前级叶片安装角对对旋轴流风机的性能影响
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摘要
为研究两级动叶安装角可调的对旋轴流风机的前级叶片安装角与风机整体性能的匹配,本文利用CFD软件,对风机模型进行了三维全流场数值模拟与分析。结果表明:在小流量工况下,适当调小风机的前级叶片安装角可以提高风机的效率;风机在运行过程中,根据当前工况选择合适的安装角,可以有效提高对旋轴流风机的整体性能,改善各流动参数在风机中的分布情况,减少流动损失,扩大工作范围,延迟风机失速和喘振的发生。
In order to study the effect of front stage blade mounting angle on performance of counter-rotating axial flow fan,the simulated analysis of flow field of axial fan model is carried out by CFD. The results shows an increasing overall efficiency of the fan when the mounting angle of the front stage blades appropriate decreases under the small mass flow condition. During the operation of the fan, selecting the appropriate mounting angle according to the current mass flow condition can effectively improve the aerodynamic performance and the distribution of various flow parameters of the fan, at the same time, the flow loss will be less. What's more, the working range is expanded, and it will delay the occurrence of stall and surge.
In order to study the effect of front stage blade mounting angle on performance of counter-rotating axial flow fan,the simulated analysis of flow field of axial fan model is carried out by CFD. The results shows an increasing overall efficiency of the fan when the mounting angle of the front stage blades appropriate decreases under the small mass flow condition. During the operation of the fan, selecting the appropriate mounting angle according to the current mass flow condition can effectively improve the aerodynamic performance and the distribution of various flow parameters of the fan, at the same time, the flow loss will be less. What's more, the working range is expanded, and it will delay the occurrence of stall and surge.
引文
[1]昌泽舟.轴流式通风机实用技术[M].北京:机械工业出版社,2005:6-8.
[2] Liu P, Jin Y Z, Wang Y P. Effects of rotor structure on performance of small size axial flow fans[J]. Journal of Thermal Science, 2011,20(3):205-210.
[3] Cho L, Choi H, Lee S, et al. Numerical and experimental analyses for the aerodynamic design of high pressure counter-rotating axial flow fans[C]. Vail, CO, United states:Proceedings of the ASME Fluids Engineering Division Summer Conference, 2009, 2:231-244.
[4] Nouri H, Ravelet F, Bakir F, et al. Design and experimental validation of a ducted counter-rotating axial-flow fans system[J].Journal of Fluids Engineering, 2012, 34:1-6.
[5]赵强,邢印.对旋式轴流风机全角度整机数值模拟及试验验证[J].风机技术, 2014(z1):31-36.
[6]幸欣,吴国维.基于叶片安装角调节的对旋局部通风机特性研究[D].山西:太原理工大学, 2017.
[7]叶学民,丁学亮,李春曦.动叶可调轴流风机瞬态流动及压力脉动特性[J].动力工程学报, 2016, 36(4):277-285.
[8]叶学民,李俊,王松岭.动叶可调轴流式通风机叶片安装角异常工况下的气动特性[J].中国电机工程学报, 2009(26):70-84.
[9]封遥,董云山,司风琪.大型火电机组轴流风机运行特性及内流特征的数值模拟[J].风机技术, 2017(3):34-39.
[10]李嵩,朱之墀.风机气动性能数值模拟的地位和技巧(二)[J].风机技术, 2013(6):83-87.
[11]陈阳,蒋博彦,王军.后置导风锥对轴流风机性能影响的研究[J].风机技术, 2016(5):31-35.
[12]谢龙汉,赵新宇. ANSYS CFX流体分析及仿真[M].北京:电子工业出版社, 2013:15-16.
[13]王天垚.基于平面叶栅设计方法的轴流式通风机叶片设计[D].浙江:浙江理工大学, 2018.
[14]徐金秋.两级轴流式通风机级间流动分析及叶片优化设计[D].浙江:浙江理工大学, 2017.
[15]田翠茹,李宝宽.叶顶间隙对轴流风机性能影响的大涡模拟研究[J].风机技术, 2018(1):33-38.
[16]李新颖.两级动叶可调轴流风机内流特征与气动性能研究[D].北京:华北电力大学, 2014.
[2] Liu P, Jin Y Z, Wang Y P. Effects of rotor structure on performance of small size axial flow fans[J]. Journal of Thermal Science, 2011,20(3):205-210.
[3] Cho L, Choi H, Lee S, et al. Numerical and experimental analyses for the aerodynamic design of high pressure counter-rotating axial flow fans[C]. Vail, CO, United states:Proceedings of the ASME Fluids Engineering Division Summer Conference, 2009, 2:231-244.
[4] Nouri H, Ravelet F, Bakir F, et al. Design and experimental validation of a ducted counter-rotating axial-flow fans system[J].Journal of Fluids Engineering, 2012, 34:1-6.
[5]赵强,邢印.对旋式轴流风机全角度整机数值模拟及试验验证[J].风机技术, 2014(z1):31-36.
[6]幸欣,吴国维.基于叶片安装角调节的对旋局部通风机特性研究[D].山西:太原理工大学, 2017.
[7]叶学民,丁学亮,李春曦.动叶可调轴流风机瞬态流动及压力脉动特性[J].动力工程学报, 2016, 36(4):277-285.
[8]叶学民,李俊,王松岭.动叶可调轴流式通风机叶片安装角异常工况下的气动特性[J].中国电机工程学报, 2009(26):70-84.
[9]封遥,董云山,司风琪.大型火电机组轴流风机运行特性及内流特征的数值模拟[J].风机技术, 2017(3):34-39.
[10]李嵩,朱之墀.风机气动性能数值模拟的地位和技巧(二)[J].风机技术, 2013(6):83-87.
[11]陈阳,蒋博彦,王军.后置导风锥对轴流风机性能影响的研究[J].风机技术, 2016(5):31-35.
[12]谢龙汉,赵新宇. ANSYS CFX流体分析及仿真[M].北京:电子工业出版社, 2013:15-16.
[13]王天垚.基于平面叶栅设计方法的轴流式通风机叶片设计[D].浙江:浙江理工大学, 2018.
[14]徐金秋.两级轴流式通风机级间流动分析及叶片优化设计[D].浙江:浙江理工大学, 2017.
[15]田翠茹,李宝宽.叶顶间隙对轴流风机性能影响的大涡模拟研究[J].风机技术, 2018(1):33-38.
[16]李新颖.两级动叶可调轴流风机内流特征与气动性能研究[D].北京:华北电力大学, 2014.