矩形迷宫螺旋泵的理论设计、CFD数值计算及试验研究
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摘要
迷宫螺旋泵是在迷宫螺旋密封的机理上发展而来的新型流体机械产品,具有小流量、高扬程、低比转速的突出特点,填补了常规泵类产品的性能空白区,拓宽了流体机械的应用范围。
目前,新型迷宫螺旋泵的研究在国内还刚刚起步,本文所设计的矩形迷宫螺旋泵是其中的一种,鉴于目前理论体系还不成熟的情况下,主要进行了以下几个方面的工作:(1)理论设计:对迷宫螺旋槽的选型及螺纹参数选取做了研究;在相关文献的基础上,确定了设计方法,进行了水力设计计算;设计模型泵结构,绘制零件加工图;(2)CFD数值计算:通过PRO/E进行了流道的三维实体造型,采用GAMBIT完成网格划分;利用流场计算软件FLUENT,采用雷诺平均N-S方程和标准RNGk-ε湍流模型,运用基于非结构网格的SIMPLEC算法,在清水状态下,对泵内流场进行了三维湍流数值模拟,得到了内部流动特征;采用FLUENT计算进行水力性能预测,得到了外特性变化规律;(3)试验研究:确定试验方案、绘制装置图、搭建性能试验台;进行变转速性能试验,分析特性曲线,验证比例定律。
通过试验研究,验证了矩形迷宫螺旋泵的设计方法的合理性,同时,与数值计算结果比较,肯定了所选模型及计算方法的正确性。由于受各种条件所限,本文所做研究还不完善,但所得结论具有普遍意义,以期对今后同类产品的开发、设计具有参考价值。
Labyrinth screw pump, a new fluid mechanical production which with the striking characters of little float amount, high head and low ratio of transmission. , is developed from labyrinth sealing mechanics .So the normal pump products' performance grey area is filled up and the fluid mechanical applied range is widened.
Nowadays, researches about such new labyrinth screw pump have just been done at the first step, rectangle labyrinth screw pump is belonged to such pump. All the researches are done upon the present immature theory system, which include as follows: (1) Theoretical design: In which the parameter selecting of the labyrinth spiral scroll is studied. According to related articles, the design method is determined, with which that hydraulic power design calculation is carried out, so that the pump structure mode is designed and the component treatment chart is draw. (2) CFD numerical calculation: The flow passage three-dimensional objects are modeled through PRO/E and the non-structural mesh was generated with the help of GAMBIT. FLUENT( a special flow field calculation software) is applied to simulate the 3D flow of clean water inside the pump. The Reynolds time-averaged N- S equation and Stand RNG k-εturbulent model, SIMPLEC algorithm based on non-structural mesh are adopted , on which the internal flow characteristics are gained. FLUENT is applied to predict the performance of the pump, and the outer characters can be gained. (3)Experimental study: Both the experimental programs are determined and setting drawing is worked out so that the service test experimental bench can be established. Variable speed service test are used to analyze the performance curve then the scaling law are certified.
Through the experimental research the rationality of the design method of triangular labyrinth screw pump is checked. Meanwhile, the reliability of the selected model and the preciseness of the calculation method can be validated by comparing numerical calculation results. Due to the limited conditions, the researches are unperfected. However, reference value in the future development and design of the like products will be found in this research, because of its universal significance.
目前,新型迷宫螺旋泵的研究在国内还刚刚起步,本文所设计的矩形迷宫螺旋泵是其中的一种,鉴于目前理论体系还不成熟的情况下,主要进行了以下几个方面的工作:(1)理论设计:对迷宫螺旋槽的选型及螺纹参数选取做了研究;在相关文献的基础上,确定了设计方法,进行了水力设计计算;设计模型泵结构,绘制零件加工图;(2)CFD数值计算:通过PRO/E进行了流道的三维实体造型,采用GAMBIT完成网格划分;利用流场计算软件FLUENT,采用雷诺平均N-S方程和标准RNGk-ε湍流模型,运用基于非结构网格的SIMPLEC算法,在清水状态下,对泵内流场进行了三维湍流数值模拟,得到了内部流动特征;采用FLUENT计算进行水力性能预测,得到了外特性变化规律;(3)试验研究:确定试验方案、绘制装置图、搭建性能试验台;进行变转速性能试验,分析特性曲线,验证比例定律。
通过试验研究,验证了矩形迷宫螺旋泵的设计方法的合理性,同时,与数值计算结果比较,肯定了所选模型及计算方法的正确性。由于受各种条件所限,本文所做研究还不完善,但所得结论具有普遍意义,以期对今后同类产品的开发、设计具有参考价值。
Labyrinth screw pump, a new fluid mechanical production which with the striking characters of little float amount, high head and low ratio of transmission. , is developed from labyrinth sealing mechanics .So the normal pump products' performance grey area is filled up and the fluid mechanical applied range is widened.
Nowadays, researches about such new labyrinth screw pump have just been done at the first step, rectangle labyrinth screw pump is belonged to such pump. All the researches are done upon the present immature theory system, which include as follows: (1) Theoretical design: In which the parameter selecting of the labyrinth spiral scroll is studied. According to related articles, the design method is determined, with which that hydraulic power design calculation is carried out, so that the pump structure mode is designed and the component treatment chart is draw. (2) CFD numerical calculation: The flow passage three-dimensional objects are modeled through PRO/E and the non-structural mesh was generated with the help of GAMBIT. FLUENT( a special flow field calculation software) is applied to simulate the 3D flow of clean water inside the pump. The Reynolds time-averaged N- S equation and Stand RNG k-εturbulent model, SIMPLEC algorithm based on non-structural mesh are adopted , on which the internal flow characteristics are gained. FLUENT is applied to predict the performance of the pump, and the outer characters can be gained. (3)Experimental study: Both the experimental programs are determined and setting drawing is worked out so that the service test experimental bench can be established. Variable speed service test are used to analyze the performance curve then the scaling law are certified.
Through the experimental research the rationality of the design method of triangular labyrinth screw pump is checked. Meanwhile, the reliability of the selected model and the preciseness of the calculation method can be validated by comparing numerical calculation results. Due to the limited conditions, the researches are unperfected. However, reference value in the future development and design of the like products will be found in this research, because of its universal significance.
引文
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[3]蔡晓君等.螺旋密封设计原理与最佳螺旋参数的探讨.水泵技术.2000,2:25-28
[4]Kelder,J.D.H,Dijkers,R.J.H.,van Esch,B.P.M.,Kruyt,N.P,Experimental and theoretical study of the flow in the volute of a low specific-speed pump.Fluid Dynamics Research v 28 n 4 April 2001 p 267-280
[5]1981:1-23,70-109
[6]Karow K.concentric Double Srew Seals with Laminar Flow.6th International Conference on Fluid Sealing.paper B4 1971
[7]Golubiev A I.The Development of a Three-stage Screw-Type Labyrinth Seal.4th International Conference on Fluid Sealing,paper 4-H2 1969
[8]Ludwing I.P Storm T,N Allen G P.Experiment study of End Effect and Pressure Patterns in Helical Groove Fluid seal.NASA TND-3096,1965
[9]BoonEF,TalSE.Hydrodynamic seal for rotating shafts.Chemie Lngeuieur-Technik.1959,31(3):202-212
[10]Crease A.B(1979),杨行庄译,顾永泉校.螺旋密封简单的理论和设计方法及主要使用限制.水泵技术.2000,6:39-49
[11]StoffH.Incompressible flow in a labyrinth of Fluid Mechanics.1980,100
[12]Rhode D L.Demko J A.Traigner U K.Morrison G L.Sobolik S R.The prediction of incompressible flow in labyrinth seals.ASME J of Fluid Engineering.1986,108
[13]Egli.A.The leakage of Steam Through Labyrinth Seals.Trans.ASME 1935,57:115-122;Discussion:445-446
[14]Morrison G L et al.Experimental verification of a secondary recirculation zone in a labyrinth seal.ASME Paper 88-369
[15]1981:1-23,70-109
[16]周志安.螺套式螺旋密封的应用研究.化工装备技术.1995,16(3):24-29
[17]吴辉耀.迷宫螺旋密封的设计与应用.石油机械.1996,24(5):18-20
[18]李德俭.浮动螺旋复合密封装置的理论与试验研究.石油机械.2002,3:22-25
[19]吴修德.螺杆泵矩形槽螺旋密封的封液能力及参数优化.河南石油.2003,17(4):50-52
[20]阿达依·谢尔亚孜旦.FLUID MACHINERY.Vol.28.No.5,2000
[21]朱毅征,罗进,韩国军.迷宫螺旋泵和密封的数值模拟.航空学报.1991,12(8):B223-B331
[22]马润梅,黎镜中,段成红.迷宫螺旋泵的设计.流体机械.2002,30(3):12-14
[23]黎镜中,张有忱.“25MLB-100-1.5型单端迷宫螺旋泵”通过鉴定.北京化工大学学报(自然科学版).2004,06:97
[24]张林.梯形迷宫螺旋泵内部流动的数值模拟.石油机械.2005,33(10):20-24
[25]王春林,邢岩.迷宫螺旋泵螺旋槽的实验研究.水泵技术.2006,2:18-20
[26]邢岩,王春林.三角形迷宫螺旋泵内三维湍流数值模拟.水泵技术.2006,4:36-38
[27]郑刚,潘红良.基于数值模拟的迷宫螺旋泵性能研究.润滑与密封.2006,9第9期
[28]田国文,张有忱,黎镜中.迷宫螺旋泵内部流动的CFD模拟.北京化工大学学报.2007第34卷第2期
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[32]关醒凡.现代泵设计手册.北京:宇航出版社,1995
[33]陈越峰等.迷宫密封的间隙研究.风机技术.2000,3:6-9
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[36]黄守龙等.流动的不稳定性对迷宫密封效率的影响.武汉工业大学学报 1999,21(1):44-47
[37]顾永泉.流体动密封.北京:石油大学出版社.1990
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[40]王福军.计算流体动力学分析.北京:清华大学出版社,2005
[41]赵兴艳等.CFD方法在流体机械设计中的应用.流体机械.2000,28(3):22-25
[42]鲁嘉华.计算流体力学与求解方法在叶轮机械中的应用.上海工程技术大学学报.2003,3:16-21
[43]陶文铨.数值传热学(第二版).西安:西安交通大学出版社,2001
[44]陈松山,葛强等.大型双向进水流道三维紊流数值模拟.江苏大学学报(自然科学版)2005,26(2):102-105
[45]王德军,周惠忠等.对旋流轴流泵全流道三维紊流数值模拟.工程力学学报.200421(3): 150-154
[46]刘厚林,袁寿其等.双流道叶轮内湍流的三维数值模拟.排灌机械.2002,20(4):5-8
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