期刊文献+
任意字段
题名或关键词
题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

Effects of Tangential Velocity Distribution on Flow Stability in a Draft Tube 被引量：2

Effects of Tangential Velocity Distribution on Flow Stability in a Draft Tube
原文传递
导出
摘要 Numerical simulations of the flow in the draft tube of a Francis turbine are carried out in order to elucidate the effects of tangential velocity on flow stability.Influence of the location of the maximum tangential velocity is explored considering the equality of the total energy at the inlet of the draft tube.It is found that the amplitude of the pressure fluctuation decreases when the location of the maximum of the tangential velocity moves from the centre to the wall on the cross section.Thus,the stability of the flow in the draft tube increases with the moving of the location of the maximum tangential velocity.However,the relative hydraulic loss increases and the recovery coefficient of the draft tube decreases slightly.
作者 DOU Huashu NIU Lin CAO Shuliang
机构地区 Faculty of Mechanical Engineering and Automation Department of Thermal Engineering
出处 《Journal of Thermal Science》 SCIE EI CAS CSCD 2014年第5期446-453,共8页 热科学学报（英文版）
基金 supported by the open fund of State Key Laboratory of Hydroscience and Engineer of Tsinghua University(No.sklhse-2013-E-02) the Special Major Project of Science and Technology of Zhejiang province(No.2013C 01139)
关键词 draft tube vortex characteristics numerical prediction velocity distribution 流动稳定性 切向速度 导流管 速度分布 混流式水轮机 数值模拟 压力波动 恢复系数
分类号 O35 [理学—流体力学]
  • 相关文献

参考文献13

  • 1Zhang R. K., Cai Q. D., Wu J. Z., Wu Y. L., Liu S. H., and Zhang L.. The Physical Origin of Severe LowFrequency Pressure Fluctuations in Giant Francis Turbines [J]. Modem. Physics. Letters. B, 19(28-29), pp.1527-1530, (2005).
  • 2Susan-Resiga R., Muntean S., Ciocan T., Joubame E., Leroy L Bornard, P. Susan-Resiga R, Muntean S, Ciocan T, et al. Influence of the velocity field at the inlet of a Francis turbine draft tube on performance over an operating range[C]//IOP Conference Series: Earth and Envirorunental Science, Beijing. lOP Publishing, 15(3): 032008, (2012).
  • 3Susan-Resiga R., Ciocan G. D., Anton I., Avellan F., Analysis of the swirling flow downstream a francis turbine runner [J]. Journal of Fluids Engineering, Transactions of the ASME, 128 (1), pp.177-189, (2006).
  • 4Zhang R. K., Mao F., Wu J. Z., Chen S. Y., Wu, Y. L., Characteristics and control of the draft-tube flow in partload Francis turbine[J]. Journal of fluids engineering, 131(2): 021101, (2009).
  • 5Rudolf P, Stefan D., Decomposition of the swirling flow field downstream of Francis turbine runner[C]/lIOP Conference Series: Earth and Envirorunental Science. lOP Publishing, Beijing. 15(6): 062008, (2012).
  • 6Ruprecht A., Helmrich T., Aschenbrenner T., et al. Simulation of vortex rope in a turbine draft tube[C]/lProceed- ings of 21st IAHR Symposium on Hydraulic Machinery and Systems Lausanne, Switzerland. pp. 9-12, (2002).
  • 7Paik J., Sotiropoulos F., Sale M. J., Numerical simulation of swirling flow in complex hydroturbine draft tube using unsteady statistical turbulence models [J]. Journal of hydraulic engineering, 131(6), pp. 441-456, (2005).
  • 8Ciocan G. D., I1iescu M. S., Vu T., c., et al. Experimental study and numerical simulation of the FLINDT draft tube rotating vortex [J]. Journal of Fluids Engineering, 129(2), pp. 146-158, (2007).
  • 9Tridon S., Barre S., Ciocan G. D., et al. Experimental analysis of the swirling flow in a Francis turbine draft tube: Focus on radial velocity component determination [J]. European Journal of Mechanics-BlFluids, 29(4), pp. 321-335, (2010).
  • 10Wu Y., Liu S., Dou H. S., et al. Numerical prediction and similarity study of pressure fluctuation in a prototype Kaplan turbine and the model turbine[J]. Computers & Fluids, 56, pp.l28-142, (2012).

同被引文献18

引证文献2

二级引证文献21

Journal of Thermal Science
2014年 第5期

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部