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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。
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.
[1]尹协远.旋涡流动的稳定性[M].北京:国防工业出版社,2003.
[2]廖伟丽,姬晋延,逯鹏,等.混流式水轮机的非定常流动分析[J].机械工程学报,2009,45(6):134-140.
[3]ARPE J,AVELLAN F.Pressure wall measurements in the whole draft tube:Steady and unsteady analysis[C]//Proceedings of the XXIst IAHR Symposium on Hydraulic Machinery and Systems.Lausanne,Switzerland,2002:593-602.
[4]高忠信,邓杰,葛新峰.三维非定常湍流尾水管涡带数值模拟[J].水利学报,2009,40(10):1162-1167.
[5]钱忠东,杨建东.湍流模型对水轮机压力脉动数值预测的比较[J].水力发电学报,2007(6):111-115.
[6]傅丽萍,阎宗国,吴烈龙,等.水轮发电机组上机架共振分析及补气减振[J].排灌机械工程学报,2013(6):501-505,516.
[7]龚守志.导流栅防止水轮机尾水管内涡带压力脉动的试验研究与应用经验[J].水力发电学报,1984(3):44-52.
[8]潘罗平.水轮机压力脉动信号采集方法的研究[J].大电机技术,2004(2):63-66.
基本信息:
DOI：10.13928/j.cnki.wrahe.2015.12.016
中图分类号:TV734
引用信息:
[1]杨锡平,张思青,于凤荣,等.尾水管导流栅的减振性能分析[J].水利水电技术,2015,46(12):65-67+76.DOI:10.13928/j.cnki.wrahe.2015.12.016.
基金信息:
国家自然科学基金项目(51369012、51469011)
2015-12-20
2015-12-20