基于FLUENT的摆杆式明渠测流特性数值模拟
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摘要
为更好地进行灌区输配水管理,提高灌区量水精度,对摆杆式明渠测流装置在D50型U形渠道中测流特性进行数值模拟研究。基于计算流体力学,通过FLUENT软件,采用VOF方法、Realizable k-ε湍流模型以及动网格技术对3种不同材质测流摆杆测流特性进行数值模拟,并利用后处理软件对模拟结果进行分析,发现模拟渠道水位随着流量的增大而增大,水流最大流速位于水面下方,符合明渠水力学基本原理;采用动网格技术对测流摆杆摆动特性进行模拟是可行的;利用测流公式算得流量与实际流量之间平均相对误差小于3%,可以满足明渠测流精度要求。
In order to better manage the water supply and distribution in the irrigation area and improve the accuracy of water measurement, the flow measurement characteristics of swing-rod open channel measuring device in D50 U-shaped-channel were studied by numerical simulation. Based on computational fluid dynamics, using FLUENT software, VOF method, Realizable k-ε turbulence model and dynamic mesh technology, the flow measurement characteristics of three kinds of swing rods with different materials were numerically simulated. The post-processing software was used to analyze the simulation results, and it was found that the water level of the simulated channel increased with the increase of the flow, and the maximum flow velocity was located below the water surface, which conformed to the basic principle of open channel hydraulics. It is feasible to simulate the swing characteristics of the swing rod with the dynamic mesh technology. The average relative error between flow rate and actual flow rate calculated by the formula is less than 3%, which can satisfy the accuracy requirement of open channel flow measurement.
In order to better manage the water supply and distribution in the irrigation area and improve the accuracy of water measurement, the flow measurement characteristics of swing-rod open channel measuring device in D50 U-shaped-channel were studied by numerical simulation. Based on computational fluid dynamics, using FLUENT software, VOF method, Realizable k-ε turbulence model and dynamic mesh technology, the flow measurement characteristics of three kinds of swing rods with different materials were numerically simulated. The post-processing software was used to analyze the simulation results, and it was found that the water level of the simulated channel increased with the increase of the flow, and the maximum flow velocity was located below the water surface, which conformed to the basic principle of open channel hydraulics. It is feasible to simulate the swing characteristics of the swing rod with the dynamic mesh technology. The average relative error between flow rate and actual flow rate calculated by the formula is less than 3%, which can satisfy the accuracy requirement of open channel flow measurement.
引文
[1] 陆文红,阎廷才,徐成波.准确量水在高扬程提灌区的重要意义[J].节水灌溉,2006(5):78-79.
[2] 田济扬,白丹,于福亮,等.基于FLUENT软件的滴灌双向流流道灌水器水力性能数值模拟[J].农业工程学报,2014,30(20):65-71.
[3] 王勇,徐宏海,张菊.基于FLUENT的灌区明渠平板闸门三维流场数值模拟[J].山西水利科技,2014(2):46-49.
[4] Ramon Codina,Guillaume Houzeaux.A finite element method for the solution of rotary pumps[J].Computers & Fluids,2007,36(4):667-679.
[5] V Parthasarathy,Z J Wang.A fully automated chimera methodology for multiple moving body problems[J].International Journal for Numerical Methods in Fluids,2000,33(7):919-938.
[6] 关大玮,程香菊.基于VOF模型的溢流坝三维水流数值模拟[J].中国水运,2015,15(6):51-55,59.
[7] 童亮,余罡,彭政,等.基于VOF模型与动网格技术的两相流耦合模拟[J].武汉理工大学学报(信息与管理工程版),2008,30(4):525-528.
[8] 于晓丽,王树杰,袁鹏,等.两种湍流模型在潮流能水轮机数值模拟中的适用性研究[J].中国海洋大学学报(自然科学版),2019,49(2):114-120.
[9] 高晖,郭烈锦,顾汉洋.梭式窑空气动力模型中紊流流动与对流传热的数值模拟研究[J].硅酸盐学报,2002,30(5):602-607.
[10] 刘志华,熊鹰,叶金铭,等.基于多块混合网格的RANS方法预报螺旋桨敞水性能的研究[J].水动力学研究与进展(A辑),2007,22(4):450-456.
[11] 王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.
[12] 黄思,杨富翔,郭京,等.运用三维动网格技术模拟计算离心泵非定常流动[J].科技导报,2013,31(24):33-36.
[13] 傅德彬,姜毅.用动网格方法模拟导弹发射过程中的燃气射流流场[J].宇航学报,2007,28(2):423-426.
[14] 吴家鸣,钟乐,张恩伟,等.基于动网格技术研究海流对水下机器人运动特性的影响[J].舰船科学技术,2017,39(12):20-25.
[2] 田济扬,白丹,于福亮,等.基于FLUENT软件的滴灌双向流流道灌水器水力性能数值模拟[J].农业工程学报,2014,30(20):65-71.
[3] 王勇,徐宏海,张菊.基于FLUENT的灌区明渠平板闸门三维流场数值模拟[J].山西水利科技,2014(2):46-49.
[4] Ramon Codina,Guillaume Houzeaux.A finite element method for the solution of rotary pumps[J].Computers & Fluids,2007,36(4):667-679.
[5] V Parthasarathy,Z J Wang.A fully automated chimera methodology for multiple moving body problems[J].International Journal for Numerical Methods in Fluids,2000,33(7):919-938.
[6] 关大玮,程香菊.基于VOF模型的溢流坝三维水流数值模拟[J].中国水运,2015,15(6):51-55,59.
[7] 童亮,余罡,彭政,等.基于VOF模型与动网格技术的两相流耦合模拟[J].武汉理工大学学报(信息与管理工程版),2008,30(4):525-528.
[8] 于晓丽,王树杰,袁鹏,等.两种湍流模型在潮流能水轮机数值模拟中的适用性研究[J].中国海洋大学学报(自然科学版),2019,49(2):114-120.
[9] 高晖,郭烈锦,顾汉洋.梭式窑空气动力模型中紊流流动与对流传热的数值模拟研究[J].硅酸盐学报,2002,30(5):602-607.
[10] 刘志华,熊鹰,叶金铭,等.基于多块混合网格的RANS方法预报螺旋桨敞水性能的研究[J].水动力学研究与进展(A辑),2007,22(4):450-456.
[11] 王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.
[12] 黄思,杨富翔,郭京,等.运用三维动网格技术模拟计算离心泵非定常流动[J].科技导报,2013,31(24):33-36.
[13] 傅德彬,姜毅.用动网格方法模拟导弹发射过程中的燃气射流流场[J].宇航学报,2007,28(2):423-426.
[14] 吴家鸣,钟乐,张恩伟,等.基于动网格技术研究海流对水下机器人运动特性的影响[J].舰船科学技术,2017,39(12):20-25.
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