基于CFD的低水头轴流式水轮机转轮增容改造研究
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摘要
某电站轴流式水轮机由于转轮选型不当和设备老化等问题,出现了噪音较大、效率以及出力低下等现象。为提升机组的效率和出力,根据电站的水力条件,提出了3种改造方案,并通过比较确定了将贯流式转轮替换原轴流式转轮的改造方案。通过CFD分析、效率以及出力计算可知,机组效率、出力以及流量等参数均达到了改造目标。最后,还进行了真机参数的实测,进一步验证了该改造方案的可行性。
Because of improper runner type and equipment aging, the axial-flow turbine of a power station has appeared some problems, such as large noise, low efficiency and low output. In order to improve the efficiency and output of unit, three transformation schemes are proposed based on hydraulic condition analyses. Three schemes are compared and the scheme of replacing original axial-flow runner with tubular runner is determined. The results of CFD simulation and efficiency and output calculations for proposed scheme show that the efficiency, output and flow of unit are all meet the expected targets. After the unit puts into generation, the actual parameters are also measured, which further validates the feasibility of transformation scheme.
Because of improper runner type and equipment aging, the axial-flow turbine of a power station has appeared some problems, such as large noise, low efficiency and low output. In order to improve the efficiency and output of unit, three transformation schemes are proposed based on hydraulic condition analyses. Three schemes are compared and the scheme of replacing original axial-flow runner with tubular runner is determined. The results of CFD simulation and efficiency and output calculations for proposed scheme show that the efficiency, output and flow of unit are all meet the expected targets. After the unit puts into generation, the actual parameters are also measured, which further validates the feasibility of transformation scheme.
引文
[1]李涛.基于CFD的轴流式水轮机增容防蚀改造的研究[D].成都:西华大学,2013.
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[4]王旭,张佳芬,卢婧,等.水轮机转轮割边改造的CFD与模型试验分析[J].机械设计与制造,2017(1):6-8.
[5]史振声.水轮机[M].北京:水利电力出版社,1992.
[6]乔文涛.基于CFD的混流式水轮机内流场计算与分析[D].郑州:华北水利水电大学,2016.
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[8]周凌九,徐红,新崔涛,等.引水部件水力损失对水轮机增容后效率的影响[J].水力发电学报,2011,30(1):160-164.
[9]邹红枣,马苏里.水轮机的类别与出力换算[J].黑龙江水利科技,2009,37(4):133.
[10]马国强,刘建华,刘国峰.澜沧江乌弄龙水电站水轮机主要参数选择[J].水力发电,2011,37(4):70-78.
[2]刘敏,周大庆,吴国颖,等.超低水头轴流式水轮机CFD优化及流动特性研究[J].水电能源科学,2016,34(1):150-153.
[3]赵桂清,赵喜壮,鲍亚萍,等.二龙山水电站轴流式水轮机增容改造[J].东北水利水电,2006,24(2):20-21.
[4]王旭,张佳芬,卢婧,等.水轮机转轮割边改造的CFD与模型试验分析[J].机械设计与制造,2017(1):6-8.
[5]史振声.水轮机[M].北京:水利电力出版社,1992.
[6]乔文涛.基于CFD的混流式水轮机内流场计算与分析[D].郑州:华北水利水电大学,2016.
[7]王旭,李萍.不同湍流模型下水轮机蜗壳CFD仿真精度分析[J].中国农村水利水电,2015(6):158-161.
[8]周凌九,徐红,新崔涛,等.引水部件水力损失对水轮机增容后效率的影响[J].水力发电学报,2011,30(1):160-164.
[9]邹红枣,马苏里.水轮机的类别与出力换算[J].黑龙江水利科技,2009,37(4):133.
[10]马国强,刘建华,刘国峰.澜沧江乌弄龙水电站水轮机主要参数选择[J].水力发电,2011,37(4):70-78.