基于流道进流指标分析的大型泵站进水池优化调度研究
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摘要
大型泵站多台机组共用进水池,不同机组运行组合时进水池内流态不一,泵站流道进口的水流条件也有所区别,较优的调度方案可避免较差的进流流态从而保证泵站机组运行的稳定性及效率。结合某大型泵站工程,建立进水明渠、箱涵、进水池及进水流道三维数学模型,并以流道进口断面流速均匀度和流速加权平均偏流角为进流指标函数对不同机组组合运行时的进水池内流态及流道进口进流条件进行研究。研究表明:不同开机组合时,泵站进流条件存在一定的区别,并主要体现在流速加权平均偏流角。在开启相同机组台数情况下,机组相邻运行较间隔运行更优,中间机组运行较2侧机组运行更优。根据全组合试验研究提出了不同机组运行数量时的较优组合方案。研究成果可供类似工程参考。
The inlet sumps are shared by many units in large pump stations. The flow pattern in the inlet sump varies with the operation of different units, and the flow conditions at the inlet of the flow passage are also different. Combined with a pump station project, a three-dimensional mathematical model is used to simulate the inlet flow pattern of the pumping station. The uniformity of flow velocity and the weighted average deviation angle of flow velocity at the inlet of the passageways are taken as the judging indexes of the flow regime. The results show that the inlet conditions of pump station are different with different power-on combinations,and mainly reflected in the weighted average drift angle of velocity. The inlet conditions of adjacent units of pumping stations are better than those of interval operation,also intermediate units are better than that of two side units. According to the full combination test research, the better combination scheme for different units starting is put forward. The research results can be used as reference for similar projects.
The inlet sumps are shared by many units in large pump stations. The flow pattern in the inlet sump varies with the operation of different units, and the flow conditions at the inlet of the flow passage are also different. Combined with a pump station project, a three-dimensional mathematical model is used to simulate the inlet flow pattern of the pumping station. The uniformity of flow velocity and the weighted average deviation angle of flow velocity at the inlet of the passageways are taken as the judging indexes of the flow regime. The results show that the inlet conditions of pump station are different with different power-on combinations,and mainly reflected in the weighted average drift angle of velocity. The inlet conditions of adjacent units of pumping stations are better than those of interval operation,also intermediate units are better than that of two side units. According to the full combination test research, the better combination scheme for different units starting is put forward. The research results can be used as reference for similar projects.
引文
[1] 刘超.水泵及水泵站[M].北京:中国水利水电出版社,2009.
[2] GB/T50265-97,泵站设计规范[S].
[3] Anton de Fockert. Automatic swirl angle measurements for pump intake design[J]. Journal of Hydraulic Research,2015,53(3):384-393.
[4] Kim E,Palazzolo A. Rotordynamic force prediction of a shrouded centrifugal pump impeller - part 1:numerical analysis[J]. Journal of Vibration and Acoustics,2016,138(3).
[5] 高传昌,曾新乐,解克宇,等.泵站进水池超低水位下组合整流方案与验证[J].农业工程学报,2017,33(23):101-108.
[6] 许健,陈锋,罗灿,等.闸站结合泵站进水模型试验研究[J].中国农村水利水电,2015,(8):176-179.
[7] 史志鹏,张根广,刘家春,等.基于CFD的泵站进水池流场水流特性分析[J].水电能源科学,2017,35(2):196-199.
[8] 黄广礼.多机组泵站的开机响应[J].水利学报,1989,(10):60-65,72.
[9] 李迎春,罗卫国,李崇智.泵站前池流态分析及开机组合优化[J].中国农村水利水电,2014,(4):108-111.
[10] 王福军,唐学林,陈鑫,等.泵站内部流动分析方法研究进展[J].水利学报,2018,49(1):47-61,71.
[11] 周佩剑. 轴流泵装置进出水流道与泵段水力耦合特性分析[D]. 北京:中国农业大学,2011.
[12] Jones G M,Sanks R L. Pumping station design[M]. 3rd edition. Woburn:Butterworth-Heinemann,2008.
[13] 陆林广. 高性能大型低扬程泵装置优化水力设计[M].北京:中国水利水电出版社,2013.
[14] 朱红耕,袁寿其.大型泵站进水流道技术改造优选设计[J].水力发电学报,2006,(2):51-55.
[15] 资丹,王福军,姚志峰,等.基于响应曲面模型的泵站进水池参数优化方法研究[J].水利学报,2017,48(5):594-607.
[16] ANSI/HI9.8-2012, American national standard for rotodynamic pumps for pump intake design[S].
[2] GB/T50265-97,泵站设计规范[S].
[3] Anton de Fockert. Automatic swirl angle measurements for pump intake design[J]. Journal of Hydraulic Research,2015,53(3):384-393.
[4] Kim E,Palazzolo A. Rotordynamic force prediction of a shrouded centrifugal pump impeller - part 1:numerical analysis[J]. Journal of Vibration and Acoustics,2016,138(3).
[5] 高传昌,曾新乐,解克宇,等.泵站进水池超低水位下组合整流方案与验证[J].农业工程学报,2017,33(23):101-108.
[6] 许健,陈锋,罗灿,等.闸站结合泵站进水模型试验研究[J].中国农村水利水电,2015,(8):176-179.
[7] 史志鹏,张根广,刘家春,等.基于CFD的泵站进水池流场水流特性分析[J].水电能源科学,2017,35(2):196-199.
[8] 黄广礼.多机组泵站的开机响应[J].水利学报,1989,(10):60-65,72.
[9] 李迎春,罗卫国,李崇智.泵站前池流态分析及开机组合优化[J].中国农村水利水电,2014,(4):108-111.
[10] 王福军,唐学林,陈鑫,等.泵站内部流动分析方法研究进展[J].水利学报,2018,49(1):47-61,71.
[11] 周佩剑. 轴流泵装置进出水流道与泵段水力耦合特性分析[D]. 北京:中国农业大学,2011.
[12] Jones G M,Sanks R L. Pumping station design[M]. 3rd edition. Woburn:Butterworth-Heinemann,2008.
[13] 陆林广. 高性能大型低扬程泵装置优化水力设计[M].北京:中国水利水电出版社,2013.
[14] 朱红耕,袁寿其.大型泵站进水流道技术改造优选设计[J].水力发电学报,2006,(2):51-55.
[15] 资丹,王福军,姚志峰,等.基于响应曲面模型的泵站进水池参数优化方法研究[J].水利学报,2017,48(5):594-607.
[16] ANSI/HI9.8-2012, American national standard for rotodynamic pumps for pump intake design[S].