气体涡轮流量计旋转部件内流场模拟与性能分析
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摘要
为描述涡轮叶片螺旋角对仪表性能的影响,利用CFD计算软件,对安装叶片螺旋角为35°和45°涡轮的DN 150型气体涡轮流量计的内流场进行数值模拟,在此基础上预测流量计的始动流量和压力损失。最后,利用黄金分割法选取量程范围内的测量点,通过仪表负压检测平台得到仪表系数和压力损失。实验结果表涡轮叶片螺旋角对仪表性能参数的影响显著,CFD数值模拟能够较准确地描述仪表内流状态,实现仪表性能的预测,为叶片螺旋角的进一步优化选择提供可行方法。
In order to describe the impacts of turbine blade helix angle on the instrument performances, the inner flow field of rotating part which is equipped 35° and 45° helix angle impeller is simulated using CFD technology. The internal pressure and velocity field distribution are obtained. Based on the results of simulation, the pressure loss and the initial flow are predicted. Finally, the golden cut method is used to select the testing points within the scope, the pressure loss and the instrument coefficient curves are obtained. The results prove that the blade helix angle is a critical parameter for the instrument performances, and the CFD simulation is a good method to describe the inner flow field.
In order to describe the impacts of turbine blade helix angle on the instrument performances, the inner flow field of rotating part which is equipped 35° and 45° helix angle impeller is simulated using CFD technology. The internal pressure and velocity field distribution are obtained. Based on the results of simulation, the pressure loss and the initial flow are predicted. Finally, the golden cut method is used to select the testing points within the scope, the pressure loss and the instrument coefficient curves are obtained. The results prove that the blade helix angle is a critical parameter for the instrument performances, and the CFD simulation is a good method to describe the inner flow field.
引文
[1]张永红.天然气流量计量[M].2版.北京:石油工业出版社,2001.
[2]王俊芳.气体涡轮流量计结构型式分析[J].机械工程师,2007(12):112-113.
[3]LAVANTE E V,BANASZAK U,T.KETTNER,et al.Numerical Simulation of Reynolds Number Effects in a Turbine Flow Meter[C]//Proceedings of the 12th International Conference on Flow Measurement.Beijing:Chinese Society for Measurement Press,2004:575-582.
[4]刘正先,徐莲环.涡轮流量计前导流器的结构与性能[J].机械工程学报,2008,44(1):233-237.
[5]刘正先,孟庆国,梁永超,等.气体涡轮流量计的改进及实验测量[J].流体机械,2003,31(5):8-10.
[6]LI Zhifei,ZHANG Kai,et al.Design and Analysis of Flow Rectifier of Gas Turbine Flowmeter[J].Thermal Science,2013,17(5):1504-1507.
[7]林景殿,苏中地,肖云巩,等.涡轮流量计内部流动的数值模拟[J].石油化工自动化,2011,47(4):60-62.
[8]郑丹丹,张涛.对涡轮流量传感器的仿真研究[J].自动化与仪表,2005(7):29-33.
[9]韩占忠,王敬.FLUENT流体工程仿真计算实例与应用[M].北京:北京理工大学出版社,2004:14-22.
[2]王俊芳.气体涡轮流量计结构型式分析[J].机械工程师,2007(12):112-113.
[3]LAVANTE E V,BANASZAK U,T.KETTNER,et al.Numerical Simulation of Reynolds Number Effects in a Turbine Flow Meter[C]//Proceedings of the 12th International Conference on Flow Measurement.Beijing:Chinese Society for Measurement Press,2004:575-582.
[4]刘正先,徐莲环.涡轮流量计前导流器的结构与性能[J].机械工程学报,2008,44(1):233-237.
[5]刘正先,孟庆国,梁永超,等.气体涡轮流量计的改进及实验测量[J].流体机械,2003,31(5):8-10.
[6]LI Zhifei,ZHANG Kai,et al.Design and Analysis of Flow Rectifier of Gas Turbine Flowmeter[J].Thermal Science,2013,17(5):1504-1507.
[7]林景殿,苏中地,肖云巩,等.涡轮流量计内部流动的数值模拟[J].石油化工自动化,2011,47(4):60-62.
[8]郑丹丹,张涛.对涡轮流量传感器的仿真研究[J].自动化与仪表,2005(7):29-33.
[9]韩占忠,王敬.FLUENT流体工程仿真计算实例与应用[M].北京:北京理工大学出版社,2004:14-22.