坐标系的固定位置,为时序效应的产生创造条件,通过分析动叶出口熵值的时空分布图可确定下游静叶的最优时序位置;透平级出口非定常熵值定性决定了非定常效率,为透平的非定常优化设计提供了目标参数.
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| 关 键 词： | 一级半透平 非定常流动 时序效应 全三维 数值模拟 |
Interaction and Clocking Effect of Unsteady Flow in a One and a Half Axial-flow Turbine Stage |
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| SHI Yan,DENG Qing-hua,LI Jun,FENG Zhen-ping.Interaction and Clocking Effect of Unsteady Flow in a One and a Half Axial-flow Turbine Stage[J].Power Engineering,2009,29(2). |
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| Authors: | SHI Yan DENG Qing-hua LI Jun FENG Zhen-ping |
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| Affiliation: | Institute of Turbomachniery;School of Energy and Power Engineering;Xi'an Jiaotong University;Xi'an 710049;China |
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| Abstract: | The unsteady flow in a one and a half of Aachen axial-flow turbine stage was investigated by full three-dimensional viscous numerical simulation,and the main interaction phenomenon of adjacent blade rows and clocking effect were discussed.Results indicate that between adjacent blade rows the interaction of pressure potential field happens,which is more intense between the rotor and the second stator.The interaction of pressure potential field is quantified by the fluctuation of static pressure on the surfac... |
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| Keywords: | one and a half turbine unsteady flow clocking effect full three-dimensional numerical simulation |
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