潜水泵装置水力特性及优化设计研究
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摘要
潜水泵装置是一种新型的泵装置型式,与其它泵装置型式相比,具有结构简单,运行维护方便、土建投资省等优点,已广泛应用于水资源调配、城镇防洪、水环境改善及农业排灌等等方面,具有广阔的应用前景。随着大型潜水泵装置的逐步推广应用,对其水力性能的要求不断提高。目前国内外对潜水泵装置的水力性能还缺乏深入了解,潜水泵装置优化水力设计的研究仍处于起步阶段。
为了完善潜水泵装置优化水力设计理论,进一步提高卧式和立式潜水泵装置的水力性能,使这种具有很多优点的泵装置型式得到更好、更多的应用,本文采用以流道单独研究为主、泵装置整体研究为辅和以数值计算为主、模型试验为辅的方法,对卧式和立式潜水泵装置进行了较为深入的优化水力设计研究工作。具体包括以下几个方面：
(1)根据泵站进、出水流道优化水力设计的目标,采用流道单独研究的方法,对卧式潜水泵装置的进、出水流道分别进行了三维湍流流动数值模拟和优化水力设计研究,在此基础上还进行了卧式潜水泵装置内部流动三维湍流流动数值模拟；
(2)在卧式潜水泵装置进、出水流道优化水力设计研究的基础上,对进、出水流道优化方案分别进行了流道模型试验研究,并将试验结果与数值模拟结果进行分析比较；
(3)结合工程实际需要,完成了江苏省灌北泵站卧式潜水泵装置模型试验,测试了泵装置整体的水力性能,并与该站进、出水流道单独研究的结果进行了比较；
(4)对广东省广和泵站立式井筒式潜水泵装置进、出水流道进行了优化水力设计研究,针对井筒式出水流道效率不高的原因,首次提出了一种立式虹吸式潜水泵装置新型式,并进行了三维湍流流动数值模拟和优化水力设计研究；
(5)对广东省广和泵站立式虹吸式潜水泵装置的出水流道进行了流道模型试验,观察了流道内的流态、测试了流道水力损失,并与数值模拟结果进行了对比。
本文通过对卧式和立式潜水泵装置水力特性的研究,得到了以下主要结论：
(1)经过流道优化水力设计得到的卧式潜水泵装置流道顺直、水力性能优异,该研究成果可成功应用于工程实际；
(2)文中首次提出的新型立式虹吸式潜水泵装置水力性能明显优于传统的立式井筒式潜水泵装置,可供实际工程采用；
(3)本文卧式潜水泵装置进、出水流道优化水力设计的结果与泵装置能量性能模型试验的结果一致,这说明本文对潜水泵装置进、出水流道的优化水力设计是正确的。
Submerged pump system is a new pump type. Compared to other pump types, it has many advantages of more simple structure, more convenient maintenance and less civil investment. This pump type is applied widely in water resources allocation, urban flood control, water environment improvement and agriculture drainage and irrigation, etc, which means it has the higher application foreground. The extensive use of lager submerged pump system puts forward a higher requirement for its hydraulic performance. Currently, the hydraulic performance of the submerged pump system at home and abroad is still lack in-depth understood, and its optimum hydraulic design research is still in primary stage.
In order to perfect the optimum hydraulic design theory of the submerged pump system, further improve the hydraulic performance of horizontal and vertical submerged pump systems, and make this pump type with many advantages has better and more application, the optimum hydraulic design of horizontal and vertical submerged pump system is comparatively deep studied in this paper by the help of the conduit isolated study mainly while the pump system overall study secondly, and numerical computation mainly while model test secondly. The idiographic contents includes the following aspects:
(1) According to the objective of the optimum hydraulic design for the inlet and outlet conduits, the numerical computation of 3D turbulent flow for the inlet and outlet conduits of the horizontal submerged pump system is completed by the help of conduit isolated study, the numerical computation of 3D turbulent flow for the interior flow of the horizontal submerged pumping is also completed;
(2) Based on the optimum hydraulic design of the inlet and outlet conduits of the horizontal submerged pump system, the model test for inlet and outlet conduits are completed, and the test results are compared with the numerical simulation results;
(3) Combined with the actual engineering requirement, the model test for horizontal submerged pump system of Guanbei pumping station in Jiangsu province is completed. The pump system hydraulic performance is tested to compare with the inlet and outlet conduits isolated study results;
(4) The optimum hydraulic design for the inlet and outlet conduits of vertical shaft submerged pump system of Guanghe pumping station in Guangdong is completed. According to the low efficiency of the shaft type, a new vertical siphon submerged pump system is proposed. the numerical computation of 3D turbulent flow and the study of optimum hydraulic design are also completed;
(5) The model test for the vertical siphon submerged pump system outlet conduit of Guanghe Pumping Station in Guangdong is completed.the interior flow patterns of the conduts is odserved and the hydraulic losses is measured, and the model test result is compared with the numerical simulation result;
(6) Based on the hydraulic performance research of the horizontal and vertical submerged pumping system, the project investment, installation and maintenance and operation management of these two types are preliminarily analyzed and compared.
The conclusions obtained from the hydraulic research of the horizontal and vertical submerged pumping system are as follows:
(1) The optimized horizontal submerged pump system has straight condut and excellent hydraulic performance, and the research results can be applied to the engineering;
(2) the new vertical siphon submerged pump system is first proposed. The hydraulic performance of which is obviously superior to that of traditional vertical pitshaft submerged pump system, and this pump system can be adopted in actual engineering;
(3) the result of the optimum hydraulic design for horizontal submerged pump system is consistent with the model test result,which means the optimum hydraulic design for horizontal submerged pump system is right.
为了完善潜水泵装置优化水力设计理论,进一步提高卧式和立式潜水泵装置的水力性能,使这种具有很多优点的泵装置型式得到更好、更多的应用,本文采用以流道单独研究为主、泵装置整体研究为辅和以数值计算为主、模型试验为辅的方法,对卧式和立式潜水泵装置进行了较为深入的优化水力设计研究工作。具体包括以下几个方面：
(1)根据泵站进、出水流道优化水力设计的目标,采用流道单独研究的方法,对卧式潜水泵装置的进、出水流道分别进行了三维湍流流动数值模拟和优化水力设计研究,在此基础上还进行了卧式潜水泵装置内部流动三维湍流流动数值模拟；
(2)在卧式潜水泵装置进、出水流道优化水力设计研究的基础上,对进、出水流道优化方案分别进行了流道模型试验研究,并将试验结果与数值模拟结果进行分析比较；
(3)结合工程实际需要,完成了江苏省灌北泵站卧式潜水泵装置模型试验,测试了泵装置整体的水力性能,并与该站进、出水流道单独研究的结果进行了比较；
(4)对广东省广和泵站立式井筒式潜水泵装置进、出水流道进行了优化水力设计研究,针对井筒式出水流道效率不高的原因,首次提出了一种立式虹吸式潜水泵装置新型式,并进行了三维湍流流动数值模拟和优化水力设计研究；
(5)对广东省广和泵站立式虹吸式潜水泵装置的出水流道进行了流道模型试验,观察了流道内的流态、测试了流道水力损失,并与数值模拟结果进行了对比。
本文通过对卧式和立式潜水泵装置水力特性的研究,得到了以下主要结论：
(1)经过流道优化水力设计得到的卧式潜水泵装置流道顺直、水力性能优异,该研究成果可成功应用于工程实际；
(2)文中首次提出的新型立式虹吸式潜水泵装置水力性能明显优于传统的立式井筒式潜水泵装置,可供实际工程采用；
(3)本文卧式潜水泵装置进、出水流道优化水力设计的结果与泵装置能量性能模型试验的结果一致,这说明本文对潜水泵装置进、出水流道的优化水力设计是正确的。
Submerged pump system is a new pump type. Compared to other pump types, it has many advantages of more simple structure, more convenient maintenance and less civil investment. This pump type is applied widely in water resources allocation, urban flood control, water environment improvement and agriculture drainage and irrigation, etc, which means it has the higher application foreground. The extensive use of lager submerged pump system puts forward a higher requirement for its hydraulic performance. Currently, the hydraulic performance of the submerged pump system at home and abroad is still lack in-depth understood, and its optimum hydraulic design research is still in primary stage.
In order to perfect the optimum hydraulic design theory of the submerged pump system, further improve the hydraulic performance of horizontal and vertical submerged pump systems, and make this pump type with many advantages has better and more application, the optimum hydraulic design of horizontal and vertical submerged pump system is comparatively deep studied in this paper by the help of the conduit isolated study mainly while the pump system overall study secondly, and numerical computation mainly while model test secondly. The idiographic contents includes the following aspects:
(1) According to the objective of the optimum hydraulic design for the inlet and outlet conduits, the numerical computation of 3D turbulent flow for the inlet and outlet conduits of the horizontal submerged pump system is completed by the help of conduit isolated study, the numerical computation of 3D turbulent flow for the interior flow of the horizontal submerged pumping is also completed;
(2) Based on the optimum hydraulic design of the inlet and outlet conduits of the horizontal submerged pump system, the model test for inlet and outlet conduits are completed, and the test results are compared with the numerical simulation results;
(3) Combined with the actual engineering requirement, the model test for horizontal submerged pump system of Guanbei pumping station in Jiangsu province is completed. The pump system hydraulic performance is tested to compare with the inlet and outlet conduits isolated study results;
(4) The optimum hydraulic design for the inlet and outlet conduits of vertical shaft submerged pump system of Guanghe pumping station in Guangdong is completed. According to the low efficiency of the shaft type, a new vertical siphon submerged pump system is proposed. the numerical computation of 3D turbulent flow and the study of optimum hydraulic design are also completed;
(5) The model test for the vertical siphon submerged pump system outlet conduit of Guanghe Pumping Station in Guangdong is completed.the interior flow patterns of the conduts is odserved and the hydraulic losses is measured, and the model test result is compared with the numerical simulation result;
(6) Based on the hydraulic performance research of the horizontal and vertical submerged pumping system, the project investment, installation and maintenance and operation management of these two types are preliminarily analyzed and compared.
The conclusions obtained from the hydraulic research of the horizontal and vertical submerged pumping system are as follows:
(1) The optimized horizontal submerged pump system has straight condut and excellent hydraulic performance, and the research results can be applied to the engineering;
(2) the new vertical siphon submerged pump system is first proposed. The hydraulic performance of which is obviously superior to that of traditional vertical pitshaft submerged pump system, and this pump system can be adopted in actual engineering;
(3) the result of the optimum hydraulic design for horizontal submerged pump system is consistent with the model test result,which means the optimum hydraulic design for horizontal submerged pump system is right.
引文
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