| 尾水管导流栅的减振性能分析 |
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| 引用本文： | 杨锡平,张思青,于凤荣,钱晶. 尾水管导流栅的减振性能分析[J]. 水利水电技术, 2015, 46(12): 65 |
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| 作者姓名： | 杨锡平 张思青 于凤荣 钱晶 |
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| 作者单位： | （1.昆明理工大学冶金与能源工程学院，云南昆明650093；2.昆明理工大学电力工程学院，云南昆明650500） |
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| 摘 要： | 针对尾水涡带的偏心运动对涡带压力脉动形成的影响,通过理论分析,推导了压力脉动力与涡带偏心距之间的关系表达式,同时对某实际模型在安装导流栅前后分别进行了全流道的三维湍流数值模拟,综合比较理论与模拟数据。结果表明,通过安装导流栅能起到限制涡带偏心运动的作用,从而达到降低压力脉动的效果。
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| 关 键 词： | 混流式水轮机 尾水涡带 导流栅 非定常流 压力脉动 |
| 收稿时间： | 2015-04-18 |
Analysis on damping performance of diversion barrier for draft tube |
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| YANG Xiping,ZHANG Siqing,YU Fengrong,QIAN Jing. Analysis on damping performance of diversion barrier for draft tube[J]. Water Resources and Hydropower Engineering, 2015, 46(12): 65 |
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| Authors: | YANG Xiping ZHANG Siqing YU Fengrong QIAN Jing |
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| Affiliation: | （1.Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology， Kunming650093，Yunnan, China；2.College of Electric Power Engineering， Kunming University of Science and Technology， Kunming650500， Yunnan, China） |
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| Abstract: | Aiming at the impact from the eccentric movement of tail water vortex zone on the formation of pressure fluctuation， the formula of the relationship between the pressure fluctuation and the eccentric distance of the vortex zone is derived herein， while the 3-D turbulence numerical simulations are respectively made on an actual model before and after installing the diversion barrier， and then the theoretical and simulated data are comprehensively compared as well. It is indicated that the installation of the diversion barrier can play the role of restricting the effect of the vortex zone eccentric movement， thus get the effect to lower the pressure fluctuation. |
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| Keywords: | francis turbine tail water vortex zone diversion barrier unsteady flow pressure fluctuation |
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